Formula and preparation process of belted layer cushion rubber of all-steel radial tire

Abstract

The invention discloses a formula of belted layer cushion rubber of an all-steel radial tire. The formula is characterized in that the cushion rubber comprises the following raw materials by weight parts: 100 parts of natural rubber, 20-40 parts of carbon black, 5-20 parts of white carbon black, 0.1-0.4 part of an environment-friendly peptizer, 0.5-2 parts of stearic acid, 3-7 parts of zinc oxide, 1-3 parts of a carbon black dispersant, 0.5-2 parts of an anti-ageing agent RD, 1.5-3 parts of an anti-ageing agent 4020, 1-7.5 parts of a silane coupling agent, 1-4 parts of tackifying resin, 0.5-2 parts of bonding resin, 1.5-3 parts of insoluble sulfur HIS7020, 1-2.5 parts of an accelerant NS, 0.1-0.4 part of a scorch retarder CTP and 1-3 parts of an adhesion promoter RA-65. According to the formula, the durability of the tire can be greatly improved, the high-load long-distance driving resistance of the tire in a using process is improved, shoulder separation problems are reduced, and the economic benefit is increased.

Description

technical field [0001] The invention relates to the field of chemical materials, in particular to an all-steel radial tire belt cushion rubber formula and a rubber material preparation process. Background technique [0002] During the use of all-steel radial truck tires, due to the full load of the vehicle and the continuous impact and friction of the road surface, the rubber material of each part of the tire undergoes compression deformation, flexural deformation, and shear deformation between parts. Because the rubber material is a There is a certain hysteresis loss in the rubber compound of this kind of viscoelastic material, and part of the deformation is converted from mechanical energy into thermal energy, which generates a lot of heat and increases the temperature of the tire. When the temperature rises to a certain level, the performance of the rubber compound decreases and shoulders occur. Delamination damage, i.e. a shoulder void problem, can cause the tire to blow...

AI Technical Summary

Problems solved by technology

However, if a large amount of white carbon black is used, it will lead to difficulties in processability

In addition, by adjusting the type of carbon black, using soft carbon black or reducing the amount of carbon black can also reduce the heat generation of the rubber compound, but it will cause the hardness and modulus of the rubber compound to decrease, thereby increasing the force deformation, and the actual application effect is not good.

On the other hand, improving the anti-reversion of belt cushion rubber is mainly realized by adding anti-reversion agent, but the application of anti-reversion agent is actually limited due to its high price and ineffective application in ordinary vulcanization systems.

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