A method for producing a polyurethane prepolymer having terminal isocyanate groups is provided wherein one or more polyisocyanates are reacted with one or more polyols and wherein at least one asymmetric diisocyanate, at least one polyol having an average molecular weight (M
n
) of 60 to 3000 g/mol, and at least one carboxamide catalyst are used. The ratio of isocyanate groups to hydroxyl groups is set in the range between 1.1:1 to 4:1.
提供了一种生产具有末端
异氰酸酯基团的聚
氨酯预聚物的方法,其中一种或多种多
异氰酸酯与一种或多种多元醇反应,至少一种不对称二
异氰酸酯、至少一种平均分子量(M
n
)的至少一种多元醇和至少一种羧酰胺催化剂。
异氰酸酯基团与羟基基团的比例设定在 1.1:1 至 4:1 之间。