阅读说明：本技术 一种热稳定性强的改性csm汽车正时带及其制备方法 (Modified CSM (Carrier sense multiple Access) automobile timing belt with strong thermal stability and preparation method thereof ) 是由 蒋春雷 侯智杰 于 2021-01-15 设计创作，主要内容包括：本发明涉及传动机构技术领域域,针对现有正时带基体的热稳定性较差的问题,公开了一种热稳定性强的改性CSM汽车正时带,包括带体与位于带体内侧的若干齿体,所述带体与所述齿体一体化成型,所述带体背部设有抗撕裂层,所述带体内部沿周向设有若干组线绳骨架,所述齿体内表面设有橡胶齿布,所述橡胶齿布表面涂覆有齿表涂层。本发明通过在氯磺化聚乙烯橡胶中加入填料与促融合剂,来提升基体材料的软化点,进而加正时带整体的热稳定性,运行耐高温等级可比传统氯丁(CR)橡胶产品高,乘用车常规运行状态下,可以提高正时带使用寿命约4万公里,大大减少额外维护更换带来的问题,同时也更好的适配气温较高的地区。(The invention relates to the technical field of transmission mechanisms, and aims at solving the problem of poor thermal stability of the conventional timing belt matrix, and discloses a modified CSM (Carrier sense multiple Access) automobile timing belt with strong thermal stability. According to the invention, the filler and the fusion promoter are added into the chlorosulfonated polyethylene rubber to improve the softening point of the matrix material, so that the overall thermal stability of the timing belt is improved, the operation high temperature resistant grade is higher than that of the traditional Chloroprene (CR) rubber product, the service life of the timing belt can be prolonged by about 4 kilometres under the conventional operation state of a passenger vehicle, the problems caused by additional maintenance and replacement are greatly reduced, and the chlorosulfonated polyethylene rubber is better adapted to areas with higher air temperature.)

1. The utility model provides a modified CSM automobile timing belt that thermal stability is strong, includes the area body (1) and is located a plurality of tooth bodies (2) of the area body (1) inboard, the area body (1) with tooth body (2) integrated into one piece, area body (1) back is equipped with anti tear layer (4), its characterized in that, the area body (1) is inside to be equipped with a plurality of groups line skeleton (3) along circumference, tooth body (2) internal surface is equipped with rubber tooth cloth (5), rubber tooth cloth (5) surface coating has tooth surface coating (6).

2. A modified CSM automotive timing belt with high thermal stability as claimed in claim 1, wherein the angle a between two sides of said tooth body (2) is 26-27 °, and the height h of said tooth body (2) is 3.4-3.6 mm.

3. A thermally stable modified CSM automotive timing belt as claimed in claim 1 or 2, wherein the ratio of the pitch of said cord carcass (3) to the thickness of the belt body (1) is 1: 3-5.

4. A thermally stable modified CSM automotive timing belt as claimed in claim 3, wherein the ratio of the distance between the root of said tooth (2) and the thickness of the belt body (1) is 2: 0.8-1.

5. A modified CSM automotive timing belt with high thermal stability as recited in claim 1, wherein said belt body (1) material is modified chlorosulfonated polyethylene rubber.

6. The modified CSM automotive timing belt with high thermal stability of claim 5, wherein the modified chlorosulfonated polyethylene rubber comprises the following components by mass: 60-90 parts of chlorosulfonated polyethylene rubber, 10-30 parts of modified rubber, 4-6 parts of a fusion promoter, 1-10 parts of aramid short fiber, 1-3 parts of stearic acid, 1-5 parts of 4,4' -dioctyl diphenylamine, 1-5 parts of N, N-di-N-butyl nickel dithiocarbamate, 30-60 parts of N774 carbon black, 3-10 parts of RS107 ester, 3-10 parts of magnesium oxide and 1-10 parts of dicumyl peroxide.

7. The modified CSM automotive timing belt with strong thermal stability of claim 6, wherein the fluxing agent is tung oil-activated lignin modified rosin and is prepared by the following steps:

(1) putting rosin into a reaction vessel, heating to 170 ℃ for melting, dropwise adding tung oil, continuously reacting for 5.2-6h, then adding ZnO as a catalyst, dropwise adding trimethylolethane, heating to 190 ℃ for reacting for 1-1.2h, and continuously heating to 215 ℃ for reacting for 1.5-2h to obtain a product I;

(2) adding activated lignin into the product I, and reacting at 190-.

8. The modified CSM automotive timing belt with strong thermal stability of claim 7, wherein the specific gravity of the rosin, the tung oil, the activated lignin, the ZnO and the trimethylolethane is 8-10 g: 5-7 g: 4-6 g: 0.5-0.6 g: 1-1.5 g.

9. The modified CSM automotive timing belt with high thermal stability of claim 7, wherein the activated lignin is prepared by the following steps: culturing fomes fomentarius in culture solution at 30-32 deg.C for two days, sterilizing lignin, adding into the culture solution, culturing for 10-12h, with the rotation speed of shaking table at 160 rpm, activating, and separating out activated lignin, wherein fomes fomentarius accounts for 2-4% of lignin weight.

10. A method of making a highly thermally stable modified CSM automotive timing belt as claimed in any one of claims 1 to 9, comprising the steps of:

A. preparing raw materials in the previous process: preparing rubber tooth cloth by using nylon elasticity after gum dipping, calendering modified chlorosulfonated polyethylene rubber into sheets, preparing a cord framework material, preparing a tear-resistant layer cloth material and preparing a forming vulcanization mold;

B. a molding procedure: sleeving a gum dipping cloth sleeve on a forming die, winding, and then encapsulating;

C. and (3) a vulcanization procedure: putting the mold into a vulcanizing cylinder, and putting a rubber sleeve outside the mold for vulcanization;

D. a back grinding procedure: placing the molding belt barrel on a back grinding machine, and grinding the thickness of the belt barrel to meet the requirements of a drawing;

E. a cutting procedure: cutting the belt barrel with the ground back according to the width required by the drawing;

F. a length measuring procedure: measuring the effective length of the cut belt;

G. and (3) inspection and packaging: the appearance and size of the belt were inspected and packaged.

Technical Field

The invention relates to the technical field of transmission mechanisms, in particular to a modified CSM (Carrier sense multiple Access) automobile timing belt with high thermal stability and a preparation method thereof.

Background

With the continuous development and progress of the automobile industry, the requirements of automobile transmission parts are higher and higher. The automobile timing belt is a power transmission part of an automobile, is an important part for connecting power and a maneuvering part of the automobile, and can not move with less power. With the widespread use of automobiles, this component is also rapidly developing. The automobile timing belt is a rubber product, is in a closed belt shape, has a smooth outer surface and a plurality of regular dentations on the inner surface, and plays a role in transferring kinetic energy in an engine of an automobile. The timing belt is tightly sleeved on two driving wheels of an engine, when the automobile engine is started, a lifting wheel can be rotated, and the toothed protrusions on the inner side of the timing belt are meshed with the toothed protrusions on the surface of the rotating wheel, so that the timing belt rotates along with the rotation of the gear when the gear rotates. At this time, another gear engaged with the timing belt is driven by the timing belt to rotate at the same speed, so that the power generated by the engine is transmitted out through the timing belt, and the force acts on the machine, thereby driving the automobile. Therefore, the requirement on the overall performance (including physical performance and chemical performance) of the automobile timing belt is high, especially the timing belt inside the engine is close to the engine and can be attacked by continuous heat, and for the timing belt with poor thermal stability, high labor hour and maintenance cost are needed for replacing or maintaining the timing belt once, and in addition, the experience of a driving user is also influenced by the timing belt with poor performance. Therefore, it is of great significance to develop a timing belt with high thermal stability and strong comprehensive mechanical properties.

