阅读说明：本技术 一种再生橡胶及其制备方法和应用 (Reclaimed rubber and preparation method and application thereof ) 是由 沈庆龙 鞠岑 叶家坤 陈新杰 王亚静 孙九光 于 2020-12-28 设计创作，主要内容包括：本发明涉及一种再生橡胶及其制备方法和应用,所述再生橡胶的制备原料按照重量份数包括如下组分：废弃橡胶100份,磺酸盐减水剂3-4份,交联剂2-3份,促进剂3-4份,软化油1-3份,均匀剂1-3份,活化剂0.5-5份和硫化剂0.5-2份。所述再生橡胶具有较高的拉伸强度和断裂伸长率,耐老化性能优异,在硬度、拉伸强度、断裂伸长率和耐老化性这些方面均符合生产需求。(The invention relates to a regenerated rubber and a preparation method and application thereof, wherein the preparation raw materials of the regenerated rubber comprise the following components in parts by weight: 100 parts of waste rubber, 3-4 parts of a sulfonate water reducing agent, 2-3 parts of a cross-linking agent, 3-4 parts of an accelerator, 1-3 parts of softening oil, 1-3 parts of a homogenizing agent, 0.5-5 parts of an activating agent and 0.5-2 parts of a vulcanizing agent. The regenerated rubber has high tensile strength and elongation at break and excellent aging resistance, and meets the production requirements in the aspects of hardness, tensile strength, elongation at break and aging resistance.)

1. The regenerated rubber is characterized by comprising the following raw materials in parts by weight: 100 parts of waste rubber, 3-4 parts of a sulfonate water reducing agent, 2-3 parts of a cross-linking agent, 3-4 parts of an accelerator, 1-3 parts of softening oil, 1-3 parts of a homogenizing agent, 0.5-5 parts of an activating agent and 0.5-2 parts of a vulcanizing agent.

2. The reclaimed rubber of claim 1, wherein the sulfonate water reducer comprises a sulfamate water reducer;

preferably, the crosslinking agent comprises tetraethylenepentamine;

preferably, the accelerator comprises hexamethylenetetramine;

preferably, the homogenizing agent comprises a combination of a saturated fatty acid, a zinc salt of an unsaturated fatty acid mixture, and a higher fatty alcohol;

preferably, the activator comprises zinc oxide and/or stearic acid, preferably a combination of zinc oxide and stearic acid;

preferably, the weight part of the zinc oxide in the regenerated rubber is 2-4 parts;

preferably, the weight part of the stearic acid in the regenerated rubber is 0.5-1 part;

preferably, the vulcanizing agent comprises sulphur.

3. The reclaimed rubber according to claim 1 or 2, wherein the raw materials for preparing the reclaimed rubber comprise the following components in parts by weight: 100 parts of waste rubber, 3-4 parts of a sulfonate water reducing agent, 2-3 parts of tetraethylenepentamine, 3-4 parts of hexamethylenetetramine, 1-3 parts of softening oil, 1-3 parts of a homogenizing agent, 2-4 parts of zinc oxide, 0.5-1 part of stearic acid and 0.5-2 parts of a vulcanizing agent.

4. A process for the preparation of a reclaimed rubber according to any one of claims 1 to 3, characterized in that the process comprises the steps of: mixing and plasticizing the waste rubber, the sulfonate water reducing agent, the crosslinking agent, the accelerator, the softening oil and the homogenizing agent according to the formula amount, and then mixing the activating agent and the vulcanizing agent according to the formula amount with the plasticized rubber material to obtain the regenerated rubber.

5. The method of manufacturing according to claim 4, further comprising: before the mixing and plasticizing, the surface of the waste rubber is cleaned, crushed and naturally dried;

preferably, the particle size of the crushed waste rubber is 40-60 meshes.

6. The method according to claim 4 or 5, characterized in that the plasticizing comprises in particular: heating and stirring the crushed waste rubber, the sulfonate water reducer, the crosslinking agent, the accelerator, the softening oil and the homogenizing agent for the first time to complete plasticization;

preferably, the heating temperature is 80-90 ℃;

preferably, the rotation speed of the first stirring is 900-;

preferably, the time of the first stirring is 5-7 min.

7. The production method according to any one of claims 4 to 6, wherein the post-plasticization secondary stirring is cooled;

preferably, the cooling is performed in a cooling device;

preferably, the rotation speed of the second stirring is 30-40 r/min;

preferably, the temperature at the end of the cooling is 30-35 ℃.

