High-performance rubber cracking preventing agent

Abstract

The invention discloses a high-performance rubber cracking preventing agent. The preventing agent is prepared from the following components in parts by weight: 20 to 30 parts of Number-58 completely-refined paraffin, 15 to 25 parts of number-58 semi-refined paraffin; 22 to 34 parts of number-70 microcrystalline wax, 18 to 30 parts of number-85 microcrystalline wax, 4 to 8 parts of oxidized polyethylene wax, and 2 to 5 parts of polyethylene wax. The preventing agent is smooth in surface, uniform in thickness, good in leakproofness, compact in structure, high in flexibility, heat resistance, elasticity and adhesive force, uneasy to drop, capable of playing a barrier role in preventing rubber from contacting ozone gas, and capable of effectively delaying the oxidization effect, delaying the cracking and prolonging the service life.

Description

technical field [0001] The invention relates to a preventive agent, in particular to a high-efficiency rubber crack preventive agent. Background technique [0002] Rubber cracking, which is an aging phenomenon of rubber, refers to the gradual deterioration of the performance of polymer materials (including rubber, plastics, fibers, etc.) during processing, storage and use due to the combined effect of internal and external factors. , so that a large number of slight fine lines appear on the surface and inside, which will eventually lead to the loss of use value of the product. The cracking of rubber is a common problem of rubber products, mainly due to the weak points on the surface and interior of the structure or components that are easy to cause cracking, such as It has unsaturated double bonds, branched chains, carbonyl groups, hydroxyl groups at the ends, etc., and external or environmental factors are mainly sunlight, oxygen, ozone, heat, water, mechanical stress, high...

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Problems solved by technology

[0005] In the rubber industry, especially the tire industry, there were many misunderstandings in the selection of rubber crack preventers in the past, and ordinary paraffin was generally used instead, which has little effect on improving product quality, preventing crack aging, and prolonging the service life of rubber products. Manufacturers of rubber cracking preventive agents mainly include British Astor Company, German Tehal Company, Rhine Company, etc., with a production scale of more than 10,000 tons and many varieties, but their prices are relatively expensive. At present, China Petrochemical Co., Ltd. The company's Fushun Petrochemical Research Institute and Jingmen Branch have successfully developed rubber cracking preventive agents, with a total production of about 3.5kt / a. However, compared with foreign products, my country's rubber cracking preventive agents mainly focus on rubber Developed on the basis of paraffin, there is a lack of in-depth research on the protective mechanism of rubber and the origin of precipitation. No matter in terms of variety or quality, it needs to be further developed and improved. From the perspective of development trends, Asia will be the leader in radial tires in the next 5 to 10 years. Hot production areas, my country's auto tire radialization will enter a period of rapid growth

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