申请人:Takeda Chemical Industries, Ltd.
公开号:EP0142838A2
公开(公告)日:1985-05-29
Polyurethane resin curable at low temperature and in a short time is prepared by contacting a compound having 1-oxa-3,5-diazine-2,4,6-trione ring as well as isocyanate groups, e.g. a reaction product of an aliphatic, alicyclic or aralkyl polyisocyanate, e.g. hexamethylene diisocyanate and carbon dioxide and a compound having active hydrogen, e.g. polyester polyol, with tert-amine, e.g. trimethylamine present in gaseous phase, at a temperature of 0-100°C. The ratio of the sum of the numbers of the trione ring and the isocyanate group to the number of the active hydrogen in the compound having the same is 0.1 to 10.
将具有 1-氧杂-3,5-二嗪-2,4,6-三酮环和异氰酸酯基团的化合物,例如脂肪族、脂环族或芳基多异氰酸酯(例如六亚甲基二异氰酸酯)与二氧化碳的反应产物,以及具有活性氢的化合物(例如聚酯多元醇),与叔胺(例如气相中的三甲胺)在 0-100°C 的温度下接触,可制备可在低温和短时间内固化的聚氨酯树脂。