Patent number CN201710180335.X, patent name "a diesel vehicle engine synchronous belt", a diesel vehicle engine synchronous belt, including the endless belt, the endless belt includes second asbestos cloth, first aramid fiber cord, first asbestos cloth, second adhesive glue, tooth layer, fourth glue film, first louvre, second louvre, polyester staple fiber, third glue film, first adhesive glue, strengthening rib, steel wire heart yearn, asbestos cloth cover, second glue film, imitative inlayer cow hide elastic layer, second aramid fiber cord, third aramid fiber cord and first glue film, inlay the second aramid fiber cord along the hold-in range width direction in the first glue film, connect the third aramid fiber cord between two adjacent second aramid fiber cords, imitative inlayer cow hide elastic layer is under the first glue film, imitative inlayer cow hide elastic layer is under the second glue film; the invention has the advantages that: the steel wire core wire and the aramid fiber cord are simultaneously used as a reinforcing framework; however, the disadvantage is that the thermal stability of the belt matrix is poor.

Disclosure of Invention

The invention provides a modified CSM automobile timing belt with strong thermal stability and a preparation method thereof, aiming at overcoming the problem of poor thermal stability of the matrix of the existing timing belt. According to the invention, the filler and the fusion promoter are added into the chlorosulfonated polyethylene rubber to improve the softening point of the matrix material, so that the overall thermal stability of the timing belt is improved, the operation high temperature resistant grade is higher than that of the traditional Chloroprene (CR) rubber product, the service life of the timing belt can be prolonged by about 4 kilometres under the conventional operation state of a passenger vehicle, the problems caused by additional maintenance and replacement are greatly reduced, and the chlorosulfonated polyethylene rubber is better adapted to areas with higher air temperature.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a modified CSM car timing belt that thermal stability is strong, includes the area body and is located a plurality of tooth bodies of the internal side of area, the area body with tooth body integration shaping, area body back is equipped with the anti-tear layer, the internal portion of area is equipped with a plurality of groups line skeleton along circumference, tooth internal surface is equipped with rubber tooth cloth, the surface coating of rubber tooth cloth has tooth surface coating.

According to the invention, the rubber tooth cloth is arranged on the inner surface of the tooth body, and is wear-resistant nylon cloth, so that the transverse anti-twisting capability and rigidity of the multi-timing belt can be improved, and the twisting in the multi-timing belt during transmission can be reduced, and the multi-timing belt, especially the inner part of the belt body, can be prevented from being torn; the rubber tooth cloth is arranged between the tooth body and the tooth surface coating, and the tooth surface coating penetrates into the rubber tooth cloth, so that the tooth body, the rubber tooth cloth and the tooth surface coating are tightly combined, and the rubber tooth cloth and the tooth body can be prevented from being peeled off in the transmission process of the timing belt; in addition, rubber tooth cloth does not directly contact with the belt wheel, and rapid abrasion between the multi-timing belt and the belt wheel is not caused to reduce transmission efficiency.

Preferably, the included angle a between the two side surfaces of the tooth body is 26-27 degrees, and the height h of the tooth body is 3.4-3.6.

Tooth body structure of this size: the tooth body is higher, and the shearing resistance is stronger; the tooth body angle is bigger, and the operation is more smooth, prevents jumping the tooth, and the no abnormal sound for the use and the operating efficiency of timing area are higher.

Preferably, the ratio of the spacing of the thread rope frameworks to the thickness of the belt body is 1: 3-5.

Preferably, the ratio of the distance of the tooth root to the thickness of the belt body is 2: 0.8-1.

Preferably, the belt body material is modified chlorosulfonated polyethylene rubber.

Preferably, the modified chlorosulfonated polyethylene rubber comprises the following components in parts by mass: 60-90 parts of chlorosulfonated polyethylene rubber, 10-30 parts of modified rubber, 4-6 parts of a fusion promoter, 1-10 parts of aramid short fiber, 1-3 parts of stearic acid, 1-5 parts of 4,4' -dioctyl diphenylamine, 1-5 parts of N, N-di-N-butyl nickel dithiocarbamate, 30-60 parts of N774 carbon black, 3-10 parts of RS107 ester, 3-10 parts of magnesium oxide and 1-10 parts of dicumyl peroxide.

The chlorosulfonated polyethylene rubber is modified by adding the fusion promoter and other additives, so that the additives have high compatibility and fluidity, the fusion of the additives and a rubber matrix can be fully promoted, the molecular branched chains can be fully permeated, the additives are not easy to separate, and the chlorosulfonated polyethylene rubber has high weather resistance, wear resistance and thermal stability. Meanwhile, reinforcing materials such as aramid short fibers and dispersing materials such as N774 carbon black are added, so that the belt body material has stronger synergistic effect on all components, has integral formability and has stronger physical and chemical properties.

Preferably, the fluxing agent is tung oil-activated lignin modified rosin, and the preparation process is as follows:

(1) putting rosin into a reaction vessel, heating to 170 ℃ for melting, dropwise adding tung oil, continuously reacting for 5.2-6h, then adding ZnO as a catalyst, dropwise adding trimethylolethane, heating to 190 ℃ for reacting for 1-1.2h, and continuously heating to 215 ℃ for reacting for 1.5-2h to obtain a product I;

(2) adding activated lignin into the product I, and reacting at 190-.

Preferably, the specific gravity of the rosin, the tung oil, the activated lignin, the ZnO and the trimethylolethane is 8 to 10 g: 5-7 g: 4-6 g: 0.5-0.6 g: 1-1.5 g.

The tung oil-activated lignin modified rosin is introduced as a fusion promoter, lignin can be introduced, the lignin is an amorphous polymer formed by connecting phenylpropane units through carbon-carbon bonds and ether bonds, the surface of the lignin also contains a plurality of reactive groups, and the chemical bonding capability of the lignin and other modified components can be enhanced; although the molecular structure of the tung oil is larger, the molecular chain of the tung oil is basically not provided with a flexible structure, so that the viscosity of the whole fluxing agent is lower, and the good fluidity of the fluxing agent is ensured; the flexible molecular chain in the tung oil occupies a larger proportion, the compatibility of the molecular structure of the tung oil with other components is obviously improved, the breaking strength and the breaking elongation of a surface layer material are further improved, the integral weather resistance of the rubber matrix is further improved, the tung oil has a better lubricating effect, the friction coefficient of the rubber matrix is reduced under the condition of ensuring that a supporting acting force is provided, and the integral wear resistance of the rubber matrix is further improved; the tung oil-activated lignin modified rosin has a molecular structure and good permeability and compatibility with other components, so that the complexing capacity and the stability of the added components are high, the migration of the added filler components to the surface layer is reduced, the escape of the added filler components is avoided, the weather resistance and the wear resistance of the rubber matrix are quickly attenuated, and the excellent quality and the thermal stability of the rubber matrix are ensured. In addition, the tung oil-activated lignin modified rosin added in the invention is a natural component, no harmful gas is released in the processing process, the body is not damaged, and the invention has better environmental protection effect.

Preferably, the preparation process of the activated lignin is as follows: culturing fomes fomentarius in culture solution at 30-32 deg.C for two days, sterilizing lignin, adding into the culture solution, culturing for 10-12h, with the rotation speed of shaking table at 160 rpm, activating, and separating out activated lignin, wherein fomes fomentarius accounts for 2-4% of lignin weight.

In the process of activating and modifying by adopting fomes fomentarius, demethylation action can be generated, and partial bonds in lignin can be promoted to break, so that the content of phenolic hydroxyl groups in the lignin is increased, which is favorable for promoting further reaction and combination of the lignin, tung oil and rosin, so that the overall stability of the fusion promoter is higher, meanwhile, the phenolic hydroxyl groups also ensure that the lignin and even the fusion promoter have stronger fluidity in the mixing process, so that the mixing uniformity of all raw materials is high, and the improvement of the thermal stability and the mechanical property of the finally prepared product is favorable.

