工艺技术

改性多硫醇固化剂的合成及其性能研究

  • 傅陈晨 ,
  • 李辉 ,
  • 杨习雨 ,
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  • 1. 武汉工程大学化工与制药学院,武汉430205;
    2. 瑞奇化工(湖北)有限公司,湖北荆州434200

网络出版日期: 2025-03-01

Synthesis and Properties of Modified Polythiol Epoxy Curing Agent

  • FU C C ,
  • LI H ,
  • YANG X Y ,
  • et al
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  • 1. School of Chemical Engineering and Pharmacy,Wuhan Institute of Technology,Wuhan 430205,China;
    2. Rich Chemical Co., Ltd., Jinzhou,Hubei 434200,China

Online published: 2025-03-01

摘要

分别以 γ-甲基丙烯酰氧基丙基三甲氧基硅烷(KH570)和甲基丙烯酸羟丙酯为原料,三乙胺为催化剂,通过硫醇点击反应对四(3-巯基丙酸)季戊四醇酯进行结构改性,得到含有机硅单元和羟丙酯单元的无臭味改性多硫醇固化剂 P(SH)3-Si和 P(SH)3-OH。以环氧树脂 E51为主体树脂, 2,4,6-三(二甲胺甲基)苯酚(DMP-30)为促进剂,自制的改性多硫醇固化剂 P(SH)3-Si和 P(SH)3-OH以一定比例复配为固化剂,制备了一系列高性能室温快速固化环氧胶黏剂。研究了多硫醇固化剂 P(SH)3-Si添加量对胶黏剂凝胶时间、黏度、硬度、拉伸强度、剪切拉伸强度和吸水率等性能的影响规律。结果表明:当 P(SH)3-Si添加量为 10%时,胶黏剂具有最佳的力学性能、黏结性能和耐水性。

本文引用格式

傅陈晨 , 李辉 , 杨习雨 , . 改性多硫醇固化剂的合成及其性能研究[J]. 涂料工业, 2025 , 55(3) : 36 -41 . DOI: 10.12020/j.issn.0253-4312.2024-317

Abstract

Using 3-(trimethoxysilyl)propyl methacrylate(KH570)and 2-hydroxypropyl methacrylate as raw materials and triethylamine as catalysts,we synthesized two modified polythiol curing agents P(SH)3-Si and P(SH)3-OH containing organic silicon units and hydroxypropyl ester units by click reaction,respectively. A series of high performance room temperature fast curingepoxy adhesives were prepared by using epoxy resin E51 as the main resin,2,4,6-tris(dimethylaminomethyl)phenol(DMP-30)as the promoter,and modified polythiol curing agents P(SH)3-Si and P(SH)3-OH as curing agent. The effects of addition of P(SH)3-Si on the properties of adhesive gel time,viscosity,hardness,tensile strength,shear tensile strength,and water absorption were studied. The results showed that when the fraction of P(SH)3-Si was 10%,the adhesive indicated excellent mechanical properties and good water resistance.
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