摘要
以3,5-二甲基吡唑、甲乙酮肟为封闭剂,制备解封温度较低的110～120℃封闭型多异氰酸酯;讨论了封闭剂种类,活性氢与异氰酸酯基团的量之比、反应温度、反应时间对封闭反应的影响;探讨了封闭物的解封反应,确定其解封温度。用红外光谱比较了封闭前后和加热解封后的预聚体的差别。
Blocked polyisocyanate with low release temperature （110 ℃- 120 ℃） was synthesized with 3, 5-dimethyl pyrazole or methyl-ethyl ketoxime as blocking agents. The effects of different blocking agents, the mol ratio （nit： nNCO）, reaction temperature and time on block reaction were studied. The release reaction of blocked prepolymer was discussed and the release temperature was determined. The IR spectra of the prepolymer, blocked prepolymer and blocked prepolymer released by heating were compared.
出处
《塑料工业》
CAS
CSCD
北大核心
2008年第B06期62-65,共4页
China Plastics Industry
关键词
多异氰酸酯
封闭剂
解封温度
3
5-二甲基吡唑
甲乙酮肟
Polyisocyanate
Blocking Agent
Release Temperature
3, 5-Dimethyl Pyrazole
Methyl-ethyl Ketoxime