8. The method for the preparation according to any one of claims 4 to 7, characterized in that the mixing is carried out in a twin-screw extruder;

preferably, the temperature of the rubber is 70-80 ℃;

preferably, the time for mixing the rubber is 10-12 min.

9. The method according to any one of claims 4 to 8, characterized by comprising the steps of:

(1) cleaning the surface of the waste rubber, crushing the waste rubber into rubber particles of 40-60 meshes, and naturally drying the rubber particles;

(2) then stirring and heating the crushed waste rubber, the sulfonate water reducing agent, the crosslinking agent, the accelerant, the softening oil and the homogenizing agent under the conditions of 900-1000r/min and 80-90 ℃ to finish plasticizing;

(3) then cooling the plasticized rubber material to 30-35 ℃ in a cooling device at the rotating speed of 30-40 r/min;

(4) and finally, transferring the cooled rubber material to a double-screw extruder, adding an activating agent and a vulcanizing agent, and mixing for 10-12min at the temperature of 70-80 ℃ to obtain the regenerated rubber.

10. A conveyor belt comprising the reclaimed rubber of any of claims 1-3.

Technical Field

The invention relates to the technical field of rubber materials, in particular to regenerated rubber and a preparation method and application thereof.

Background

With the development of industrial and modern civilization, the treatment of various industrial and domestic wastes has become a great problem, especially for chemically crosslinked rubber, because it has a crosslinked network structure inside, and thus is insoluble and infusible. At present, rubber products are widely applied to every corner in mass life, and if the rubber products are not properly treated after use, serious pollution can be brought to the environment, and the difficulties and the problems of developing a waste rubber recycling channel and reducing garbage discharge are discussed, so that the recycling treatment and the recycling of the waste rubber are very worth considering.

CN109734978A discloses a waste rubber tire recycling product and a method thereof, wherein the waste rubber tire recycling product disclosed by the invention is made of the following materials in parts by weight: 12 parts of rubber tire treatment substance, 9 parts of nitrile rubber, 4 parts of straw ash, 1 part of calcium stearate, 1 part of alkyl sodium sulfonate, 5 parts of zinc phosphate, 2 parts of calcium oxide, 3 parts of polyethylene wax, 2 parts of zirconium fluoride, 2 parts of poly-xylene siloxane and 6-10 parts of auxiliary additive. The waste rubber tire recycling product and the method thereof fully recycle agricultural byproducts, straws and waste rubber tires, improve the recycling rate of solid waste, and fully excavate the potential value of the solid waste. But the waste rubber tire recycling product disclosed by the method needs more auxiliaries to complete recycling, and is higher in cost.

CN110128724A discloses a reclaimed rubber for recycling waste rubber tires and a preparation method thereof, the disclosed reclaimed rubber for recycling waste rubber tires comprises 50-150 parts by weight of waste tire rubber powder, 3-7 parts by weight of a softening agent, 0.1-0.5 part by weight of rosin and 0.1-0.3 part by weight of an activating agent, the disclosed preparation method comprises the steps of proportioning, desulfurization and post-treatment, the disclosed reclaimed rubber fully recycles solid waste materials of the waste rubber tires, fully excavates the potential value of the solid fertilizer waste rubber tires, overcomes the technical problems of environmental pollution and resource waste defects, greatly exerts the real value of the waste solid waste materials, lays a solid foundation for protecting the environment and simultaneously improves the economic benefit. But the reclaimed rubber disclosed therein does not take into account the effect of the auxiliary on the recovery of the waste rubber.

Therefore, it is important to develop a reclaimed rubber having a simple composition, a simple production method and excellent comprehensive properties.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a preparation method and application of reclaimed rubber, wherein the reclaimed rubber has higher tensile strength and elongation at break and excellent aging resistance, and meets the production requirements in the aspects of hardness, tensile strength, elongation at break and aging resistance.

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

in a first aspect, the invention provides a reclaimed rubber, which comprises the following raw materials in parts by weight: 100 parts of waste rubber, 3-4 parts of a sulfonate water reducing agent, 2-3 parts of a cross-linking agent, 3-4 parts of an accelerator, 1-3 parts of softening oil, 1-3 parts of a homogenizing agent, 0.5-5 parts of an activating agent and 0.5-2 parts of a vulcanizing agent.

