Resorcinol resins and method for preparing resorcinol resins

Abstract

The invention relates to improved resorcinol resin of methylene acceptor in a system of rubber and steel cord adhesives. The invention is characterized in that hydroxyphenol and azole compounds with monoetherification functional groups, by the molar ration of 1:1 to 1:2, are etherified partially or totally under the protection of nitrogen. The obtained resin not only has no dissociation hydroxyphenol basically, thereby completely solving the problems of the smoke formation and the weight reduction of the hydroxyphenol generated under the high temperature of mixing and having good environment protection, but also the resin has stronger acceptance capacity for methylene, adding that the molecule contains azole heterocycle structures, the tests indicate that the adhesion bonding force between the rubber and the steel cord adhesives is improved.

Description

Resorcinol resin and preparation method thereof technical field The invention relates to an improved methylene acceptor resorcinol resin in the adhesive system between rubber and steel cords, especially a resorcinol resin methylene with good environmental protection and strong adhesion base acceptor. Background technique Resorcinol resin is the methylene acceptor in the direct bonding system between rubber and steel cords. However, in the synthesis of resorcinol resin, it is often impossible to make it react completely, so there is a certain amount of free resorcinol, which will sublimate and release toxic and irritating smoke (smog for short) at high temperature during mixing. It not only endangers human health and pollutes the environment, but also leads to inaccurate measurement due to sublimation, which adversely affects the performance of products. For this reason, people have adopted various modifications to reduce free resorcinol, reduce fuming and weight loss at ...

AI Technical Summary

Problems solved by technology

However, the modification is to use bisphenol A epoxy resin with double etherification reaction groups, so the etherification reaction will form a high polymer, and the molecular weight is too large, which makes it difficult for the obtained resin to disperse evenly in the rubber system

In order to control the production of high polymers, the reaction cannot be carried out thoroughly, so there is still a certain amount of free resorcinol, and the problems of fuming and weight loss still exist; secondly, the adhesive performance of the resin is not ideal.

Therefore, although prior art has multiple p-resorcinol modification, all fails to thoroughly overcome its deficiency, and modification all has certain deficiency, still has the place worth improving