The preparation method of the modified CSM automobile timing belt with strong thermal stability comprises the following preparation steps:

A. preparing raw materials in the previous process: preparing rubber tooth cloth by using nylon elasticity after gum dipping, calendering modified chlorosulfonated polyethylene rubber into sheets, preparing a cord framework material, preparing a tear-resistant layer cloth material and preparing a forming vulcanization mold;

B. a molding procedure: sleeving a gum dipping cloth sleeve on a forming die, winding, and then encapsulating;

C. and (3) a vulcanization procedure: putting the mold into a vulcanizing cylinder, and putting a rubber sleeve outside the mold for vulcanization;

D. a back grinding procedure: placing the molding belt barrel on a back grinding machine, and grinding the thickness of the belt barrel to meet the requirements of a drawing;

E. a cutting procedure: cutting the belt barrel with the ground back according to the width required by the drawing;

F. a length measuring procedure: measuring the effective length of the cut belt;

G. and (3) inspection and packaging: the appearance and size of the belt were inspected and packaged.

Therefore, the invention has the following beneficial effects:

(1) the invention provides a modified CSM (Carrier sense multiple Access) automobile timing belt with strong thermal stability and a preparation method thereof, and the invention modifies chlorosulfonated polyethylene rubber by adding a fusion promoter and an additive component to prepare a timing belt substrate with high elasticity and wear resistance, wherein the substrate has excellent weather resistance and thermal stability;

(2) the thermal stability of the timing belt matrix is improved by adding the fluxing agent with a high softening point group, and the friction coefficient of the timing belt matrix is reduced within a range of ensuring a certain friction force, so that the wear resistance of the timing belt matrix is improved;

(3) the natural green environment-friendly fusion promoter is adopted, no harmful gas is released when the fusion promoter is heated, the body is not damaged, and the fusion promoter has a better environment-friendly effect and meets the pursuit of people for green environment at present.

Drawings

FIG. 1 is an isometric view from an outside perspective of the present invention.

Fig. 2 is an isometric view from an inside perspective of the present invention.

FIG. 3 is a schematic view of the circumferential cross-sectional structure of the present invention.

Fig. 4 is a schematic diagram of the transverse cross-sectional structure of the present invention.

Fig. 5 is a schematic view of the tooth structure of the present invention.

In the figure: 1. a belt body; 2. a tooth body; 3. a cord framework; 4. a tear resistant layer; 5. rubber tooth cloth; 6. and (4) coating the surface of the tooth.

Detailed Description

General examples

The utility model provides a modified CSM automobile timing belt that thermal stability is strong, includes the area body 1 and is located a plurality of tooth bodies 2 of 1 inboard of the area body, the area body 1 with tooth body 2 integrated into one piece, 1 back of the area body is equipped with anti-tear layer 4, a serial communication port, 1 inside edge circumference of the area body is equipped with a plurality of groups line skeleton 3, 2 internal surfaces of the tooth body are equipped with rubber tooth cloth 5, 5 surface coatings on rubber tooth cloth have tooth surface coating 6. The included angle a of the two side surfaces of the tooth body 2 is 26-27 degrees, and the height h of the tooth body 2 is 3.4-3.6 mm; the thickness ratio of the space between the thread rope framework 3 and the belt body 1 is 1: 3-5; the ratio of the distance of the root of the tooth body 2 to the thickness of the belt body 1 is 2: 0.8 to 1; the belt body 1 is made of modified chlorosulfonated polyethylene rubber.

The cord framework 3 is composed of three glass fiber cords which are arranged in a connected mode, and the center point of the cord framework 3 is located at 1/3, which is located at the position, away from the root of the tooth body, of the belt body.

1. Preparing activated lignin: carrying out amplification culture on fomes fomentarius in a culture solution at 30-32 ℃ for two days, then adding sterilized lignin into the culture solution for continuous culture for 10-12h, wherein the rotating speed of a shaking table is 140-;

2. preparing a fusion promoter tung oil-activated lignin modified rosin: (1) putting rosin into a reaction vessel, heating to 170 ℃ for melting, dropwise adding tung oil, continuously reacting for 5.2-6h, then adding ZnO as a catalyst, dropwise adding trimethylolethane, heating to 190 ℃ for reacting for 1-1.2h, and continuously heating to 215 ℃ for reacting for 1.5-2h to obtain a product I; (2) adding activated lignin into the product I, and reacting at 190-; the specific gravity of the rosin, the tung oil, the activated lignin, the ZnO and the trimethylolethane is 8-10 g: 5-7 g: 4-6 g: 0.5-0.6 g: 1-1.5 g.

3. The modified chlorosulfonated polyethylene rubber comprises the following components in parts by mass: 60-90 parts of chlorosulfonated polyethylene rubber, 10-30 parts of modified rubber, 4-6 parts of a fusion promoter, 1-10 parts of aramid short fiber, 1-3 parts of stearic acid, 1-5 parts of 4,4' -dioctyl diphenylamine, 1-5 parts of N, N-di-N-butyl nickel dithiocarbamate, 30-60 parts of N774 carbon black, 3-10 parts of RS107 ester, 3-10 parts of magnesium oxide and 1-10 parts of dicumyl peroxide.

4. The preparation method of the modified CSM automobile timing belt with strong thermal stability comprises the following preparation steps:

A. preparing raw materials in the previous process: preparing rubber tooth cloth by using nylon elasticity after gum dipping, calendering modified chlorosulfonated polyethylene rubber into sheets, preparing a cord framework material, preparing a tear-resistant layer cloth material and preparing a forming vulcanization mold;

B. a molding procedure: sleeving a gum dipping cloth sleeve on a forming die, winding, and then encapsulating;

C. and (3) a vulcanization procedure: putting the mold into a vulcanizing cylinder, and putting a rubber sleeve outside the mold for vulcanization;

D. a back grinding procedure: placing the molding belt barrel on a back grinding machine, and grinding the thickness of the belt barrel to meet the requirements of a drawing;

E. a cutting procedure: cutting the belt barrel with the ground back according to the width required by the drawing;

F. a length measuring procedure: measuring the effective length of the cut belt;

G. and (3) inspection and packaging: the appearance and size of the belt were inspected and packaged.

Example 1

The utility model provides a modified CSM automobile timing belt that thermal stability is strong, includes the area body 1 and is located a plurality of tooth bodies 2 of 1 inboard of the area body, the area body 1 with tooth body 2 integrated into one piece, 1 back of the area body is equipped with anti-tear layer 4, a serial communication port, 1 inside edge circumference of the area body is equipped with a plurality of groups line skeleton 3, 2 internal surfaces of the tooth body are equipped with rubber tooth cloth 5, 5 surface coatings on rubber tooth cloth have tooth surface coating 6. The included angle a of the two side surfaces of the tooth body 2 is 26 degrees, and the height h of the tooth body 2 is 3.5 mm; the thickness ratio of the space between the thread rope framework 3 and the belt body 1 is 1: 4; the ratio of the distance of the root of the tooth body 2 to the thickness of the belt body 1 is 2: 0.9; the belt body 1 is made of modified chlorosulfonated polyethylene rubber.

The cord framework 3 is composed of three glass fiber cords which are arranged in a connected mode, and the center point of the cord framework 3 is located at 1/3, which is located at the position, away from the root of the tooth body, of the belt body.

1. Preparing activated lignin: carrying out amplification culture on fomes fomentarius in a culture solution at 31 ℃ for two days, then adding sterilized lignin into the culture solution for continuous culture for 11 hours, wherein the rotating speed of a shaking table is 150 r/min, and after the fomes fomentarius is subjected to activation treatment, separating activated lignin for later use, wherein the fomes fomentarius accounts for 3% of the weight of the lignin;

2. preparing a fusion promoter tung oil-activated lignin modified rosin: (1) putting rosin into a reaction container, heating to 165 ℃ for melting, dropwise adding tung oil, continuously reacting for 5.6h, then adding ZnO as a catalyst, dropwise adding trimethylolethane, heating to 185 ℃ for reacting for 1.1h, and continuously heating to 210 ℃ for reacting for 1.8h to obtain a product I; (2) adding activated lignin into the product I, and reacting at 195 ℃ for 2.5 hours to obtain a fusion promoter; the specific gravity of the rosin, the tung oil, the activated lignin, the ZnO and the trimethylolethane is 9 g: 6 g: 5 g: 0.55 g: 1.2 g.

3. The modified chlorosulfonated polyethylene rubber comprises the following components in parts by mass: 75 parts of chlorosulfonated polyethylene rubber, 20 parts of modified rubber, 5 parts of a fusion promoter, 5 parts of aramid short fiber, 2 parts of stearic acid, 3 parts of 4,4' -dioctyl diphenylamine, 3 parts of N, N-di-N-butyl nickel dithiocarbamate, 45 parts of N774 carbon black, 7 parts of RS107 ester, 6 parts of magnesium oxide and 6 parts of dicumyl peroxide.

