一步法松香改性壬基酚醛树脂的合成研究

摘要

Rosin modified nonylphenolic resin was synthesized by one-stepsynthesis in laboratory. The effects including reaction medium pH value, molar ratio of nonyl phenol/methyl aldehyde, nonyl phenol, rate of adding methyl aldehyde, and condensation time on quality of the product were investigated. The optimum conditions of synthesis were determined as follows: molar ratio of nonyl phenol/methyl aldehyde 1∶2.3, reaction medium pH value 9, ratio of para-/ortho-nonyl phenol more than 90∶10, and condensation time 3.5～4 h. The quality of the product by one-step synthesis are up to or over that of the product prepared by two-step synthesis.%在实验室内用一步法合成了松香改性壬基酚醛树脂。考察反应介质pH值、酚醛摩尔比、原料壬基酚、加醛速度和缩合保温时间对产品质量的影响，最佳合成条件为：酚醛摩尔比为1∶23，反应介质pH值为9，壬基酚对邻比大于90∶10，缩合保温时间为3.5～4h。此条件下合成的产品质量达到或超过二步法工艺。