申请人:——
公开号:US20040077773A1
公开(公告)日:2004-04-22
Novel liquid curable gelling material are disclosed and based on the reaction between a polyol-capped isocyanate and an adduct of an anhydride and a polyol. The liquid gelling material forms a gel characterized by both urethane and ester linkages. In a specific embodiment, the two part curable liquid potting composition comprises in part A, a hydroxyl capped polyisocyanate, and less than 1000 ppm of free isocyanate, and in part B, an anhydride adduct of polybutadiene comprising a polybutadiene segment. The preferred polybutadiene segment has a molecular weight of from 500 and 20,000. In a second embodiment, the 2-part curable liquid potting composition comprises in part A: a polybutaidene polyol capped polyisocyanate containing less than 1000 ppm of free isocyanate, and in part B an anhydride adduct of a polyol having a molecular weight of from 500 and 20,000.
本发明公开了新型液态固化胶凝材料,该材料基于多元醇封端异氰酸酯与酸酐和多元醇的加合物之间的反应。液态胶凝材料形成的凝胶具有聚氨酯和酯连接的特点。在一个具体的实施方案中,双组分可固化液体灌封组合物的 A 部分包括羟基封端多异氰酸酯,游离异氰酸酯含量低于 1000 ppm;B 部分包括聚丁二烯的酸酐加合物,该加合物由聚丁二烯段组成。优选聚丁二烯段的分子量为 500 至 20,000 之间。在第二个实施方案中,双组分固化液体灌封组合物的 A 部分包括:游离异氰酸酯含量小于 1000 ppm 的聚丁二烯多元醇封端聚异氰酸酯;B 部分包括分子量介于 500 和 20,000 之间的多元醇的酸酐加合物。