4. The preparation method of the modified CSM automobile timing belt with strong thermal stability comprises the following preparation steps:

A. preparing raw materials in the previous process: preparing rubber tooth cloth by using nylon elasticity after gum dipping, calendering modified chlorosulfonated polyethylene rubber into sheets, preparing a cord framework material, preparing a tear-resistant layer cloth material and preparing a forming vulcanization mold;

B. a molding procedure: sleeving a gum dipping cloth sleeve on a forming die, winding, and then encapsulating;

C. and (3) a vulcanization procedure: putting the mold into a vulcanizing cylinder, and putting a rubber sleeve outside the mold for vulcanization;

D. a back grinding procedure: placing the molding belt barrel on a back grinding machine, and grinding the thickness of the belt barrel to meet the requirements of a drawing;

E. a cutting procedure: cutting the belt barrel with the ground back according to the width required by the drawing;

F. a length measuring procedure: measuring the effective length of the cut belt;

G. and (3) inspection and packaging: the appearance and size of the belt were inspected and packaged.

Example 2

The utility model provides a modified CSM automobile timing belt that thermal stability is strong, includes the area body 1 and is located a plurality of tooth bodies 2 of 1 inboard of the area body, the area body 1 with tooth body 2 integrated into one piece, 1 back of the area body is equipped with anti-tear layer 4, a serial communication port, 1 inside edge circumference of the area body is equipped with a plurality of groups line skeleton 3, 2 internal surfaces of the tooth body are equipped with rubber tooth cloth 5, 5 surface coatings on rubber tooth cloth have tooth surface coating 6. The included angle a of the two side surfaces of the tooth body 2 is 26 degrees, and the height h of the tooth body 2 is 3.6 mm; the thickness ratio of the space between the thread rope framework 3 and the belt body 1 is 1: 3; the ratio of the distance of the root of the tooth body 2 to the thickness of the belt body 1 is 2: 0.8; the belt body 1 is made of modified chlorosulfonated polyethylene rubber.

The cord framework 3 is composed of three glass fiber cords which are arranged in a connected mode, and the center point of the cord framework 3 is located at 1/3, which is located at the position, away from the root of the tooth body, of the belt body.

1. Preparing activated lignin: carrying out amplification culture on fomes fomentarius in a culture solution at 30 ℃ for two days, then adding sterilized lignin into the culture solution for continuous culture for 12 hours, wherein the rotating speed of a shaking table is 140 r/min, and after the fomes fomentarius is subjected to activation treatment, separating activated lignin for later use, wherein the fomes fomentarius accounts for 4% of the weight of the lignin;

2. preparing a fusion promoter tung oil-activated lignin modified rosin: (1) putting rosin into a reaction container, heating to 160 ℃ for melting, dropwise adding tung oil, continuously reacting for 6 hours, then adding ZnO as a catalyst, dropwise adding trimethylolethane, heating to 180 ℃ for reacting for 1.2 hours, and continuously heating to 205 ℃ for reacting for 2 hours to obtain a product I; (2) adding activated lignin into the product I, and reacting for 3h at 190 ℃ to obtain a fusion promoter; the specific gravity of the rosin, the tung oil, the activated lignin, the ZnO and the trimethylolethane is 8 g: 7 g: 4 g: 0.6 g: 1g of the total weight of the composition.

3. The modified chlorosulfonated polyethylene rubber comprises the following components in parts by mass: 60 parts of chlorosulfonated polyethylene rubber, 30 parts of modified rubber, 4 parts of a fusion promoter, 1 part of aramid short fiber, 3 parts of stearic acid, 1 part of 4,4' -dioctyl diphenylamine, 5 parts of N, N-di-N-butyl nickel dithiocarbamate, 30 parts of N774 carbon black, 10 parts of RS107 ester, 3 parts of magnesium oxide and 10 parts of dicumyl peroxide.

4. The preparation method of the modified CSM automobile timing belt with strong thermal stability comprises the following preparation steps:

A. preparing raw materials in the previous process: preparing rubber tooth cloth by using nylon elasticity after gum dipping, calendering modified chlorosulfonated polyethylene rubber into sheets, preparing a cord framework material, preparing a tear-resistant layer cloth material and preparing a forming vulcanization mold;

B. a molding procedure: sleeving a gum dipping cloth sleeve on a forming die, winding, and then encapsulating;

C. and (3) a vulcanization procedure: putting the mold into a vulcanizing cylinder, and putting a rubber sleeve outside the mold for vulcanization;

D. a back grinding procedure: placing the molding belt barrel on a back grinding machine, and grinding the thickness of the belt barrel to meet the requirements of a drawing;

E. a cutting procedure: cutting the belt barrel with the ground back according to the width required by the drawing;

F. a length measuring procedure: measuring the effective length of the cut belt;

G. and (3) inspection and packaging: the appearance and size of the belt were inspected and packaged.

Example 3

The utility model provides a modified CSM automobile timing belt that thermal stability is strong, includes the area body 1 and is located a plurality of tooth bodies 2 of 1 inboard of the area body, the area body 1 with tooth body 2 integrated into one piece, 1 back of the area body is equipped with anti-tear layer 4, a serial communication port, 1 inside edge circumference of the area body is equipped with a plurality of groups line skeleton 3, 2 internal surfaces of the tooth body are equipped with rubber tooth cloth 5, 5 surface coatings on rubber tooth cloth have tooth surface coating 6. The included angle a of the two side surfaces of the tooth body 2 is 27 degrees, and the height h of the tooth body 2 is 3.6 mm; the thickness ratio of the space between the thread rope framework 3 and the belt body 1 is 1: 5; the ratio of the distance of the root of the tooth body 2 to the thickness of the belt body 1 is 2: 1; the belt body 1 is made of modified chlorosulfonated polyethylene rubber.

The cord framework 3 is composed of three glass fiber cords which are arranged in a connected mode, and the center point of the cord framework 3 is located at 1/3, which is located at the position, away from the root of the tooth body, of the belt body.

1. Preparing activated lignin: culturing fomes fomentarius in a culture solution at 32 ℃ for two days in an expanding way, sterilizing lignin, adding the sterilized lignin into the culture solution, and continuously culturing for 10 hours, wherein the rotating speed of a shaking table is 160 r/min, and after the fomes fomentarius is subjected to activation treatment, activated lignin is separated for standby application, and the fomes fomentarius accounts for 2% of the weight of the lignin;

2. preparing a fusion promoter tung oil-activated lignin modified rosin: (1) putting rosin into a reaction container, heating to 160 ℃ for melting, dropwise adding tung oil, continuously reacting for 6 hours, then adding ZnO as a catalyst, dropwise adding trimethylolethane, heating to 180 ℃ for reacting for 1.2 hours, and continuously heating to 205 ℃ for reacting for 1.5-2 hours to obtain a product I; (2) adding activated lignin into the product I, and reacting for 2h at 200 ℃ to obtain a fusion promoter; the specific gravity of the rosin, the tung oil, the activated lignin, the ZnO and the trimethylolethane is 10 g: 5 g: 6 g: 0.5 g: 1.5 g.

3. The modified chlorosulfonated polyethylene rubber comprises the following components in parts by mass: 90 parts of chlorosulfonated polyethylene rubber, 10 parts of modified rubber, 6 parts of a fusion promoter, 1 part of aramid short fiber, 3 parts of stearic acid, 1 part of 4,4' -dioctyl diphenylamine, 5 parts of N, N-di-N-butyl nickel dithiocarbamate, 30 parts of N774 carbon black, 10 parts of RS107 ester, 3 parts of magnesium oxide and 10 parts of dicumyl peroxide.

