Preparation method of long-acting anti-aging material

Abstract

The invention discloses a preparation method of a long-acting anti-aging material, which comprises the following specific preparation steps: S1, preparing 2, 6-di-tert-butyl-4-nitrosophenol; s2, preparing 2, 6-di-tert-butyl-4-aminophenol (2, 6- S3, preparing an intermediate I; s4, preparing an intermediate II; and S5, dissolving the intermediate II in absolute methanol, adding a catalyst p-toluenesulfonic acid, carrying out reflux reaction for 6-8 hours, distilling methanol / methyl acetate azeotrope under normal pressure, and recrystallizing in isopropanol to obtain the phenolic hydroxyl group-containing maleimide. The rubber vulcanizing agent contains an active group maleic double bond capable of reacting with rubber macromolecules, can chemically react with rubber in the vulcanizing process, is bonded in a rubber macromolecular network through a chemical bond, and has the advantages of no migration, no volatilization and no extraction; meanwhile, phenolic hydroxyl groups with the function of inhibiting rubber aging are provided, substances harmful to human bodies cannot be generated, and Ror ROO generated in aging reaction is easily captured, so that free radical reaction is inhibited, and the purpose of preventing rubber aging is achieved.

Description

technical field [0001] The invention belongs to the field of rubber auxiliaries, and relates to a preparation method of a long-acting anti-aging material. Background technique [0002] During the use of rubber, it will be affected by external factors (such as ozone aging, thermal oxygen aging, etc.) and age, resulting in changes in its physical and mechanical properties, causing the rubber to lose its elasticity, decrease its mechanical properties, and shorten its service life. In order to solve the problem of rubber aging, it is necessary to add anti-aging materials to the rubber in order to inhibit or delay the aging process and prolong the service life of rubber products. [0003] The general anti-aging material added to the rubber by kneading will be drawn out under the use conditions of the rubber product and lose the function of protecting the rubber macromolecules, and the escaped anti-aging material will pollute the environment. Therefore, the development of anti-ag...

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Problems solved by technology

[0003] The general anti-aging material added to rubber by mixing will be extracted under the conditions of use of rubber products and lose the function of protecting rubber macromolecules, and the escaped anti-aging material will pollute the environment

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