Preparation and application method of anti-aging protective rubber for tire sidewall and nipple

Abstract

The invention provides a aging resistance protection glue at tire side-wall and seam allowance part, which comprises components of natural rubber, brominated butyl rubber, high cis-butadiene rubber, ethylene-propylene diene copolymer, butyl reclaimed rubber, carbon black, eleaostearic acid, zinc oxide, octyl-phenolic tackifying resin, a hydrocarbon resin mixture, protection wax, naphthenic oil, sulphur and a promoter; and discloses a preparation method of the above rubber compound and an application method. The method changes a mode that the traditional rubber compound raw rubber system at the side-wall and seam allowance part rubber compound raw rubber system employs a combination mode of natural rubber and high cis-butadiene rubber, brominated butyl rubber with good aging resistance performance and high molecular chain saturation as well as high cis-butadiene rubber are added, a sulfuration system is optimized, thermo-oxidative aging resistance of the rubber compound can be increased, ozone aging resistance is increased; aging and cracking problems generated at the tire side-wall and seam allowance part can be avoided, tire usage security is increased, and refurbishment time of tire is increased.

Description

technical field [0001] The invention relates to a preparation and application method of anti-aging protective rubber for tire sidewalls and nipples, and belongs to the field of tire processing. Background technique [0002] During the storage and use of tires, a lot of heat will be generated due to the exposure to oxygen, ozone, ultraviolet rays, sunlight in the environment, and the periodic deformation of tires due to the full load of the vehicle and the continuous impact of the road surface, which will increase the temperature of the tires. The damages such as thermal aging, flexural fatigue, and oxidative aging occur; the most prone to various aging parts of the tire are the sidewall and the mouth, because these two parts are generally exposed to various environmental factors and the tire generates heat. Destruction: Cracks will occur after the tire sidewall is aged, and will continue to expand until the carcass cord, which will seriously affect the safety of the tire. T...

AI Technical Summary

Problems solved by technology

[0002] During the storage and use of tires, due to the oxygen, ozone, ultraviolet rays, and sunlight in the environment, and the tires bear the full load of the vehicle and are constantly impacted by the road surface, a large amount of heat will be generated due to periodic deformation, which will increase the tire temperature. Thermal aging, flex fatigue, oxidative aging and other damages occur; the most prone to various aging parts of the tire are the sidewall and the mouth part, because these two parts are generally exposed to various environmental factors and the heat generated by the tire. Destruction; after the aging of the sidewall of the tire, cracks will occur and continue to expand until the carcass cord, which will seriously affect the safety of the tire. At the same time, the aging of the sidewall and the mouth will affect the retreading of the tire. Less retreading times will cause a lot of waste of resources; at present, natural rubber and butadiene rubber are usually used in the sidewall and spigot compound formulations. Since these two rubbers are highly unsaturated rubbers, their rubber molecules contain a lot of activity. Double bonds are prone to aging due to the influence of heat, oxygen, ozone, ultraviolet rays and sunlight, resulting in performance degradation, hardening and brittleness. At present, the main method to solve the aging problem of sidewalls and rims is to increase the amount of anti-aging agent and add anti-vulcanization relapse The original agent and other methods, but the overall effect is not ideal, especially in the harsh conditions of tire use, such as overloading, long-distance driving, special use environments such as summer high temperature, high ozone concentration environment, etc.

The resistance will lead to performance degradation, hardening and brittleness, and cracks will be generated when the tire is flexed and deformed during use, and the crack will expand as the service time prolongs. When the crack expands to a certain extent, it will affect the safety of the tire and lose its refurbishment. value

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