阅读说明：本技术 汽车油管用耐高温耐油弹性体及其制备方法 (High-temperature-resistant oil-resistant elastomer for automobile oil pipe and preparation method thereof ) 是由 夏玉洁 曹春林 王江玉 吴章柱 黄慧 于 2020-06-29 设计创作，主要内容包括：本发明公开了一种汽车油管用耐高温耐油弹性体及其制备方法,该耐高温耐油弹性体的原料包括增韧母料、耐油母料,增韧母料的使用提高了弹性体的韧性、抗拉性能、断裂性能,耐油母料的使用提高了弹性体的耐油性能和耐高温性能,使得得到的弹性体具有优良的增塑和耐油效果,而且还能保持良好的力学性能；该制备方法中通过使用物料粉碎装置制备增韧母料、耐油母料,通过将辐照后增韧料条或者耐油料条粉碎,在筛板和粉碎板的配合下,保证了得到的增韧母料、耐油母料两种母料均为60目以下的粉末,能保证其均匀分散于热塑性树脂中,进一步的提高了该弹性体的增塑和耐油效果,提高了该弹性体的品质,提高了生产的汽车油管的使用寿命。(The invention discloses a high-temperature-resistant oil-resistant elastomer for an automobile oil pipe and a preparation method thereof, wherein the raw materials of the high-temperature-resistant oil-resistant elastomer comprise toughening master batch and oil-resistant master batch, the toughening master batch is used for improving the toughness, tensile property and fracture property of the elastomer, and the oil-resistant master batch is used for improving the oil resistance and high-temperature resistance of the elastomer, so that the obtained elastomer has excellent plasticizing and oil resistance effects and can also keep good mechanical property; according to the preparation method, the toughening master batch and the oil-resistant master batch are prepared by using the material crushing device, the toughening material strips or the oil-resistant material strips after irradiation are crushed, and under the matching of the sieve plate and the crushing plate, the obtained toughening master batch and the oil-resistant master batch are both powder with the particle size of less than 60 meshes, so that the toughening master batch and the oil-resistant master batch can be uniformly dispersed in thermoplastic resin, the plasticizing and oil-resistant effects of the elastomer are further improved, the quality of the elastomer is improved, and the service life of the produced automobile oil pipe is prolonged.)

1. The high-temperature-resistant oil-resistant elastomer for the automobile oil pipe is characterized by being prepared from the following components in parts by weight:

8-10 parts of toughening master batch, 20-30 parts of oil-resistant master batch, 5-8 parts of polypropylene powder and 40-50 parts of nitrile rubber powder;

the toughening master batch is prepared from the following components in parts by weight:

10-20 parts of linear low-density polyethylene, 30-40 parts of methyl vinyl silicone rubber, 30-40 parts of a toughening agent, 1-2 parts of an irradiation crosslinking assistant and 10-15 parts of a reinforcing agent;

the oil-resistant master batch is prepared from the following components in parts by weight:

80-100 parts of nitrile silicone rubber, 3-5 parts of lubricant, 10-20 parts of reinforcing agent, 10-20 parts of filler, 1-2 parts of irradiation crosslinking assistant and 3-5 parts of heat-resistant assistant;

the high-temperature-resistant oil-resistant elastomer for the automobile oil pipe is prepared by the following steps:

step one, preparing a toughening master batch: adding linear low-density polyethylene, methyl vinyl silicone rubber, a toughening agent, an irradiation crosslinking assistant and a reinforcing agent into an internal mixer according to parts by weight, discharging into a single-screw extruder after internal mixing for extrusion and bracing, winding and collecting to obtain toughening material strips, irradiating the toughening material strips by using an electron accelerator, and crushing the toughening material strips into powder with the fineness of less than 60 meshes to obtain toughening master batch;

step two, preparing the oil-resistant master batch: adding nitrile silicone rubber, a lubricant, a reinforcing agent, a filler, an irradiation crosslinking assistant and a heat-resistant assistant into an internal mixer according to parts by weight, discharging into a rubber extruder after internal mixing for extrusion and bracing, winding and collecting to obtain an oil-resistant material strip, irradiating the oil-resistant material strip by using an electron accelerator, and then crushing the oil-resistant material strip into powder with the fineness of less than 60 meshes to obtain an oil-resistant master batch;

step three, preparing the high-temperature-resistant oil-resistant elastomer for the automobile oil pipe: adding polypropylene powder, nitrile rubber powder, toughening master batch and oil-resistant master batch into a high-speed mixer according to parts by weight, mixing for 3-5 min, after uniform mixing, discharging into a parallel double-screw extruder, carrying out melt extrusion, bracing and granulating to obtain material particles, then dehydrating and drying the material particles to obtain the high-temperature-resistant oil-resistant elastomer for the automobile oil pipe.