The reclaimed rubber of the invention uses the sulfonate water reducing agent, the cross-linking agent and the accelerant in combination as the reduction auxiliary agent, the sulfonate water reducing agent can reduce the bond energy of a cross-linking bond S-S bond in the waste rubber, so that the cross-linking bond is broken, and then uses the cross-linking agent and the accelerant in combination, so that the uncrosslinked waste rubber is cross-linked more perfectly again, the plasticity of the rubber is recovered, and the three have synergistic effect, can be uniformly dispersed in the waste rubber under the coordination of the softening oil and the homogenizing agent, is easy to be mixed with other components, ensures the vulcanization quality, so that the obtained regenerated rubber has better tensile strength and elongation at break and excellent aging resistance, the hardness, tensile strength, elongation at break and aging resistance of the reclaimed rubber meet the production requirements, and the tensile strength and elongation at break of any one finally obtained reclaimed rubber are lacked, so that the production requirements cannot be met. The three components can realize the functions only under a specific proportion, and the recycling of the obtained regenerated rubber is not facilitated due to too much or too little addition of the reducing additive.

The sulfonate water reducing agent accounts for 3-4 parts by weight in the regenerated rubber, such as 3.2 parts, 3.4 parts, 3.6 parts, 3.8 parts and the like.

The weight portion of the cross-linking agent in the regenerated rubber is 2-3 portions, such as 2.2 portions, 2.4 portions, 2.6 portions, 2.8 portions and the like.

The weight portion of the accelerant in the reclaimed rubber is 3-4, such as 3.2, 3.4, 3.6, 3.8, etc.

The softening oil accounts for 1-3 parts by weight in the regenerated rubber, such as 1.2 parts, 1.4 parts, 1.6 parts, 1.8 parts, 2.0 parts, 2.2 parts, 2.4 parts, 2.6 parts, 2.8 parts and the like.

The weight portion of the homogenizing agent in the regenerated rubber is 1-3 portions, such as 1.2 portions, 1.4 portions, 1.6 portions, 1.8 portions, 2.0 portions, 2.2 portions, 2.4 portions, 2.6 portions, 2.8 portions and the like.

The weight portion of the activating agent in the regenerated rubber is 0.5-5 parts, such as 1 part, 1.5 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, 4.5 parts and the like.

The weight portion of the vulcanizing agent in the reclaimed rubber is 0.5-2 parts, such as 1 part, 1.5 parts and the like.

Preferably, the sulfonate water reducer comprises a sulfamate water reducer.

Preferably, the crosslinker comprises tetraethylenepentamine.

Preferably, the accelerator comprises hexamethylenetetramine.

Preferably, the homogenising agent comprises a combination of a saturated fatty acid, a zinc salt of an unsaturated fatty acid mixture and a higher fatty alcohol. The higher aliphatic alcohol refers to a mixture of monohydric alcohols containing six carbon atoms.

Preferably, the activator comprises zinc oxide and/or stearic acid, preferably a combination of zinc oxide and stearic acid. The zinc oxide is used as an activator, so that the activity of the accelerator can be improved, the vulcanization activator has the functions of reinforcing and anti-aging on the regenerated rubber, and the strength and the heat conductivity of the regenerated rubber can be improved; stearic acid softens and plasticizes the waste rubber, so that the zinc oxide is fully diffused, and the stearic acid and the zinc oxide are mixed to accelerate the hardening of the rubber.

Preferably, the weight portion of the zinc oxide in the reclaimed rubber is 2-4 parts, such as 2.5 parts, 3 parts, 3.5 parts, and the like.

Preferably, the weight portion of the stearic acid in the reclaimed rubber is 0.5 to 1 part, such as 0.6 part, 0.7 part, 0.8 part, 0.9 part and the like.

Preferably, the vulcanizing agent comprises sulphur.

Preferably, the preparation raw materials of the regenerated rubber comprise the following components in parts by weight: 100 parts of waste rubber, 3-4 parts of a sulfonate water reducing agent, 2-3 parts of tetraethylenepentamine, 3-4 parts of hexamethylenetetramine, 1-3 parts of softening oil, 1-3 parts of a homogenizing agent, 2-4 parts of zinc oxide, 0.5-1 part of stearic acid and 0.5-2 parts of a vulcanizing agent.

