填料对单组分聚氨酯密封胶性能的影响  

Influences of Fillers on Properties of One-component Polyurethane Sealant

作　　者：周晓 李波 卢立群 孙德文 万赟 刘玉亭 尹浩 

机构地区：[1]江苏苏博特新材料股份有限公司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》2015年第9期21-24,35,共5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MDI,增塑剂DOP合成得到;通过甲苯-二正丁胺法监测反应体系中异氰酸根含量,反应终点条件为80℃反应3.5 h左右。对密封胶作力学性能测试,发现硅烷偶联剂处理能够有效改善填料与密封胶体系的相容性,表现为最终密封胶产品拉伸强度、断裂伸长率及撕裂强度的提高。但偶联剂处理与否,对密封胶的硬度影响不大。The polyurethane sealant prepolymer was prepared by N220, 330N, MDI and DOP. The content of NCO was monitoring by the toluene-di-n-butylamine titration. The condition of reaction end was 80 ℃ and 3.5 h from the beginning. The mechanical test result shows that compatibility of filler/sea/ant system can be improved by modification of silane coupling agent, and demonstrated by the improvement of tensile strength, elongation at break and tear strength. However, the hardness of sealant was affected slightly by the modification of silane coupling agent.

关 键 词：聚氨酯密封胶 偶联剂 石英粉 性能 

分 类 号：TQ436.6[化学工程]