2. The high-temperature-resistant oil-resistant elastomer for the auto oil pipe as claimed in claim 1, wherein the polypropylene powder is polypropylene resin, the toughening agent is acrylate rubber, the irradiation crosslinking assistant is triallyl isocyanurate, the reinforcing agent is white carbon black, the lubricant is methyl phenyl silicone oil, the filler is magnesium hydroxide, and the heat-resistant assistant is ferric oxide.

3. The high-temperature-resistant oil-resistant elastomer for the automobile oil pipe as claimed in claim 1, wherein the banburying temperature of a banbury mixer in the step of preparing the toughening master batch is 85-95 ℃, the banburying time is 7-8 min, and the irradiation dose is 14-16 mrads.

4. The high-temperature-resistant oil-resistant elastomer for the automobile oil pipe as claimed in claim 1, wherein the banburying temperature of a banbury mixer in the step of preparing the oil-resistant master batch is 75-85 ℃, the banburying time is 5-6 min, and the irradiation dose is 14-16 mrads.

5. The preparation method of the high-temperature-resistant oil-resistant elastomer for the automobile oil pipe is characterized by comprising the following steps of:

step one, preparing a toughening master batch: adding linear low-density polyethylene, methyl vinyl silicone rubber, a toughening agent, an irradiation crosslinking assistant and a reinforcing agent into an internal mixer according to parts by weight, discharging into a single-screw extruder after internal mixing for extrusion and bracing, winding and collecting to obtain a toughened material strip, irradiating the toughened material strip by using an electronic accelerator, then adding the irradiated toughened material strip into a crushing bin (102) from a feed hopper (101) of a material crushing device, realizing that crushing blades (120) of a plurality of crushing plates (115) circularly pass through an area between adjacent crushing convex nails (118) through the operation of a driving motor (106), and crushing the irradiated toughened material strip into powder with the fineness below 60 meshes under the combined action of the crushing blades (120) and the crushing convex nails (118) to obtain a toughened master batch;

step two, preparing the oil-resistant master batch: nitrile silicone rubber, a lubricant, a reinforcing agent, a filler, an irradiation crosslinking assistant and a heat-resistant assistant are added into an internal mixer according to parts by weight, the mixture is discharged into a rubber extruder after internal mixing for extrusion and bracing, an oil-resistant material strip is obtained after winding and reeling, an electron accelerator is used for irradiating the oil-resistant material strip, the irradiated oil-resistant material strip is added into a crushing bin (102) from a feed hopper (101) of a material crushing device, and the irradiated oil-resistant material strip is crushed into powder with the fineness of less than 60 meshes under the combined action of a crushing blade (120) and a crushing convex nail (118), so that oil-resistant master batch is obtained;

step three, preparing the high-temperature-resistant oil-resistant elastomer for the automobile oil pipe: adding polypropylene powder, nitrile rubber powder, toughening master batch and oil-resistant master batch into a high-speed mixer according to parts by weight, mixing for 3-5 min, after uniform mixing, discharging into a parallel double-screw extruder, carrying out melt extrusion, bracing and granulating to obtain material particles, then dehydrating and drying the material particles to obtain the high-temperature-resistant oil-resistant elastomer for the automobile oil pipe.

6. The preparation method of the high-temperature-resistant oil-resistant elastomer for the auto oil pipe as claimed in claim 5, wherein the working process of the material crushing device is as follows:

the method comprises the following steps: adding the irradiated toughened material strips or oil-resistant material strips into a crushing bin (102) from a feed hopper (101), starting a driving motor (106), driving a driving belt pulley (111) to rotate by the operation of the driving motor (106), and driving a rotating main shaft (113) to rotate by a belt and a driven belt pulley (112);

step two: the rotating main shaft (113) drives the mounting plate (114) to rotate, so that the grinding blades (120) of a plurality of grinding plates (115) circularly pass through the area between adjacent grinding convex nails (118), the irradiated toughening material strips or oil-resistant material strips are ground under the combined action of the grinding blades (120) and the grinding convex nails (118) until the toughening material strips or the oil-resistant material strips are ground into powder, the powder passes through a plurality of sieve holes (117) on the sieve plate (116) and falls into the inner cavity of the storage box (104) to be stored, and corresponding toughening master batch or oil-resistant master batch is obtained.

