A binder obtained by reaction of a combination of (a) a polydiene glycol having a hydroxyl group number of 1.8-2.1 and a number average molecular weight of 1,000-5,000, (b) a polydiene polyol having a hydroxyl group number from more than 2.1 to less than 4.0 and a number average molecular weight compound of 1,000-5,000, and (c) a diisocyanate.
一种粘合剂,由以下物质反应而成:(a) 羟基数为 1.8-2.1 和平均分子量为 1,000-5,000 的聚二 烯二醇,(b) 羟基数从 2.1 以上到 4.0 以下和平均分子量为 1,000-5,000 的聚二 烯多元醇,以及 (c) 二
异氰酸酯。