Method for preparing rubber tackifier p-tert-octylphenol formaldehyde resin

Abstract

The invention provides a preparation method of p-tert-octyl phenol formaldehyde resins. Mixture of C4 fraction by additive reaction after being treated with a sulfated-degassing process is adopted as raw material; isobutene dimmer with targeted distillate content more than 98 percent after respective evaporation and cutting at the temperature of 75 DEG C-105 DEG C is adopted as alkylating agent; Na-sulfonated polystyrene-polyvinylidene copolymer strong-base anion exchange resin and H-sulfonated polystyrene-polyvinylidene copolymer strong-acid cation exchange resin are adopted as alkylation catalyst so as to obtain the p-tert-octyl phenol alkylate mixture by alkylation reaction under the temperature of 90-100 DEG C; the mixture is then treated with respective evaporation and cutting under the temperature of 220-270 DEG C to prepare the p-tert-octyl phenol with the melting point of 87.5-89.5 DEG C; finally the p-tert-octyl phenol and formaldehyde solution are treated with condensation reaction catalyzed by acid in toluol medium to obtain the p-tert-octyl phenol formaldehyde resins.

Description

technical field [0001] The present invention relates to the general method of organic chemistry, particularly a kind of preparation method of rubber tackifier p-tertoctylphenol formaldehyde resin. Background technique [0002] P-tert-octylphenol formaldehyde resin is used as a tackifier for the rubber industry. It is an indispensable tackifier for the molding and processing of rubber products laminated or laminated by multi-layer films, especially for tires with synthetic rubber as the main rubber. . If p-tertyl phenol formaldehyde resin is added to the formula as a tackifier, it can not only increase the viscosity of synthetic rubber and improve the processability, but also can be used in large quantities in the formula to improve the mechanical properties of tires. . p-tertoctylphenol formaldehyde resin is usually prepared by condensation reaction of p-tertoctylphenol and formaldehyde under acid catalysis, and p-tertoctylphenol is alkylated by isobutylene dimer and pheno...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method of using 50% Na water in the alkylation reaction of the pre-prepared p-tero-octylphenol in view of the problems existing in the preparation process of the existing p-tero-octylphenol formaldehyde resin. --type sulfonated styrene-ethylene-diene copolymer strong basic anion exchange resin, which is converted into H-type sulfonated styrene-ethylene-diene copolymer strongly acidic cation-exchange resin as an alkylation catalyst for alkylation The method of preparing p-tetraoctylphenol, meanwhile, the condensation reaction of p-tetraoctylphenol and formaldehyde is selected to be carried out in toluene medium, and toluene is used as a builder and water to form a composite lotion for neutral resin slurry The preparation method of the separated rubber tackifier p-tertoctylphenol formaldehyde resin

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