4. The preparation method of the modified CSM automobile timing belt with strong thermal stability comprises the following preparation steps:

A. preparing raw materials in the previous process: preparing rubber tooth cloth by using nylon elasticity after gum dipping, calendering modified chlorosulfonated polyethylene rubber into sheets, preparing a cord framework material, preparing a tear-resistant layer cloth material and preparing a forming vulcanization mold;

B. a molding procedure: sleeving a gum dipping cloth sleeve on a forming die, winding, and then encapsulating;

C. and (3) a vulcanization procedure: putting the mold into a vulcanizing cylinder, and putting a rubber sleeve outside the mold for vulcanization;

D. a back grinding procedure: placing the molding belt barrel on a back grinding machine, and grinding the thickness of the belt barrel to meet the requirements of a drawing;

E. a cutting procedure: cutting the belt barrel with the ground back according to the width required by the drawing;

F. a length measuring procedure: measuring the effective length of the cut belt;

G. and (3) inspection and packaging: the appearance and size of the belt were inspected and packaged.

Example 4

The utility model provides a modified CSM automobile timing belt that thermal stability is strong, includes the area body 1 and is located a plurality of tooth bodies 2 of 1 inboard of the area body, the area body 1 with tooth body 2 integrated into one piece, 1 back of the area body is equipped with anti-tear layer 4, a serial communication port, 1 inside edge circumference of the area body is equipped with a plurality of groups line skeleton 3, 2 internal surfaces of the tooth body are equipped with rubber tooth cloth 5, 5 surface coatings on rubber tooth cloth have tooth surface coating 6. The included angle a of the two side surfaces of the tooth body 2 is 26.2 degrees, and the height h of the tooth body 2 is 3.5 mm; the thickness ratio of the space between the thread rope framework 3 and the belt body 1 is 1: 4; the ratio of the distance of the root of the tooth body 2 to the thickness of the belt body 1 is 2: 0.9; the belt body 1 is made of modified chlorosulfonated polyethylene rubber.

The cord framework 3 is composed of three glass fiber cords which are arranged in a connected mode, and the center point of the cord framework 3 is located at 1/3, which is located at the position, away from the root of the tooth body, of the belt body.

1. Preparing activated lignin: carrying out amplification culture on fomes fomentarius in a culture solution at the temperature of 30.5 ℃ for two days, then adding sterilized lignin into the culture solution for continuous culture for 11.5 hours, wherein the rotating speed of a shaking table is 145 r/min, and after the fomes fomentarius is subjected to activation treatment, separating activated lignin for later use, wherein the fomes fomentarius accounts for 2.5% of the weight of the lignin;

2. preparing a fusion promoter tung oil-activated lignin modified rosin: (1) putting rosin into a reaction vessel, heating to 162 ℃ for melting, dropwise adding tung oil, continuously reacting for 5.4h, then adding ZnO as a catalyst, dropwise adding trimethylolethane, heating to 182 ℃ for reacting for 1.05h, and continuously heating to 208 ℃ for reacting for 1.6h to obtain a product I; (2) adding activated lignin into the product I, and reacting for 2.8h at 192 ℃ to obtain a fusion promoter; the specific gravity of rosin, tung oil, activated lignin, ZnO and trimethylolethane is 8.5 g: 5.5 g: 4.5 g: 0.52 g: 1.1 g.

3. The modified chlorosulfonated polyethylene rubber comprises the following components in parts by mass: 70 parts of chlorosulfonated polyethylene rubber, 15 parts of modified rubber, 4.5 parts of a fusion promoter, 3 parts of aramid short fiber, 1.5 parts of stearic acid, 2 parts of 4,4' -dioctyl diphenylamine, 2.5 parts of N, N-di-N-butyl nickel dithiocarbamate, 35 parts of N774 carbon black, 5 parts of RS107 ester, 5 parts of magnesium oxide and 3 parts of dicumyl peroxide.

4. The preparation method of the modified CSM automobile timing belt with strong thermal stability comprises the following preparation steps:

A. preparing raw materials in the previous process: preparing rubber tooth cloth by using nylon elasticity after gum dipping, calendering modified chlorosulfonated polyethylene rubber into sheets, preparing a cord framework material, preparing a tear-resistant layer cloth material and preparing a forming vulcanization mold;

B. a molding procedure: sleeving a gum dipping cloth sleeve on a forming die, winding, and then encapsulating;

C. and (3) a vulcanization procedure: putting the mold into a vulcanizing cylinder, and putting a rubber sleeve outside the mold for vulcanization;

D. a back grinding procedure: placing the molding belt barrel on a back grinding machine, and grinding the thickness of the belt barrel to meet the requirements of a drawing;

E. a cutting procedure: cutting the belt barrel with the ground back according to the width required by the drawing;

F. a length measuring procedure: measuring the effective length of the cut belt;

G. and (3) inspection and packaging: the appearance and size of the belt were inspected and packaged.

Example 5

The utility model provides a modified CSM automobile timing belt that thermal stability is strong, includes the area body 1 and is located a plurality of tooth bodies 2 of 1 inboard of the area body, the area body 1 with tooth body 2 integrated into one piece, 1 back of the area body is equipped with anti-tear layer 4, a serial communication port, 1 inside edge circumference of the area body is equipped with a plurality of groups line skeleton 3, 2 internal surfaces of the tooth body are equipped with rubber tooth cloth 5, 5 surface coatings on rubber tooth cloth have tooth surface coating 6. The included angle a of the two side surfaces of the tooth body 2 is 26.8 degrees, and the height h of the tooth body 2 is 3.5 mm; the thickness ratio of the space between the thread rope framework 3 and the belt body 1 is 1: 4.5; the ratio of the distance of the root of the tooth body 2 to the thickness of the belt body 1 is 2: 0.9; the belt body 1 is made of modified chlorosulfonated polyethylene rubber.

The cord framework 3 is composed of three glass fiber cords which are arranged in a connected mode, and the center point of the cord framework 3 is located at 1/3, which is located at the position, away from the root of the tooth body, of the belt body.

1. Preparing activated lignin: carrying out amplification culture on fomes fomentarius in a culture solution at 31.5 ℃ for two days, then adding sterilized lignin into the culture solution for continuous culture for 11.5 hours, wherein the rotating speed of a shaking table is 155 r/min, and after the fomes fomentarius is subjected to activation treatment, separating activated lignin for later use, wherein the fomes fomentarius accounts for 3.5% of the weight of the lignin;

2. preparing a fusion promoter tung oil-activated lignin modified rosin: (1) putting rosin into a reaction vessel, heating to 168 ℃ for melting, dropwise adding tung oil, continuously reacting for 5.8h, then adding ZnO as a catalyst, dropwise adding trimethylolethane, heating to 188 ℃ for reacting for 1.15h, and continuously heating to 212 ℃ for reacting for 1.9h to obtain a product I; (2) adding activated lignin into the product I, and reacting at 198 ℃ for 2.8h to obtain a fusion promoter; the specific gravity of rosin, tung oil, activated lignin, ZnO and trimethylolethane is 9.5 g: 6.5 g: 5.5 g: 0.58 g: 1.4 g.

3. The modified chlorosulfonated polyethylene rubber comprises the following components in parts by mass: 80 parts of chlorosulfonated polyethylene rubber, 25 parts of modified rubber, 5.5 parts of a fusion promoter, 8 parts of aramid short fiber, 2.5 parts of stearic acid, 4,4' -dioctyl diphenylamine, 4 parts of N, N-di-N-butyl nickel dithiocarbamate, 5.5 parts of N774 carbon black, 8 parts of RS107 ester, 9 parts of magnesium oxide and 9 parts of dicumyl peroxide.

