Polyurethane polymers cured via azido-alkyne cycloaddition at ambient or mild curing conditions
申请人:Covestro LLC
公开号:US11312817B2
公开(公告)日:2022-04-26
An alternative polyurethane composition is provided which comprises a reaction product of an azidated polyol and a poly(alkynyl carbamate) prepolymer reacted at a temperature of from 20° C. to 120° C., wherein the poly(alkynyl carbamate) prepolymer comprises a reaction product of a polyisocyanate and a stoichiometric equivalent of an alkynol of the formula (I),
HC≡C—R1R2—OH (I),
and wherein R1 is an electron-withdrawing group selected from the group consisting of carbonyl, ester, amide, and urethane and R2 is a linear or branched alkyl chain having from 1 to 15 carbon atoms. The inventive alternative polyurethane composition position may be used to provide adhesives, sealants, films, elastomers, castings, foams, and composites.
提供了一种替代聚氨酯组合物,它包括叠氮化多元醇和聚(炔基氨基甲酸酯)预聚物在 20°C 至 120°C 的温度下反应的反应产物,其中聚(炔基氨基甲酸酯)预聚物包括多异氰酸酯和式 (I) 的炔醇的化学计量当量的反应产物、
HC≡C-R1R2-OH (I)、
其中 R1 是选自羰基、酯、酰胺和氨基甲酸乙酯的抽电子基团,R2 是具有 1 至 15 个碳原子的直链或支链烷基链。本发明的替代聚氨酯组合物可用于提供粘合剂、密封剂、薄膜、弹性体、铸件、泡沫和复合材料。