All-steel radial tire shoulder wedge and preparation method thereof

Abstract

The invention provides an all-steel radial tire shoulder wedge and a preparation method thereof. The all-steel radial tire shoulder wedge provided by the invention is prepared from the following raw materials in parts by mass: 80-95 parts of natural rubber, 5-20 parts of trans-butadiene-isoprene rubber, 35-55 parts of a reinforcing agent, 0-3.0 parts of a dispersant, 0-1.5 parts of a silane coupling agent, 2.0-6.0 parts of zinc oxide, 1.5-3.5 parts of stearic acid, 1.0-4.0 parts of tackifying resin, 1.0-3.0 parts of an anti-aging agent, 1.5-2.2 parts of an accelerant, 1.8-2.7 parts of sulfur,and 0.2-0.5 part of an anti-scorching agent. According to the all-steel radial tire shoulder wedge provided by the invention, on the basis that good vulcanization characteristics and basic physical and mechanical properties of the tire shoulder wedge are ensured, the fatigue resistance can be improved, and the rolling resistance and compression heat generation can be reduced.

Description

technical field [0001] The invention relates to the technical field of tires, in particular to an all-steel radial tire shoulder pad rubber and a preparation method thereof. Background technique [0002] The shoulder pad rubber of all-steel radial tires is located at the transition part of tread rubber, soft sidewall rubber and high-hardness belt layer, and is the area where the stress concentration of all-steel radial tires is the largest. During the running of the tire, the large deformation of the shoulder pad rubber part makes the rolling resistance of this part larger and the heat generation is higher. At the same time, because the shoulder pad rubber is the thickest part of the all-steel radial tire, it is difficult to dissipate the heat generated. With the prolongation of tire running time, the accumulation of heat will lead to higher temperature of the rubber part of the tire shoulder pad, rubber aging and performance degradation, which will lead to cracking of the t...

AI Technical Summary

Problems solved by technology

"Elastomer" reported in 2009 that the compression heat generation of shoulder pad rubber containing trans isoprene rubber is significantly reduced, but the hardness and viscosity of the compound are poor and difficult to process and apply

"Tire Industry" reported in 2015 that the compression heat generation of shoulder pad rubber containing anti-shoulder void agent ST was significantly reduced, but the vulcanization rate was significantly reduced, and the hardness and modulus stress were reduced.

Patent applications CN103865119A, CN107759843A and "Tire Industry" reported in 2013 that the compression heat generation of the compound reinforced shoulder pad rubber containing silica / carbon black was significantly reduced, but because the vulcanization rate of the compound rubber containing silica was slow , affecting its vulcanization properties

It can be seen that the interaction of the components in the tire shoulder pad rubber is relatively complicated, the relationship between its heat generation, rolling resistance and fatigue resistance, as well as the above-mentioned performance and its basic physical and mechanical properties (such as strength, hardness, resilience, etc.) Difficult to reconcile between or processing vulcanization characteristics, making it very difficult to formulate

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