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Tire tread rubber composition and vulcanized rubber, preparation method and application thereof

A technology for rubber composition and tire tread, which is applied in the fields of tire tread rubber composition, vulcanized rubber, and preparation of vulcanized rubber, can solve the problems of difficult processing, easy to generate cross-linking, difficult to control polymer structure, etc., and achieves improved dispersion uniformity , the effect of easy availability of raw materials and simple process

Active Publication Date: 2021-04-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] CN101821328A introduces silane groups through chemical bonding before the rubber is removed from the solvent, and obtains a diene-based rubber with excellent wet slip and wear resistance. Although this method can be better on the molecular chain Polar groups are introduced, but the solvent removal of rubber is difficult, and crosslinking is easy to occur during the solvent removal process, which affects the solvent removal and processing difficulties in the application process
[0006] CN102731723A adopts free radical polymerization mechanism to polymerize polar groups into molecular chains. As everyone knows, free radical polymerization is difficult to control the structure of polymers. Although this method can introduce polar groups in molecular chains, the structure of the main body rubber is very difficult. Difficult to meet expectations
However, the properties of silica with different specific surface areas are quite different. They are either biased towards strength or dynamic properties, and it is impossible to achieve both.

Method used

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  • Tire tread rubber composition and vulcanized rubber, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] Embodiment 1: prepare vulcanized rubber

[0080] Composition: as shown in Table 1

[0081] Preparation:

[0082] (1) In the internal mixer, under the rotating speed of 70rpm, masticate the main rubber at the initial temperature of 50°C for 30s;

[0083] (2) Add 3 / 4 of the total white carbon black weight, all functionalized monomers, all medium-temperature initiators, first mix for 2 minutes, and control the first mixing temperature to 65°C;

[0084] (3) Add the remaining white carbon black, high-temperature initiator and other additives except vulcanizing agent and vulcanization accelerator, control the second mixing temperature to 155°C, and unload the rubber compound after the second mixing for 5 minutes;

[0085] (4) Pass the rubber material three times on an open mill with a roller distance of 5mm and a roller temperature of 50±5°C, and park the obtained mixed rubber for 4h;

[0086] (5) Mix the compound rubber obtained in step (4) with the vulcanizing agent and ...

Embodiment 2

[0089] Embodiment 2: prepare vulcanized rubber

[0090] Composition: as shown in Table 1

[0091] Preparation:

[0092] (1) In the internal mixer, under the rotating speed of 70rpm, masticate the main rubber at the initial temperature of 50°C for 30s;

[0093] (2) Add 3 / 4 of the total white carbon black weight, all functionalized monomers, all medium-temperature initiators, first mix for 1.5min, and control the first mix temperature to 70°C;

[0094] (3) Add the remaining white carbon black, high-temperature initiator and other additives except vulcanizing agent and vulcanization accelerator, control the second mixing temperature to 150°C, and unload the rubber compound after the second mixing for 6 minutes;

[0095] (4) Pass the rubber material three times on an open mill with a roller distance of 5mm and a roller temperature of 50±5°C, and park the obtained mixed rubber for 4h;

[0096] (5) Mix the compound rubber obtained in step (4) with the vulcanizing agent and the vulc...

Embodiment 3-6

[0099] Embodiment 3-6: Preparation of vulcanized rubber

[0100] Composition: as shown in Table 1

[0101] Preparation:

[0102] The method for preparing vulcanized rubber of Examples 3-6 is similar to the preparation method of Example 1, the difference is that the time and temperature of the first mixing and the second mixing involved in the method are different, specifically, see Table 1 enumerated data.

[0103] Vulcanized rubbers S3-S6 were obtained respectively.

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Abstract

The invention relates to the field of rubber, and discloses a tire tread rubber composition, a vulcanized rubber and a preparation method and application thereof. The composition contains a main body rubber, a reinforcing agent, a functionalized monomer and a free radical initiator, and the functionalized monomer It is a monomercapto compound, and the free radical initiator contains a medium-temperature initiator and a high-temperature initiator, and the medium-temperature initiator is a free radical initiator whose decomposition temperature is 40-100°C; the high-temperature initiator It is a free radical initiator with a decomposition temperature greater than 100°C. The way of adding different free radical initiators makes the functionalized monomer evenly distributed on the molecular chain of the main rubber, thus greatly improving the dispersion uniformity of the reinforcing agent in the main rubber, thus obtaining high strength and low rolling resistance. High resistance, high wet skid resistance, high abrasion resistance rubber composition for tire tread.

Description

technical field [0001] The present invention relates to the field of rubber, in particular to a tire tread rubber composition, a method for preparing vulcanized rubber by using the tire tread rubber composition, and the vulcanized rubber prepared by the method, and the aforementioned vulcanized rubber in tire tread rubber in the application. Background technique [0002] With the increasing popularity of automobiles, the amount of oil used and the emission of carbon dioxide are getting higher and higher, which has led to the shortage of oil resources and global warming. Therefore, a revolution in the automobile industry that reduces fuel consumption has directly triggered the requirements of automobile manufacturers to reduce the rolling resistance of tires. [0003] Rolling resistance accounts for 18-30% of the resistance that hinders the car from moving forward, and the energy consumption of rolling resistance accounts for about 14.4% of fuel consumption, which means that...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L9/06C08L9/00C08L7/00C08L91/06C08K13/02C08K5/37C08K5/548C08K3/36B60C1/00
CPCB60C1/0016C08K2201/006C08L7/00C08L9/06C08L2205/02C08L2205/03C08L2205/035C08L9/00C08L91/06C08K13/02C08K5/37C08K5/548C08K5/378C08K3/36Y02T10/86
Inventor 姜科解希铭段海东刘翠云刘苹李绍宁乔勋昌
Owner CHINA PETROLEUM & CHEM CORP