In the formula of the regenerated rubber, a sulfonate water reducing agent is preferably selected, tetraethylenepentamine and hexamethylenetetramine are used in a matching manner, and the tetraethylenepentamine and the hexamethylenetetramine can restore the plasticity of the rubber subjected to crosslinking decomposition by the sulfonate water reducing agent to the maximum extent.

In a second aspect, the present invention provides a method for preparing the reclaimed rubber according to the first aspect, the method comprising the steps of: mixing and plasticizing the waste rubber, the sulfonate water reducing agent, the crosslinking agent, the accelerator, the softening oil and the homogenizing agent according to the formula amount, and then mixing the activating agent and the vulcanizing agent according to the formula amount with the plasticized rubber material to obtain the regenerated rubber.

Preferably, the preparation method further comprises: and before the mixing and plasticizing, cleaning the surface of the waste rubber, crushing the waste rubber, and naturally drying the waste rubber.

Preferably, the particle size of the crushed waste rubber is 40 to 60 meshes, for example, 42 meshes, 44 meshes, 46 meshes, 48 meshes, 50 meshes, 52 meshes, 54 meshes, 56 meshes, 58 meshes, and the like.

Preferably, the plasticizing specifically comprises: and (3) heating and stirring the crushed waste rubber, the sulfonate water reducer, the crosslinking agent, the accelerator, the softening oil and the homogenizing agent for the first time to complete plasticization.

Preferably, the heating temperature is 80-90 deg.C, such as 81 deg.C, 82 deg.C, 83 deg.C, 84 deg.C, 85 deg.C, 86 deg.C, 87 deg.C, 88 deg.C, 89 deg.C etc.

Preferably, the rotation speed of the first stirring is 900-1000r/min, such as 910r/min, 920r/min, 930r/min, 940r/min, 950r/min, 960r/min, 970r/min, 980r/min, 990r/min, etc.

Preferably, the time of the first stirring is 5-7min, such as 5.5min, 6min, 6.5min, etc.

Preferably, the second stirring after plasticizing is carried out while cooling.

Preferably, the cooling is performed in a cooling device.

Preferably, the rotation speed of the second stirring is 30-40r/min, such as 31r/min, 32r/min, 33r/min, 34r/min, 35r/min, 36r/min, 37r/min, 38r/min, 39r/min and the like.

Preferably, the temperature at the end of the cooling is 30-35 ℃, e.g., 31 ℃, 32 ℃, 33 ℃, 34 ℃, etc.

Preferably, the mixing is carried out in a twin-screw extruder.

Preferably, the temperature of the rubber is 70-80 ℃, such as 71 ℃, 72 ℃, 73 ℃, 74 ℃, 75 ℃, 76 ℃, 77 ℃, 78 ℃, 79 ℃ and the like.

Preferably, the time for mixing the rubber is 10-12min, such as 10min, 10.5min, 11min, 11.5min, and the like.

As a preferred technical scheme, the preparation method comprises the following steps:

(1) cleaning the surface of the waste rubber, crushing the waste rubber into rubber particles of 40-60 meshes, and naturally drying the rubber particles;

(2) then stirring and heating the crushed waste rubber, the sulfonate water reducing agent, the crosslinking agent, the accelerant, the softening oil and the homogenizing agent under the conditions of 900-1000r/min and 80-90 ℃ to finish plasticizing;

(3) then cooling the plasticized rubber material to 30-35 ℃ in a cooling device at the rotating speed of 30-40 r/min;

(4) and finally, transferring the cooled rubber material to a double-screw extruder, adding an activating agent and a vulcanizing agent, and mixing for 10-12min at the temperature of 70-80 ℃ to obtain the regenerated rubber.

In a third aspect, the present invention provides a conveyor belt comprising the reclaimed rubber of the first aspect.

Compared with the prior art, the invention has the following beneficial effects:

the regenerated rubber has high tensile strength, elongation at break and aging resistance, has high tensile strength and elongation at break, has excellent aging resistance, and meets the production requirements in the aspects of hardness, tensile strength, elongation at break and aging resistance. The hardness of the reclaimed rubber is in the range of 64-75SHA degrees; the tensile strength after normal temperature aging is more than 17.1Mpa, and the tensile strength after 100 ℃ aging is more than 15.6 Mpa; the elongation at break after normal temperature aging is more than 363%, and the elongation at break after 100 ℃ aging is more than 352%.

Detailed Description

For the purpose of facilitating an understanding of the present invention, the present invention will now be described by way of examples. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.

