摘要
硫醇固化剂与环氧树脂的配合物可低温快速固化,广泛应用于胶粘剂领域,目前尚依赖进口。为促进硫醇固化剂的国产化,对硫醇固化剂的制备方法和应用进行了研究。实验表明,选用β-巯基丙酸与季戊四醇在酸性催化剂存在下酯化,然后再与环氧树脂进行扩链反应,可以制得黏度和使用配比均适用的硫醇固化剂,总产率为95%以上。用此固化剂与环氧树脂及叔胺混合后,能在5℃以下数分钟内固化。该合成方法工艺简单,易于控制,制得的硫醇固化剂黏度适中,与环氧树脂相溶性好,低温固化快,固化物无色透明等超过了进口产品。
To replace importing polythiol hardener, the synthesis method of polythiol hardener had been studied. The synthesis route was as follows: the polythiol ester was prepared by esterification reaction of β-mereaptopropionic acid with pentaerythritol in the presence of acid catalyst, and then, polythiol hardener was obtained from extension-chain of polythiol ester with epoxy resin. The total yield was more than 95 percent, polythiol/epoxy/tertiary amine system was cured in 5 minutes and its some properties such as hardening time, viscosity, mixture rate with epoxy resin and colorourless and transparent et al got better of importing products.
出处
《热固性树脂》
CAS
CSCD
2006年第3期15-16,19,共3页
Thermosetting Resin
关键词
硫醇固化剂
合成
扩链
环氧树脂
polythiol hardener
synthesis
extension-chain
epoxy resin