Technical Field

The invention relates to the field of automobile oil pipe raw materials, in particular to a high-temperature-resistant oil-resistant elastomer for an automobile oil pipe and a preparation method thereof.

Background

The automobile oil pipe usually adopts a thermoplastic elastomer as a raw material, the thermoplastic elastomer is also called artificial rubber or synthetic rubber, and the product has the excellent performances of high elasticity, aging resistance and oil resistance of the traditional cross-linked vulcanized rubber, and has the characteristics of convenient processing and wide processing mode of common plastics; the thermoplastic elastomer can be produced by processing modes such as injection molding, extrusion, blow molding and the like, so that the processing process is simplified, and the processing cost is reduced, therefore, the thermoplastic elastomer becomes the latest material for replacing the traditional rubber, is environment-friendly, nontoxic, comfortable in hand feeling and exquisite in appearance, and makes the product more creative. Therefore, the material is a novel synthetic material with more humanization and high grade, and is also a worldwide standard environment-friendly material.

The automobile oil pipe directly works in a high-temperature oil environment, but the currently used common thermoplastic elastomer cannot meet the harsh use conditions due to poor heat resistance, oil resistance and solvent resistance, and in the preparation process of the existing high-temperature resistant oil-resistant elastomer, raw materials are required to be crushed and then mixed, so that the crushing effect is poor, the uniformity is low, the produced automobile oil pipe is easy to cause poor quality, and the service life is short.

Therefore, how to improve the problems of poor heat resistance, oil resistance and solvent resistance and low service life of the existing automobile oil pipe is the problem to be solved by the invention.

Disclosure of Invention

In order to overcome the technical problems, the invention aims to provide a high-temperature-resistant oil-resistant elastomer for an automobile oil pipe and a preparation method thereof, wherein the high-temperature-resistant oil-resistant elastomer comprises the following steps: (1) the elastomer is prepared by using toughening master batch and oil-resistant master batch as main raw materials, the toughening master batch is prepared from linear low-density polyethylene, methyl vinyl silicone rubber, a toughening agent, an irradiation crosslinking assistant and a reinforcing agent, the toughness, the tensile property and the fracture property of the elastomer are improved by using the toughening master batch, the oil-resistant master batch is prepared from nitrile silicone rubber, a lubricant, the reinforcing agent, a filler, the irradiation crosslinking assistant and a heat-resistant assistant, the oil-resistant performance and the high-temperature resistance of the elastomer are improved by using the oil-resistant master batch, and the problem that the existing automobile oil pipe is poor in heat resistance, oil resistance and solvent resistance is solved; (2) add into smashing the storehouse through the feeder hopper that will toughen the material strip behind the irradiation or resistant oily material strip follows the material crushing device, the crushing cutting edge circulation that has realized a plurality of crushing board through the driving motor operation passes the region between the adjacent crushing protruding nail, under the combined action of crushing cutting edge and crushing protruding nail, toughen the material strip behind the irradiation or resistant oily material strip is smashed, until smashing into the powder, the powder passes in a plurality of sieve mesh on the sieve, drop to and store in the storage case inner chamber, obtain corresponding toughening masterbatch or resistant oily masterbatch, the problem that current car oil pipe life is low has been solved.

The purpose of the invention can be realized by the following technical scheme:

the high-temperature-resistant oil-resistant elastomer for the automobile oil pipe is prepared from the following components in parts by weight:

8-10 parts of toughening master batch, 20-30 parts of oil-resistant master batch, 5-8 parts of polypropylene powder and 40-50 parts of nitrile rubber powder;

the toughening master batch is prepared from the following components in parts by weight:

10-20 parts of linear low-density polyethylene, 30-40 parts of methyl vinyl silicone rubber, 30-40 parts of a toughening agent, 1-2 parts of an irradiation crosslinking assistant and 10-15 parts of a reinforcing agent;

the oil-resistant master batch is prepared from the following components in parts by weight:

