Rubber composition for improving tearing property of rubber and application

A rubber composition and rubber technology, which is applied in the field of rubber composition for tire treads and tires, can solve the problems of increasing the amount of carbon black, reducing the processing performance of the composition, and affecting the life of the tire, so as to achieve Mooney viscosity reduction and tear-off Improvement of elongation and tear strength, compatibility enhancement effect

Active Publication Date: 2016-02-17
BEIJING RED AVENUE INNOVA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The tear resistance of tires can be improved by appropriately increasing the amount of carbon black, but the increase in the amount of carbon black will also bring another problem, that is, the processing performance of the composition used for tires will decrease
In addition, the increase in the amount of filler in the tire will also cause the tire to generate heat during driving, which will eventually affect the life of the tire
Silica is another commonly used filler in the rubber field. Adding silica to the rubber composition can improve the cut resistance of the composition, but the wear resistance is not good

Method used

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  • Rubber composition for improving tearing property of rubber and application
  • Rubber composition for improving tearing property of rubber and application
  • Rubber composition for improving tearing property of rubber and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Add 1mol of phenol, 60ml of toluene, BF 3 ·Et 2 O catalyst 8ml, through N 2 Protection, heat up to 70°C to completely dissolve phenol, slowly add 0.8mol of DCPD dropwise, control the reaction temperature at 110-120°C, after 2 hours of reaction, add 2mL of ethanol to quench the catalyst, change to a distillation state to evaporate the toluene solvent and then return to reflux state. Add 0.5 g of p-toluenesulfonic acid, add 0.7 mol of styrene drop by drop, continue to add 150 g of wood rosin after reacting for 2 hours, and react for 1 hour at 130°C, change the condenser from the reflux state to the distillation state, heat the reactant to 190°C, slowly Turn on the vacuum to the maximum vacuum degree and keep it for 15 minutes, after neutralizing with sodium hydroxide, discharge the material. A wood rosin-modified phenol-DCPD resin was obtained. The softening point of the resin was determined to be 125.6°C.

Embodiment 2

[0048] Add 300 g of commercially available phenol-DCPD resin and 2.5 g of hydrochloric acid to a 1000 ml round bottom flask equipped with a stirring device, a thermometer, and a reflux condenser, and heat up to 150 ° C. After the resin is completely dissolved, add 1 mol of а-pinene dropwise, After reacting for 2 hours, continue to add 200 g of tall oil rosin and gum rosin mixture. After reacting for 1 hour at 150 ° C, change the condenser from the reflux state to the distillation state, heat the reactant to 190 ° C, slowly turn on the vacuum to the maximum vacuum degree and keep it for 15 min, use After being neutralized by sodium hydroxide, the material is discharged. A rosin-modified phenol-DCPD resin was obtained. The softening point of the resin was determined to be 115.3°C.

Embodiment 3

[0050] Add 1mol of phenol, 50ml of toluene, BF 3 ·Et 2 O catalyst 8ml, through N 2 Protection, heat up to 70°C to completely dissolve phenol, slowly add 0.8mol of DCPD dropwise, control the reaction temperature at 110-120°C, after 2 hours of reaction, add 2mL of ethanol to quench the catalyst, change to a distillation state to evaporate the toluene solvent and then return to reflux state. Add 0.5 g of p-toluenesulfonic acid, add 0.6 mol of α-methylstyrene dropwise, continue to add 100 g of gum rosin after 2 hours of reaction, and after 1 hour of reaction at 130 ° C, change the condenser from the reflux state to the distillation state, and heat the reactants to At 190°C, slowly turn on the vacuum to the maximum vacuum degree and keep it for 15 minutes, neutralize with sodium hydroxide, and discharge. A wood rosin-modified phenol-DCPD resin was obtained. The softening point of the resin was determined to be 123.7°C.

[0051] 2. Preparation and performance test of rubber com...

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Abstract

Provided is a tire tread rubber composition. The composition contains rosin-modified phenol-DCPD resin, and the structure of the rosin-modified phenol-DCPD resin is shown as a formula (I). According to the rubber composition, the tearing property and the machining property are both improved, the abrasive resistance is improved, and the dynamic property is improved.

Description

technical field [0001] The invention belongs to the field of rubber compositions, and in particular relates to a rubber composition for a tire tread, a preparation method thereof and a tire comprising the tread. Background technique [0002] Tires will be damaged during use, especially in poor road conditions, the tire surface is more likely to be hit or punctured by sharp objects, resulting in reduced tire life, so improving the durability of tires is currently an unresolved issue The problem. In the general tire tread formula, natural rubber and synthetic rubber (such as styrene-butadiene rubber, butadiene rubber, etc.) are used. Compared with natural rubber-based rubber, synthetic rubber such as styrene-butadiene rubber and butadiene rubber , and its tear resistance is worse. The tear resistance of the rubber is an important factor related to the durability of the tire. The improvement of the tear resistance of the rubber will help to improve the tire's resistance to cu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/00C08L9/06C08L65/00C08K13/02C08K3/04C08K3/36C08K5/09
CPCC08L7/00C08L9/06C08L2205/02C08L2205/03C08L2205/035C08L65/00C08K13/02C08K3/04C08K3/36C08K5/09
Inventor 张洁王文芳张成蒋小强董栋
Owner BEIJING RED AVENUE INNOVA
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