4. The preparation method of the modified CSM automobile timing belt with strong thermal stability comprises the following preparation steps:

A. preparing raw materials in the previous process: preparing rubber tooth cloth by using nylon elasticity after gum dipping, calendering modified chlorosulfonated polyethylene rubber into sheets, preparing a cord framework material, preparing a tear-resistant layer cloth material and preparing a forming vulcanization mold;

B. a molding procedure: sleeving a gum dipping cloth sleeve on a forming die, winding, and then encapsulating;

C. and (3) a vulcanization procedure: putting the mold into a vulcanizing cylinder, and putting a rubber sleeve outside the mold for vulcanization;

D. a back grinding procedure: placing the molding belt barrel on a back grinding machine, and grinding the thickness of the belt barrel to meet the requirements of a drawing;

E. a cutting procedure: cutting the belt barrel with the ground back according to the width required by the drawing;

F. a length measuring procedure: measuring the effective length of the cut belt;

G. and (3) inspection and packaging: the appearance and size of the belt were inspected and packaged.

Comparative example 1 (different from example 1 in that chloroprene rubber was used for the belt body)

The utility model provides a chloroprene rubber timing belt, includes the area body 1 and lies in a plurality of tooth bodies 2 of the 1 inboard of area body, the area body 1 with tooth body 2 integrated into one piece, 1 back of the area body is equipped with anti-tear layer 4, a serial communication port, 1 inside edge circumference of the area body is equipped with a plurality of groups line skeleton 3, 2 internal surfaces of tooth body are equipped with rubber tooth cloth 5, 5 surface coatings on rubber tooth cloth have tooth surface coating 6. The included angle a of the two side surfaces of the tooth body 2 is 26 degrees, and the height h of the tooth body 2 is 3.5 mm; the thickness ratio of the space between the thread rope framework 3 and the belt body 1 is 1: 4; the ratio of the distance of the root of the tooth body 2 to the thickness of the belt body 1 is 2: 0.9; the belt body 1 is made of modified chlorosulfonated polyethylene rubber.

The cord framework 3 is composed of three glass fiber cords which are arranged in a connected mode, and the center point of the cord framework 3 is located at 1/3, which is located at the position, away from the root of the tooth body, of the belt body.

4. The preparation method of the chloroprene rubber comprises the following preparation steps:

A. preparing raw materials in the previous process: preparing rubber tooth cloth by nylon elasticity after gum dipping, rolling chloroprene rubber into sheets, preparing a cord framework material, preparing a tear-resistant layer cloth material and preparing a forming vulcanization mold;

B. a molding procedure: sleeving a gum dipping cloth sleeve on a forming die, winding, and then encapsulating;

C. and (3) a vulcanization procedure: putting the mold into a vulcanizing cylinder, and putting a rubber sleeve outside the mold for vulcanization;

D. a back grinding procedure: placing the molding belt barrel on a back grinding machine, and grinding the thickness of the belt barrel to meet the requirements of a drawing;

E. a cutting procedure: cutting the belt barrel with the ground back according to the width required by the drawing;

F. a length measuring procedure: measuring the effective length of the cut belt;

G. and (3) inspection and packaging: the appearance and size of the belt were inspected and packaged.

Comparative example 2 (difference from example 1, no fluxing agent is added to the modified chlorosulfonated polyethylene rubber.) a modified CSM automobile timing belt with strong thermal stability comprises a belt body 1 and a plurality of tooth bodies 2 positioned on the inner side of the belt body 1, wherein the belt body 1 and the tooth bodies 2 are integrally formed, the back of the belt body 1 is provided with an anti-tear layer 4, the modified CSM automobile timing belt is characterized in that a plurality of groups of line frameworks 3 are arranged in the belt body 1 along the circumferential direction, rubber tooth cloth 5 is arranged on the inner surface of each tooth body 2, and a tooth surface coating 6 is coated on the surface of each rubber tooth cloth 5. The included angle a of the two side surfaces of the tooth body 2 is 26 degrees, and the height h of the tooth body 2 is 3.5 mm; the thickness ratio of the space between the thread rope framework 3 and the belt body 1 is 1: 4; the ratio of the distance of the root of the tooth body 2 to the thickness of the belt body 1 is 2: 0.9; the belt body 1 is made of modified chlorosulfonated polyethylene rubber.

The cord framework 3 is composed of three glass fiber cords which are arranged in a connected mode, and the center point of the cord framework 3 is located at 1/3, which is located at the position, away from the root of the tooth body, of the belt body.

3. The modified chlorosulfonated polyethylene rubber comprises the following components in parts by mass: 75 parts of chlorosulfonated polyethylene rubber, 20 parts of modified rubber, 5 parts of aramid short fiber, 2 parts of stearic acid, 3 parts of 4,4' -dioctyl diphenylamine, 3 parts of N, N-di-N-butyl nickel dithiocarbamate, 45 parts of N774 carbon black, 7 parts of RS107 ester, 6 parts of magnesium oxide and 6 parts of dicumyl peroxide.

4. The preparation method of the modified CSM automobile timing belt with strong thermal stability comprises the following preparation steps:

A. preparing raw materials in the previous process: preparing rubber tooth cloth by using nylon elasticity after gum dipping, calendering modified chlorosulfonated polyethylene rubber into sheets, preparing a cord framework material, preparing a tear-resistant layer cloth material and preparing a forming vulcanization mold;

B. a molding procedure: sleeving a gum dipping cloth sleeve on a forming die, winding, and then encapsulating;

C. and (3) a vulcanization procedure: putting the mold into a vulcanizing cylinder, and putting a rubber sleeve outside the mold for vulcanization;

D. a back grinding procedure: placing the molding belt barrel on a back grinding machine, and grinding the thickness of the belt barrel to meet the requirements of a drawing;

E. a cutting procedure: cutting the belt barrel with the ground back according to the width required by the drawing;

F. a length measuring procedure: measuring the effective length of the cut belt;

G. and (3) inspection and packaging: the appearance and size of the belt were inspected and packaged.

Comparative example 3 (different from example 1 in that the excess of the fusion accelerator in example 1 was added to the modified chlorosulfonated polyethylene rubber.)

The utility model provides a modified CSM automobile timing belt that thermal stability is strong, includes the area body 1 and is located a plurality of tooth bodies 2 of 1 inboard of the area body, the area body 1 with tooth body 2 integrated into one piece, 1 back of the area body is equipped with anti-tear layer 4, a serial communication port, 1 inside edge circumference of the area body is equipped with a plurality of groups line skeleton 3, 2 internal surfaces of the tooth body are equipped with rubber tooth cloth 5, 5 surface coatings on rubber tooth cloth have tooth surface coating 6. The included angle a of the two side surfaces of the tooth body 2 is 26 degrees, and the height h of the tooth body 2 is 3.5 mm; the thickness ratio of the space between the thread rope framework 3 and the belt body 1 is 1: 4; the ratio of the distance of the root of the tooth body 2 to the thickness of the belt body 1 is 2: 0.9; the belt body 1 is made of modified chlorosulfonated polyethylene rubber.

The cord framework 3 is composed of three glass fiber cords which are arranged in a connected mode, and the center point of the cord framework 3 is located at 1/3, which is located at the position, away from the root of the tooth body, of the belt body.

1. Preparing activated lignin: carrying out amplification culture on fomes fomentarius in a culture solution at 31 ℃ for two days, then adding sterilized lignin into the culture solution for continuous culture for 11 hours, wherein the rotating speed of a shaking table is 150 r/min, and after the fomes fomentarius is subjected to activation treatment, separating activated lignin for later use, wherein the fomes fomentarius accounts for 3% of the weight of the lignin;

2. preparing a fusion promoter tung oil-activated lignin modified rosin: (1) putting rosin into a reaction container, heating to 165 ℃ for melting, dropwise adding tung oil, continuously reacting for 5.6h, then adding ZnO as a catalyst, dropwise adding trimethylolethane, heating to 185 ℃ for reacting for 1.1h, and continuously heating to 210 ℃ for reacting for 1.8h to obtain a product I; (2) adding activated lignin into the product I, and reacting at 195 ℃ for 2.5 hours to obtain a fusion promoter; the specific gravity of the rosin, the tung oil, the activated lignin, the ZnO and the trimethylolethane is 9 g: 6 g: 5 g: 0.55 g: 1.2 g.

3. The modified chlorosulfonated polyethylene rubber comprises the following components in parts by mass: 75 parts of chlorosulfonated polyethylene rubber, 20 parts of modified rubber, 15 parts of a fusion promoter, 5 parts of aramid short fiber, 2 parts of stearic acid, 3 parts of 4,4' -dioctyl diphenylamine, 3 parts of N, N-di-N-butyl nickel dithiocarbamate, 45 parts of N774 carbon black, 7 parts of RS107 ester, 6 parts of magnesium oxide and 6 parts of dicumyl peroxide.

