发明授权
US4483798A Polyaddition products containing uretidione groups and process for their preparation 失效
含有脲基二酮基团的加成产物及其制备方法

Polyaddition products containing uretidione groups and process for their
preparation
摘要:
A method for producing a polyaddition product of isophorone diisocyanate and diols which comprises, reacting a uretidione group-containing dimer of isophoronediisocyanate, which is decomposable by heat into 98% isophorone diisocyanate, with a diol, wherein the ratio of NCO to OH groups is such that the final polyaddition product has free terminal NCO groups, or free terminal OH groups.
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