80-100 parts of nitrile silicone rubber, 3-5 parts of lubricant, 10-20 parts of reinforcing agent, 10-20 parts of filler, 1-2 parts of irradiation crosslinking assistant and 3-5 parts of heat-resistant assistant;

the high-temperature-resistant oil-resistant elastomer for the automobile oil pipe is prepared by the following steps:

step one, preparing a toughening master batch: adding linear low-density polyethylene, methyl vinyl silicone rubber, a toughening agent, an irradiation crosslinking assistant and a reinforcing agent into an internal mixer according to parts by weight, discharging into a single-screw extruder after internal mixing for extrusion and bracing, winding and collecting to obtain toughening material strips, irradiating the toughening material strips by using an electron accelerator, and crushing the toughening material strips into powder with the fineness of less than 60 meshes to obtain toughening master batch;

step two, preparing the oil-resistant master batch: adding nitrile silicone rubber, a lubricant, a reinforcing agent, a filler, an irradiation crosslinking assistant and a heat-resistant assistant into an internal mixer according to parts by weight, discharging into a rubber extruder after internal mixing for extrusion and bracing, winding and collecting to obtain an oil-resistant material strip, irradiating the oil-resistant material strip by using an electron accelerator, and then crushing the oil-resistant material strip into powder with the fineness of less than 60 meshes to obtain an oil-resistant master batch;

step three, preparing the high-temperature-resistant oil-resistant elastomer for the automobile oil pipe: adding polypropylene powder, nitrile rubber powder, toughening master batch and oil-resistant master batch into a high-speed mixer according to parts by weight, mixing for 3-5 min, after uniform mixing, discharging into a parallel double-screw extruder, carrying out melt extrusion, bracing and granulating to obtain material particles, then dehydrating and drying the material particles to obtain the high-temperature-resistant oil-resistant elastomer for the automobile oil pipe.

As a further scheme of the invention: the polypropylene powder is polypropylene resin, the toughening agent is acrylate rubber, the irradiation crosslinking assistant is triallyl isocyanurate, the reinforcing agent is white carbon black, the lubricant is methyl phenyl silicone oil, the filler is magnesium hydroxide, and the heat-resistant assistant is ferric oxide.

As a further scheme of the invention: the banburying temperature of the banbury mixer in the step of preparing the toughening master batch is 85-95 ℃, the banburying time is 7-8 min, and the irradiation dose is 14-16 megarads.

As a further scheme of the invention: the banburying temperature of the banbury mixer in the step of preparing the oil-resistant master batch is 75-85 ℃, the banburying time is 5-6 min, and the irradiation dose is 14-16 megarads.

As a further scheme of the invention: the preparation method of the high-temperature-resistant oil-resistant elastomer for the automobile oil pipe comprises the following steps:

step one, preparing a toughening master batch: adding linear low-density polyethylene, methyl vinyl silicone rubber, a toughening agent, an irradiation crosslinking assistant and a reinforcing agent into an internal mixer according to parts by weight, discharging into a single-screw extruder after internal mixing for extrusion and bracing, winding and collecting to obtain toughening material strips, irradiating the toughening material strips by using an electronic accelerator, adding the irradiated toughening material strips into a crushing bin from a feed hopper of a material crushing device, realizing that crushing blades of a plurality of crushing plates circularly pass through an area between adjacent crushing convex nails by running a driving motor, and crushing the irradiated toughening material strips into powder with the fineness of below 60 meshes under the combined action of the crushing blades and the crushing convex nails to obtain toughening master batch;

step two, preparing the oil-resistant master batch: adding nitrile silicone rubber, a lubricant, a reinforcing agent, a filler, an irradiation crosslinking assistant and a heat-resistant assistant into an internal mixer according to parts by weight, discharging into a rubber extruder after internal mixing for extrusion and bracing, winding and collecting to obtain an oil-resistant material strip, irradiating the oil-resistant material strip by using an electronic accelerator, adding the irradiated oil-resistant material strip into a crushing bin from a feed hopper of a material crushing device, and crushing the irradiated oil-resistant material strip into powder with the fineness of below 60 meshes under the combined action of a crushing blade and a crushing convex nail to obtain an oil-resistant master batch;

step three, preparing the high-temperature-resistant oil-resistant elastomer for the automobile oil pipe: adding polypropylene powder, nitrile rubber powder, toughening master batch and oil-resistant master batch into a high-speed mixer according to parts by weight, mixing for 3-5 min, after uniform mixing, discharging into a parallel double-screw extruder, carrying out melt extrusion, bracing and granulating to obtain material particles, then dehydrating and drying the material particles to obtain the high-temperature-resistant oil-resistant elastomer for the automobile oil pipe.

