不同潜固化型单组分聚氨酯密封胶制备及其性能研究  

Research on Preparation & Properties of One-component Polyurethane Sealant Containing Different Latent Curing Agents

作　　者：李波 冉千平 孙德文 卢立群 万 杨冲 刘玉亭 尹浩 

机构地区：[1]江苏省建筑科学研究院高性能土木工程材料国家重点实验室,江苏南京211103

出　　处：《中国建筑防水》2014年第21期37-40,共4页China Building Waterproofing

基　　金：国家自然科学基金资助;项目批准号51208236

摘　　要：聚氨酯密封胶预聚物采用聚醚多元醇N220、330N,异氰酸酯4,4’二苯甲烷二异氰酸酯(MDI)合成得到,反应终点条件为80℃反应3.5 h左右;通过加入滑石粉和碳酸钙填料以及分散剂、消泡剂、催化剂、潜固化剂,制备得到潜固化型单组分聚氨酯密封胶。在两种潜固化剂各自理论添加量条件下,恶唑烷类潜固化剂对密封胶胶层的抑泡效果较好,但二亚胺类潜固化剂得到的密封胶样品力学性能较好。The polyurethane sealant prepolymer was prepared by N220, 330N and MDI. The condition of reaction end was 80℃ and 3.5 h from the beginning. Then the one-component polyurethane sealant containing latent curing agent was prepared by addition of talc, calcium carbonate filler, and dispersing agents, defoamers, catalysts and latent curing agent. The tests results of the samples showed that, for sealant layer the foam suppression of oxazolidine latent curing agent （PZ- 005） was better, but the mechanical properties of sealant sample obtained with two imines latent curing agent were better than other one.

关 键 词：聚氨酯密封胶 潜固化剂 制备 性能 

分 类 号：TU578[建筑科学—建筑技术科学] TU761.11