4. The preparation method of the modified CSM automobile timing belt with strong thermal stability comprises the following preparation steps:

A. preparing raw materials in the previous process: preparing rubber tooth cloth by using nylon elasticity after gum dipping, calendering modified chlorosulfonated polyethylene rubber into sheets, preparing a cord framework material, preparing a tear-resistant layer cloth material and preparing a forming vulcanization mold;

B. a molding procedure: sleeving a gum dipping cloth sleeve on a forming die, winding, and then encapsulating;

C. and (3) a vulcanization procedure: putting the mold into a vulcanizing cylinder, and putting a rubber sleeve outside the mold for vulcanization;

D. a back grinding procedure: placing the molding belt barrel on a back grinding machine, and grinding the thickness of the belt barrel to meet the requirements of a drawing;

E. a cutting procedure: cutting the belt barrel with the ground back according to the width required by the drawing;

F. a length measuring procedure: measuring the effective length of the cut belt;

G. and (3) inspection and packaging: the appearance and size of the belt were inspected and packaged.

Comparative example 4 (different from example 1 in that activated lignin in the fluxing agent was not activated.)

The utility model provides a modified CSM automobile timing belt that thermal stability is strong, includes the area body 1 and is located a plurality of tooth bodies 2 of 1 inboard of the area body, the area body 1 with tooth body 2 integrated into one piece, 1 back of the area body is equipped with anti-tear layer 4, a serial communication port, 1 inside edge circumference of the area body is equipped with a plurality of groups line skeleton 3, 2 internal surfaces of the tooth body are equipped with rubber tooth cloth 5, 5 surface coatings on rubber tooth cloth have tooth surface coating 6. The included angle a of the two side surfaces of the tooth body 2 is 26 degrees, and the height h of the tooth body 2 is 3.5 mm; the thickness ratio of the space between the thread rope framework 3 and the belt body 1 is 1: 4; the ratio of the distance of the root of the tooth body 2 to the thickness of the belt body 1 is 2: 0.9; the belt body 1 is made of modified chlorosulfonated polyethylene rubber.

The cord framework 3 is composed of three glass fiber cords which are arranged in a connected mode, and the center point of the cord framework 3 is located at 1/3, which is located at the position, away from the root of the tooth body, of the belt body.

2. Preparing a fusion promoter tung oil-lignin modified rosin: (1) putting rosin into a reaction container, heating to 165 ℃ for melting, dropwise adding tung oil, continuously reacting for 5.6h, then adding ZnO as a catalyst, dropwise adding trimethylolethane, heating to 185 ℃ for reacting for 1.1h, and continuously heating to 210 ℃ for reacting for 1.8h to obtain a product I; (2) adding lignin into the product I, and reacting at 195 ℃ for 2.5 hours to obtain a fusion promoter; the specific gravity of the rosin, the tung oil, the lignin, the ZnO and the trimethylolethane is 9 g: 6 g: 5 g: 0.55 g: 1.2 g.

3. The modified chlorosulfonated polyethylene rubber comprises the following components in parts by mass: 75 parts of chlorosulfonated polyethylene rubber, 20 parts of modified rubber, 5 parts of a fusion promoter, 5 parts of aramid short fiber, 2 parts of stearic acid, 3 parts of 4,4' -dioctyl diphenylamine, 3 parts of N, N-di-N-butyl nickel dithiocarbamate, 45 parts of N774 carbon black, 7 parts of RS107 ester, 6 parts of magnesium oxide and 6 parts of dicumyl peroxide.

4. The preparation method of the modified CSM automobile timing belt with strong thermal stability comprises the following preparation steps:

A. preparing raw materials in the previous process: preparing rubber tooth cloth by using nylon elasticity after gum dipping, calendering modified chlorosulfonated polyethylene rubber into sheets, preparing a cord framework material, preparing a tear-resistant layer cloth material and preparing a forming vulcanization mold;

B. a molding procedure: sleeving a gum dipping cloth sleeve on a forming die, winding, and then encapsulating;

C. and (3) a vulcanization procedure: putting the mold into a vulcanizing cylinder, and putting a rubber sleeve outside the mold for vulcanization;

D. a back grinding procedure: placing the molding belt barrel on a back grinding machine, and grinding the thickness of the belt barrel to meet the requirements of a drawing;

E. a cutting procedure: cutting the belt barrel with the ground back according to the width required by the drawing;

F. a length measuring procedure: measuring the effective length of the cut belt;

G. and (3) inspection and packaging: the appearance and size of the belt were inspected and packaged.

Comparative example 5 (different from example 4 in that the fluxing agent was replaced with a tung oil-activated lignin-modified rosin)

The utility model provides a modified CSM automobile timing belt that thermal stability is strong, includes the area body 1 and is located a plurality of tooth bodies 2 of 1 inboard of the area body, the area body 1 with tooth body 2 integrated into one piece, 1 back of the area body is equipped with anti-tear layer 4, a serial communication port, 1 inside edge circumference of the area body is equipped with a plurality of groups line skeleton 3, 2 internal surfaces of the tooth body are equipped with rubber tooth cloth 5, 5 surface coatings on rubber tooth cloth have tooth surface coating 6. The included angle a of the two side surfaces of the tooth body 2 is 26 degrees, and the height h of the tooth body 2 is 3.5 mm; the thickness ratio of the space between the thread rope framework 3 and the belt body 1 is 1: 4; the ratio of the distance of the root of the tooth body 2 to the thickness of the belt body 1 is 2: 0.9; the belt body 1 is made of modified chlorosulfonated polyethylene rubber.

The cord framework 3 is composed of three glass fiber cords which are arranged in a connected mode, and the center point of the cord framework 3 is located at 1/3, which is located at the position, away from the root of the tooth body, of the belt body.

1. Preparing activated lignin: carrying out amplification culture on fomes fomentarius in a culture solution at 31 ℃ for two days, then adding sterilized lignin into the culture solution for continuous culture for 11 hours, wherein the rotating speed of a shaking table is 150 r/min, and after the fomes fomentarius is subjected to activation treatment, separating activated lignin for later use, wherein the fomes fomentarius accounts for 3% of the weight of the lignin;

2. preparing fusion promoter tung oil modified rosin: (1) putting rosin into a reaction container, heating to 165 ℃ for melting, dropwise adding tung oil, continuously reacting for 5.6h, then adding a catalyst ZnO, dropwise adding trimethylolethane, heating to 185 ℃ for reacting for 1.1h, and continuously heating to 210 ℃ for reacting for 1.8h to obtain a fusion promoter; the specific gravity of the rosin, the tung oil, the ZnO and the trimethylolethane is 9 g: 6 g: 0.55 g: 1.2 g.

3. The modified chlorosulfonated polyethylene rubber comprises the following components in parts by mass: 75 parts of chlorosulfonated polyethylene rubber, 20 parts of modified rubber, 5 parts of a fusion promoter, 5 parts of aramid short fiber, 2 parts of stearic acid, 3 parts of 4,4' -dioctyl diphenylamine, 3 parts of N, N-di-N-butyl nickel dithiocarbamate, 45 parts of N774 carbon black, 7 parts of RS107 ester, 6 parts of magnesium oxide and 6 parts of dicumyl peroxide.

