Semi-steel meridian tire sidewall rubber composition and preparation method thereof

Abstract

The invention belongs to the technical field of rubber tires and chemical engineering manufacturing, and concretely relates to a liquid isoprene rubber-containing semi-steel meridian tire sidewall rubber composition and a preparation method thereof. The tire sidewall rubber composition comprises, by weight, 30-50 parts of natural rubber, 40-60 parts of butadiene rubber, 10-20 parts of liquid isoprene rubber, 52-56 parts of carbon black, 4.6-5.7 parts of an activator, 3.7-4.2 parts of an antioxidant, 1.8-2.5 parts of protection wax, 2-4 parts of a homogenizing agent, 0.7-1.0 part of a promoter and 1.76-1.8 parts of sulfur. The liquid isoprene rubber is used in semi-steel tire sidewalls, and rubber processing oil in traditional formulas is eliminated, so the problems of visual pollution and color change of tires, caused by migration and precipitation of the rubber processing oil from the surfaces of the tires in the late stage are solved, thereby the visual brightness of the tires is improved; and the use of the liquid isoprene rubber makes produced tires be better than tires produced by using the rubber processing oil in tire sidewall deflection heating reduction, tear resistance, cold resistance and ageing resistance.

Description

[0001] Technical field: [0002] The invention belongs to the technical field of rubber tires and chemical manufacturing, and in particular relates to a rubber composition using liquid isoprene rubber for the sidewall of a semi-steel radial tire and a preparation method thereof. [0003] Background technique: [0004] Rubber operating oil is added to the traditional formula to improve the properties of rubber such as elasticity, flexibility, ease of processing, and ease of mixing. However, in the later stage, the rubber operating oil will migrate and precipitate on the surface of the tire, resulting in contamination and discoloration of the tire appearance. The vividness is reduced, and the aromatic hydrocarbon oil used in the rubber operation oil is carcinogenic, which seriously damages people's health. [0005] Canceling the rubber process oil in the traditional formula and adding liquid isoprene rubber to the raw materials can improve the appearance pollution and discolorati...

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Problems solved by technology

[0008] The purpose of the present invention is to overcome the shortcomings of the prior art, provide a tire that is different from the prior art, solve the problem of tire appearance pollution and discoloration caused by the migration and precipitation of rubber operating oil on the tire surface in the later stage, and make the tire appearance brighter. It has been significantly improved. In addition, due to the use of liquid isoprene rubber, the tires made are superior to tires made of rubber operating oil in terms of flexural heat generation, tear resistance, cold resistance, and aging resistance.

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