Example 1

The embodiment provides a reclaimed rubber, and the preparation raw materials of the reclaimed rubber comprise the following components in parts by weight:

100 parts of waste rubber, 3.5 parts of a sulfonate water reducing agent (purchased from Gaoxing building material additive Co., Ltd., brand RH-4), 2.5 parts of tetraethylenepentamine, 3.5 parts of hexamethylenetetramine, 2 parts of softening oil (purchased from Hao great petrochemical Co., Ltd., brand No. 32# rubber softening oil, Miao city), 2 parts of a homogenizing agent (purchased from Zhengzhou Jinshan chemical Co., Ltd., brand homogenizing agent A-78), 3 parts of zinc oxide, 0.7 part of stearic acid and 1 part of sulfur (purchased from Shanghan Mei New Material science and technology Co., Ltd., brand sulfur OT 20).

The preparation method of the regenerated rubber comprises the following steps:

(1) cleaning the surface of the waste rubber, crushing the waste rubber into 55-mesh colloidal particles, and naturally drying the colloidal particles;

(2) then stirring and heating the crushed waste rubber, the sulfonate water reducing agent, the tetraethylenepentamine, the hexamethylenetetramine, the softening oil and the homogenizing agent at 950r/min and 90 ℃ to complete plasticization;

(3) then cooling the plasticized rubber material to 35 ℃ in a cooling device at the rotating speed of 35 r/min;

(4) and finally transferring the cooled rubber material to a double-screw extruder, adding zinc oxide, stearic acid and sulfur, and mixing for 11min at 75 ℃ to obtain the regenerated rubber.

Example 2

The embodiment provides a reclaimed rubber, and the preparation raw materials of the reclaimed rubber comprise the following components in parts by weight:

100 parts of waste rubber, 3 parts of a sulfonate water reducing agent (purchased from Gaoxing building material additive company Limited, brand RH-4, Yangquan), 2 parts of tetraethylenepentamine, 3 parts of hexamethylenetetramine, 1 part of softening oil (purchased from Hao great petrochemical company Limited, brand No. 32 rubber softening oil, Miao city), 1 part of homogenizing agent (purchased from Zhengzhou Jinshan chemical industry Limited, brand homogenizing agent A-78), 2 parts of zinc oxide, 0.5 part of stearic acid and 0.5 part of sulfur (purchased from Shanghainem New Material science and technology company Limited, brand No. sulfur OT 20).

The preparation method of the regenerated rubber comprises the following steps:

(1) cleaning the surface of the waste rubber, crushing the waste rubber into rubber particles of 40 meshes, and naturally drying the rubber particles;

(2) then stirring and heating the crushed waste rubber, the sulfonate water reducing agent, the tetraethylenepentamine, the hexamethylenetetramine, the softening oil and the homogenizing agent at 900r/min and 80 ℃ to complete plasticization;

(3) then cooling the plasticized rubber material to 30 ℃ in a cooling device at the rotating speed of 30 r/min;

(4) and finally transferring the cooled rubber material to a double-screw extruder, adding zinc oxide, stearic acid and sulfur, and carrying out rubber mixing at 70 ℃ for 12min to obtain the regenerated rubber.

Example 3

The embodiment provides a reclaimed rubber, and the preparation raw materials of the reclaimed rubber comprise the following components in parts by weight:

100 parts of waste rubber, 4 parts of a sulfonate water reducing agent (purchased from Gaoxing building material additive company Limited, brand RH-4, Yangquan), 3 parts of tetraethylenepentamine, 4 parts of hexamethylenetetramine, 3 parts of softening oil (purchased from Hao great petrochemical company Limited, brand No. 32 rubber softening oil, Miao city), 3 parts of a homogenizing agent (purchased from Zhengzhou Jinshan chemical industry Co., Ltd, brand homogenizing agent A-78), 4 parts of zinc oxide, 1 part of stearic acid and 2 parts of a new sulfur material (purchased from Shanghangton American scientific and technology Co., Ltd, brand sulfur OT 20).

The preparation method of the regenerated rubber comprises the following steps:

(1) cleaning the surface of the waste rubber, crushing the waste rubber into 60-mesh colloidal particles, and naturally drying the colloidal particles;

(2) then stirring and heating the crushed waste rubber, the sulfonate water reducing agent, the tetraethylenepentamine, the hexamethylenetetramine, the softening oil and the homogenizing agent at the temperature of 85 ℃ at 1000r/min to complete plasticization;

(3) then cooling the plasticized rubber compound to 32 ℃ in a cooling device at the rotating speed of 40 r/min;

(4) and finally transferring the cooled rubber material to a double-screw extruder, adding zinc oxide, stearic acid and sulfur, and mixing the rubber for 10min at 80 ℃ to obtain the regenerated rubber.