4. The preparation method of the modified CSM automobile timing belt with strong thermal stability comprises the following preparation steps:

A. preparing raw materials in the previous process: preparing rubber tooth cloth by using nylon elasticity after gum dipping, calendering modified chlorosulfonated polyethylene rubber into sheets, preparing a cord framework material, preparing a tear-resistant layer cloth material and preparing a forming vulcanization mold;

B. a molding procedure: sleeving a gum dipping cloth sleeve on a forming die, winding, and then encapsulating;

C. and (3) a vulcanization procedure: putting the mold into a vulcanizing cylinder, and putting a rubber sleeve outside the mold for vulcanization;

D. a back grinding procedure: placing the molding belt barrel on a back grinding machine, and grinding the thickness of the belt barrel to meet the requirements of a drawing;

E. a cutting procedure: cutting the belt barrel with the ground back according to the width required by the drawing;

F. a length measuring procedure: measuring the effective length of the cut belt;

G. and (3) inspection and packaging: the appearance and size of the belt were inspected and packaged.

Comparative example 6 (different from example 4 in that the fluxing agent was replaced by a tung oil-activated lignin-modified rosin)

The utility model provides a modified CSM automobile timing belt that thermal stability is strong, includes the area body 1 and is located a plurality of tooth bodies 2 of 1 inboard of the area body, the area body 1 with tooth body 2 integrated into one piece, 1 back of the area body is equipped with anti-tear layer 4, a serial communication port, 1 inside edge circumference of the area body is equipped with a plurality of groups line skeleton 3, 2 internal surfaces of the tooth body are equipped with rubber tooth cloth 5, 5 surface coatings on rubber tooth cloth have tooth surface coating 6. The included angle a of the two side surfaces of the tooth body 2 is 26 degrees, and the height h of the tooth body 2 is 3.5 mm; the thickness ratio of the space between the thread rope framework 3 and the belt body 1 is 1: 4; the ratio of the distance of the root of the tooth body 2 to the thickness of the belt body 1 is 2: 0.9; the belt body 1 is made of modified chlorosulfonated polyethylene rubber.

The cord framework 3 is composed of three glass fiber cords which are arranged in a connected mode, and the center point of the cord framework 3 is located at 1/3, which is located at the position, away from the root of the tooth body, of the belt body.

1. Preparing activated lignin: carrying out amplification culture on fomes fomentarius in a culture solution at 31 ℃ for two days, then adding sterilized lignin into the culture solution for continuous culture for 11 hours, wherein the rotating speed of a shaking table is 150 r/min, and after the fomes fomentarius is subjected to activation treatment, separating activated lignin for later use, wherein the fomes fomentarius accounts for 3% of the weight of the lignin;

2. preparing a fluxing agent activated lignin modified rosin: (1) putting rosin into a reaction container, and heating to 165 ℃ for melting; (2) adding activated lignin into the rosin, and reacting for 2.5 hours at 195 ℃ to obtain a fusion promoter; the specific gravity of the rosin, the activated lignin, ZnO and the trimethylolethane is 9 g: 5 g: 0.55 g: 1.2 g.

3. The modified chlorosulfonated polyethylene rubber comprises the following components in parts by mass: 75 parts of chlorosulfonated polyethylene rubber, 20 parts of modified rubber, 5 parts of a fusion promoter, 5 parts of aramid short fiber, 2 parts of stearic acid, 3 parts of 4,4' -dioctyl diphenylamine, 3 parts of N, N-di-N-butyl nickel dithiocarbamate, 45 parts of N774 carbon black, 7 parts of RS107 ester, 6 parts of magnesium oxide and 6 parts of dicumyl peroxide.

4. The preparation method of the modified CSM automobile timing belt with strong thermal stability comprises the following preparation steps:

A. preparing raw materials in the previous process: preparing rubber tooth cloth by using nylon elasticity after gum dipping, calendering modified chlorosulfonated polyethylene rubber into sheets, preparing a cord framework material, preparing a tear-resistant layer cloth material and preparing a forming vulcanization mold;

B. a molding procedure: sleeving a gum dipping cloth sleeve on a forming die, winding, and then encapsulating;

C. and (3) a vulcanization procedure: putting the mold into a vulcanizing cylinder, and putting a rubber sleeve outside the mold for vulcanization;

D. a back grinding procedure: placing the molding belt barrel on a back grinding machine, and grinding the thickness of the belt barrel to meet the requirements of a drawing;

E. a cutting procedure: cutting the belt barrel with the ground back according to the width required by the drawing;

F. a length measuring procedure: measuring the effective length of the cut belt;

G. and (3) inspection and packaging: the appearance and size of the belt were inspected and packaged.

Performance test:

the examples 1 to 5 and the comparative examples 1 to 6 were subjected to performance tests in accordance with the relevant standards GB3512-83 rubber hot air aging test method and FED007-2014 automobile synchronous belt flexure test method, OBJECT 20140101, respectively, and the test results are shown in Table 1.

Table 1 items and prepared modified CSM automobile timing belt physical indexes with strong thermal stability

And (4) conclusion: the data of the embodiment and the comparative example show that the parameter performance of the modified CSM automobile timing belt with strong thermal stability obtained within the ranges of the filler addition component, the addition content and the preparation sequence protected by the invention is superior to that of the surface layer material prepared within the parameter range not strictly defined according to the protection range of the invention, and the embodiment 1-5 shows that the modified CSM automobile timing belt with strong thermal stability prepared by the method has stronger bonding strength, stronger ageing resistance, higher thermal stability and wear resistance index and lower elongation at break.

Comparative example 1 differs from example 1 in that the belt body is made of neoprene; first, the reinforcing material and the dispersant added in example 1 were absent, and secondly, chloroprene rubber was inferior to chlorosulfonated polyethylene rubber in heat resistance, so that the belt body prepared was inferior in performance parameters to those in example 1.

Comparative example 2 differs from example 1 in that no fluxing agent was added to the modified chlorosulfonated polyethylene rubber; the fusion promoter can increase the compatibility, the fluidity and the mixing uniformity of chlorosulfonated polyethylene rubber and other added components, and simultaneously introduces a high-thermal-stability annular structure, and the related performance parameters of the fusion promoter are reduced compared with those of the embodiment 1 without adding the fusion promoter.

Comparative example 3 is different from example 1 in that the modified chlorosulfonated polyethylene rubber was added with the fluxing agent in an excess amount as in example 1; the mechanical property of the whole modified chlorosulfonated polyethylene rubber is reduced due to the fact that too much fusion promoter is added, excessive chemical bonding bonds are generated in the matrix material after the fusion promoter contains many active reaction groups, the brittleness of the matrix material is improved, and related properties are reduced.

Comparative example 4 differs from example 1 in that the activated lignin in the fluxing agent is not activated; the molecular weight and volume of the unactivated lignin are large, the hydroxyl content on the molecular structure is limited, the lignin is not beneficial to the uniform fusion and reaction of the lignin and other components, and the flow and compatibility of the lignin to the added components in the modified chlorosulfonated polyethylene rubber cannot be effectively promoted, so that the related performance parameters are reduced.

Comparative example 5 differs from example 1 in that the fluxing agent was replaced with a tung oil-activated lignin-modified rosin; comparative example 6 differs from example 1 in that the fluxing agent was replaced by tung oil-activated lignin-modified rosin to activated lignin-modified rosin; from comparative examples 5-6, it appears that the tung oil-activated lignin modified rosin is an effective and established body, and the performance parameters of the prepared timing belt body are reduced no matter which component is lacked, because the lignin is an amorphous polymer formed by connecting phenylpropane units through carbon-carbon bonds and ether bonds, the lignin is mainly positioned between cellulose fibers, and because the lignin and the cellulose are always strong in mutual connecting capacity and have the compression resistance effect, the lignin and other macromolecular components also have strong penetration connecting effect, and the tightness of the surface layer material can be enhanced; the flexible molecular chain in the tung oil occupies a large proportion, the compatibility of the molecular structure of the tung oil with other components is obviously increased, the breaking strength and the thermal stability of a surface layer material are further improved, the overall weather resistance of a rubber matrix is further improved, the tung oil also has a good lubricating effect, and the tung oil contributes to reducing the friction coefficient of the rubber matrix and improving the flow fusion capacity of added components under the condition of ensuring the support acting force.

From the data of examples 1-5 and comparative examples 1-6, it is clear that only the solutions within the scope of the claims of the present invention are able to satisfy the above requirements in all respects, leading to a solution for the preparation of a modified CSM automotive timing belt with high thermal stability. The change of the mixture ratio, the replacement/addition/subtraction of raw materials or the change of the feeding sequence can bring corresponding negative effects.

The raw materials and equipment used in the invention are common raw materials and equipment in the field if not specified; the methods used in the present invention are conventional in the art unless otherwise specified.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, alterations and equivalents of the above embodiments according to the technical spirit of the present invention are still within the protection scope of the technical solution of the present invention.