Rubber antiager and method for preparing same

Abstract

The invention discloses a rubber antioxidant and a preparation method thereof. The rubber antioxidant is prepared through the complex reaction of para-phenylene diamine antioxidant and autunite-zinc polymethyl terephthalate; wherein the weight ratio of para-phenylene diamine antioxidant to autunite-zinc polymethyl terephthalate is 2:1-3:1. The preparation method includes the following steps: 1)dissolving para-phenylene diamine antioxidant in acetone solution based on weight ratio of 1:1-1.5:1, producing a mixture solution; 2)adding autunite-zinc polymethyl terephthalate aqueous solution and hyamine catalyzer at the same time into a reactor and blending the two; 3)introducing high temperature steam to the jacket of the reactor and when the temperature reaches 110-120 DEG C, adding the mixture ssolution prepared in step 1); 4) conducting complex reaction for 1.5-3h when the material is at infinite reflux state and finally distilling and recovering the acetone. The rubber antioxidant is of excellent ageing resistance and is free from problems of serious color deterioration, fusion and agglomeration.

Description

technical field [0001] The invention relates to a rubber antioxidant and a preparation method thereof, in particular to a p-phenylenediamine rubber antioxidant and a preparation method thereof. Background technique [0002] As we all know, N-isopropyl-N'-phenyl-p-phenylenediamine (rubber anti-aging agent 4010NA) and N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine (rubber anti-aging Agent 4020) are currently the two p-phenylenediamine antioxidants with the best comprehensive performance. They have excellent properties such as thermal oxygen aging resistance, ozone aging resistance, flex cracking resistance aging and harmful metal ion aging resistance. But these two antioxidants also have the following disadvantages. [0003] N-isopropyl-N'-phenyl-p-phenylenediamine is easily extracted and lost by water or solvent (up to 50%), which affects long-term performance. Moreover, it is easy to change color and migrate, thereby polluting the product. There are also stimulating ...

AI Technical Summary

Problems solved by technology

[0003] N-isopropyl-N'-phenyl-p-phenylenediamine is easily extracted and lost by water or solvents (up to 50%), affecting long-term performance

And it is easy to change color and migrate, thus polluting the product

It is also irritating and toxic, which can easily cause skin allergies

[0004] Compared with N-isopropyl-N'-phenyl-p-phenylenediamine, N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine is resistant to water extraction and solvent resistance Slightly better in terms of extraction loss and toxicity, but there is still a serious problem of discoloration

And it is easy to melt and agglomerate, which is not conducive to transportation, processing and storage, especially when the temperature is high in summer or during container stacking and transportation, it is very easy to melt or self-adhesive blocks

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