Aging-resistant color-unchangeable tire side wall rubber composition

Abstract

The invention relates to the technical field of rubber, and in particular to an aging-resistant color-unchangeable tire side wall rubber composition which is characterized by containing the following components in parts by weight through mixing and blending: 30.0-70.0 parts of natural rubber, 35.0-65.0 parts of butadiene rubber, 3.0-20.0 parts of modified rubber, 2.0-10.0 parts of liquid cis-polybutadiene rubber, 30.0-50.0 parts of carbon black, 3.0-15.0 parts of white carbon black, 3.0-5.0 parts of zinc oxide, 1.5-2.5 parts of stearic acid, 2.0-5.0 parts of a tackifying resin, 1.0-3.0 parts of an anti-aging agent 4020, 0.5-1.5 parts of an anti-aging agent RD, 0.3-.2.5 parts of high-temperature microcrystalline wax, 1.0-5.0 parts of aromatic hydrocarbon oil, 1.5-2.5 parts of sulfur, 0.5-1.5 parts of an accelerant NS and 0.1-0.3 part of a scorch retarder CTP (Cyclohexyl Thiophthalimide). By adopting the composition, on premise that the color of a tire is not changed, the aging resistance of a tire side wall is improved, the service life of a tire is prolonged, and the renovation rate of the tire is also increased.

Description

technical field [0001] The invention relates to the technical field of tire rubber, in particular to an anti-aging and non-discoloration tire sidewall rubber composition. Background technique [0002] As we all know, with the development of the passenger and freight transportation industry, the development of the all-steel radial tire industry has been driven. The competition in the all-steel tire market has become increasingly fierce, and the demand for high-performance and high-quality tires has gradually increased. In addition to heat generation and high grip, users have higher and higher requirements for the appearance quality of tires. Some salesmen even regard the appearance quality of tires as one of the selling points of sales. [0003] Due to the long-term erosion of the tire by light, heat, oxygen and ozone during use, the surface of the tire is prone to surface cracks caused by rubber aging and broken chains. Ozone reacts with rubber to achieve the purpose of pro...

AI Technical Summary

Problems solved by technology

The more the anti-aging agent content, the better the anti-aging and cracking performance of the rubber compound; to achieve the protective effect, the anti-aging agent must migrate to the surface of the tire. The reaction product on the side surface is also reddish brown, resulting in a slightly reddish brown or different black appearance on the sidewall surface, thus affecting the appearance quality of the tire

[0004] The tire industry has been conducting research on sidewall discoloration, trying to replace the traditional polluting antiaging agent 4010NA with a non-polluting antiaging agent (such as 4020 used in most tire factories), even if it is improved, as the storage period extends, the sidewall The surface will still appear brown. For the application of modified chlorosulfonated polyethylene combined with high-temperature microcrystalline wax and white carbon black with reasonable carbon number distribution and high isomer content, there is no patent for the improvement of tire sidewall discoloration. to report

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