环氧树脂
材料科学
缩水甘油醚
涂层
溶剂
固化(化学)
聚乙二醇
相位反转
乳状液
复合材料
化学工程
甲苯
高分子化学
有机化学
化学
双酚A
膜
工程类
生物化学
作者
Kaijie Wang,Yuanyuan Li,Shilin Sang,Shijie Zhang,Lilin Chen,Tang Jia-ling
摘要
Abstract Most waterborne epoxy resin emulsifiers are inactive, and the free emulsifier will precipitate out during the curing of the coating film, which will seriously affect the water resistance, solvent resistance, and hardness of the coating film. Herein we prepared a new type of nonionic active epoxy emulsifier. First, 1,4‐butanediol diglycidyl ether reacts with polyethylene glycol at a higher temperature to form an epoxy‐terminated modified hydrophilic segment. Then 2,4‐toluene diisocyanate link the hydrophilic segment and the epoxy resin E‐31 (according the reactivity of the hydroxyl group on the epoxy resin E‐31) to obtain an emulsifier for emulsifying epoxy resins. The synthesized emulsifier's cloud point is 89°C and hydrophilic–lipophilic balance is about 13.1. The most suitable condition of the phase inversion is that the emulsification temperature is 60°C and the stirring speed is 1500 r min −1 . The coating films obtained from synthesized emulsifier is dense and uniform with excellent mechanical properties.
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