水性硅基多异氰酸酯固化剂的合成及性能  

Synthesis and Properties of Waterborne Silicon-Based Polyisocyanate Curing Agents

作　　者：吕夏阳[1] 颜爱军 李会宁 王江兵 曹德榕[1] 

机构地区：[1]华南理工大学化学与化工学院,广东广州510641 [2]肇庆千江高新材料科技有限公司,广东肇庆526238

出　　处：《高分子材料科学与工程》2013年第12期26-29,34,共5页Polymer Materials Science & Engineering

基　　金：肇庆高新区科技计划项目(肇高科[2012]2号)

摘　　要：烷氧基硅烷与聚乙二醇反应合成硅基聚醚（SPE）；SPE与六亚甲基-1，6-二异氰酸酯（HDI）三聚体反应合成了一系列水性硅基多异氰酸酯固化剂（WSiP）。发现WSiP中硅氧烷含量的增加能够降低产物黏度和提高NCO含量，并且能够提高双组分涂膜硬度和光泽；另外，随着SPE含量增加，双组分涂膜光泽和耐水性均有所提高；用红外光谱仪和热失重仪测试了双组分涂膜结构和耐热性能。结果表明，WSiP与水性丙烯酸树脂配制的双组分水性聚氨酯涂料硬度达到4H，清漆光泽123°～126°，耐水48h，10％热失重温度为285℃。A modified silicon-based polyether （SPE） was synthesized by trialkoxysilane and polyethylene glycol. A series of waterborne silicon-based polyisocyanate curing agents （WSiP） were synthesized by hexamethylene diisocyanate trimer and SDE. Increase of siloxane content in WSiP may reduce the viscosity of the product, increase NCO content, and improve the hardness and gloss of the two-component coating film. Increase of SPE content may improve the film gloss and water resistance of the two-component coating film. The structure and heat resistance ability of the two-component coating based on WSiP were characterized by FT-IR and TG. The results show that the film of the two-component waterborne polyurethane coating prepared with WSiP exhibits high hardness （4H）, strong water resistance （48 h）, film gloss of 123°-126° and 10% mass loss temperature of 285°C.

关 键 词：固化剂 烷氧基硅烷 双组分 聚乙二醇 硅基聚醚 

分 类 号：TQ630.493[化学工程—精细化工]