Example 4

This example differs from example 1 only in that tetraethylenepentamine is replaced by an equal mass of cross-linking agent TAIC (diallyl phthalate), the rest being the same as example 1.

Example 5

This example differs from example 1 only in that hexamethylenetetramine is replaced by an equivalent mass of promoter MZ (2-mercaptobenzothiazole zinc salt), the remainder being identical to example 1.

Comparative example 1

Comparative example 1 differs from example 1 only in that the sulfonate water reducing agent is replaced by equal mass of naphthalene water reducing agent (diallyl phthalate and 2-mercaptobenzothiazole zinc salt in a mass ratio of 1: 1), and the rest is the same as example 1.

Comparative examples 2 to 3

Comparative examples 2 to 3 differ from example 1 only in that the parts by weight of the sulfonate water reducing agent were 1 part (comparative example 2) and 5 parts (comparative example 3), respectively, and the remainder was the same as in example 1.

Comparative examples 4 to 5

Comparative examples 4 to 5 are different from example 1 only in that the parts by weight of tetraethylenepentamine are 1 part (comparative example 4) and 5 parts (comparative example 5), respectively, and the rest is the same as example 1.

Comparative examples 6 to 7

Comparative examples 6 to 7 differ from example 1 only in that the parts by weight of hexamethylenetetramine are 1 part (comparative example 6) and 5 parts (comparative example 7), respectively, and the remainder is the same as example 1.

Performance testing

Examples 1-5 and comparative examples 1-7 were tested as follows:

and (3) mechanical testing: the reclaimed rubber described in examples 1 to 5 and comparative examples 1 to 7 was charged into a rubber refiner, and the temperature was set at 60 ℃ and the pressure at 11MPa, and the film was discharged after 7 minutes, and the film surface was required to be free of bubbles and smooth. After being placed for 24 hours at normal temperature, the films are placed on a film developing machine platform, a dumbbell-shaped cutter is placed on the films, the machine wheel is rotated manually, 2 parts of the films are cut respectively, and the film samples are all dumbbell-shaped. Wherein 1 part of the rubber sheet is placed in an aging machine at the normal temperature of 25 ℃, the other 1 part of the rubber sheet is placed in the aging machine at the normal temperature of 100 ℃, the aging time is 24 hours, and the mechanical properties of the rubber sheet are respectively tested by using a tensile machine and a hardness machine.

The test results are summarized in table 1.

TABLE 1

As can be seen from an analysis of the data in Table 1, the hardness of the reclaimed rubber in examples 1 to 3 is in the range of 64 to 75SHA °; the tensile strength after normal temperature aging is more than 17.1Mpa, and the tensile strength after 100 ℃ aging is more than 15.6 Mpa; the elongation at break after normal temperature aging is more than 363%, the elongation at break after aging at 100 ℃ is more than 352%, and the hardness, tensile strength, elongation at break and aging resistance of the regenerated rubber meet production requirements (the hardness is in the range of 60-75SHA DEG, the tensile strength is more than or equal to 15Mpa, and the elongation at break is more than or equal to 350%).

Analysis of comparative example 1, examples 4-5 and example 1 reveals that the combination of comparative example 1, examples 4-5 is inferior to example 1, demonstrating that the combination of sulfonate water reducer, tetraethylenepentamine and hexamethylenetetramine is more favorable to the combination of properties of the resulting reclaimed rubber.

As can be seen from the analysis of comparative examples 2-7 and examples 1-3, the comprehensive properties of comparative examples 2-7 are not as good as those of examples 1-3, and the sulfonate water reducing agent, the crosslinking agent and the accelerator are proved to be capable of obtaining the regenerated rubber with better properties under the specific mixture ratio.

The applicant states that the present invention is illustrated by the above examples to show the detailed process equipment and process flow of the present invention, but the present invention is not limited to the above detailed process equipment and process flow, i.e. it does not mean that the present invention must rely on the above detailed process equipment and process flow to be implemented. It should be understood by those skilled in the art that any modification of the present invention, equivalent substitutions of the raw materials of the product of the present invention, addition of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.