摘要
介绍预聚体法合成不黄变聚氨酯胶黏剂的基本工艺。实验确定IPDI/PBA3000体系的预聚最佳反应温度在90～95℃,预聚时间为3.0h,聚酯含水质量分数控制在0.05%以内,制备出的不黄变聚氨酯预聚体性能稳定。以1,6-己二醇为扩链剂,选择异氰酸酯指数为1.05;并在120～140℃下后熟化4～10h,常温下放置1周,制得的新型不黄变聚氨酯胶黏剂耐热性好、粘接强度高、综合性能优良。
A basic synthesis process of non-yellowing polyurethane adhesive by prepolymer method is introduced. The results show that optimal reaction temperature of polyester polyol and isophorone diisocyanate （PBA/IPDA） is 90～95℃, reaction time is 3.0h, moisture content of polyester polyol should be lower than 0.05%（mass fraction）. Using 1,6-hexandiol as chain extender, under the conditions of R value 1.05, post-curing temperature 120-140℃, post-curing time 4～10 h, room temperature for 1 week, novel nonyellowing polyurethane adhesive with good thermal stability, high peeling strength and good comprehensive performance was synthesized.
出处
《化学推进剂与高分子材料》
CAS
2008年第3期26-28,34,共4页
Chemical Propellants & Polymeric Materials
基金
河南省高等学校青年骨干教师资助计划项目(豫教高[2005]461号)
关键词
聚氨酯胶黏剂
不黄变聚氨酯
胶黏剂
预聚体
polyurethane adhesive
non-yellowing polyurethane
adhesive
prepolymer