As a further scheme of the invention: the working process of the material crushing device is as follows:

the method comprises the following steps: adding the irradiated toughened material strips or oil-resistant material strips into a crushing bin from a feed hopper, starting a driving motor, driving a driving belt pulley to rotate by the operation of the driving motor, and driving a rotating main shaft to rotate by a belt and a driven belt pulley;

step two: the main shaft that rotates drives the mounting panel and rotates to the crushing cutting edge circulation that has realized a plurality of crushing board passes the region between the adjacent protruding nail of smashing, under the combined action of crushing cutting edge and smashing the protruding nail, will toughen behind the irradiation material strip or resistant oily material strip smashes, until smashing into the powder, and the powder passes in a plurality of sieve mesh on the sieve, falls to storage case inner chamber and stores, obtains corresponding toughening masterbatch or resistant oily masterbatch.

The invention has the beneficial effects that:

(1) the invention relates to a preparation method of a high-temperature-resistant and oil-resistant elastomer for an automobile oil pipe, which comprises the following raw materials of a toughening master batch and an oil-resistant master batch, wherein the toughening master batch is prepared from linear low-density polyethylene, methyl vinyl silicone rubber, a toughening agent, an irradiation crosslinking assistant and a reinforcing agent;

the high-temperature-resistant oil-resistant elastomer for the automobile oil pipe is subjected to performance detection, and the detection result is as follows: the tensile strength is 12-15MPa, and the breaking elongation is 580-630%; oil resistance: the change rate of elongation at break after oil resistance is +/-14-19 percent, and the change rate of tensile strength after oil resistance is +/-13-20 percent; thermal aging test: the change rate of the tensile strength after aging is +/-16-18 percent, and the change rate of the elongation at break after aging is +/-15-16 percent;

(2) according to the preparation method of the high-temperature-resistant oil-resistant elastomer for the automobile oil pipe, the toughening master batch and the oil-resistant master batch are prepared by using the material crushing device, the toughening material strips or the oil-resistant material strips after irradiation are added into a crushing bin from a feed hopper, the driving motor is started, the driving motor is operated to drive the driving belt pulley to rotate, the rotating main shaft is driven to rotate by the belt and the driven belt pulley, and the rotating main shaft drives the mounting plate to rotate, so that the crushing blades of a plurality of crushing plates circularly pass through the area between adjacent crushing convex nails, and under the combined action of the crushing blades and the crushing convex nails, the toughening material strips or the oil-resistant material strips after irradiation are crushed until the toughening material strips or the oil-resistant material strips are crushed into powder which passes through a plurality of sieve holes on the sieve plate and falls into the inner cavity of the storage; this material crushing device is through toughening the material strip or resistant oily material strip after will irradiating smashes, through the cooperation of sieve and crushing board, has guaranteed that two kinds of masterbatches of toughening masterbatch, resistant oily masterbatch that obtain are the powder below 60 meshes, can guarantee its homodisperse in thermoplastic resin, plays good plasticization and resistant oily effect, has further improved this auto oil pipe with the quality of high temperature resistant oily elastomer, has improved the life of the auto oil pipe of production.

Drawings

The invention will be further described with reference to the accompanying drawings.

FIG. 1 is a first perspective view of the material reducing apparatus of the present invention;

FIG. 2 is a second perspective view of the material crushing apparatus of the present invention;

FIG. 3 is a schematic view of the internal structure of the mounting box and the power box of the present invention;

FIG. 4 is a schematic view of the internal structure of the pulverizing bin of the present invention;

fig. 5 is a schematic view of the structure of a screen plate in the present invention;

FIG. 6 is a side view of the mounting plate of the present invention;

FIG. 7 is a front view of the pulverizing plate of the present invention.

In the figure: 101. a feed hopper; 102. a crushing bin; 103. installing a box; 104. a material storage box; 105. a mounting frame; 106. a drive motor; 107. a power box; 108. a material taking port; 109. a bearing seat; 110. a weight wheel; 111. a drive pulley; 112. a driven pulley; 113. rotating the main shaft; 114. mounting a plate; 115. a crushing plate; 116. a sieve plate; 117. screening holes; 118. crushing the convex nails; 119. a tip mounting area; 120. and crushing the blades.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.