申请人:E.I. DU PONT DE NEMOURS AND COMPANY
公开号:EP0271972A2
公开(公告)日:1988-06-22
This invention is directed to thermosetting coating compositions comprising hydroxy functional urethane modified polyester resin, blocked polyisocyanate crosslinking agent, diol modified blocked diisocyanate and polyamine having at least two amine groups selected from primary and secondary amine groups. The hydroxy functional urethane modified polyester resin is the product of polymerization of lactone monomers in the presence of hydroxy-containing urethane modified polyester precursor (i) having a number average molecular weight ( Mn) between about 1,000 and about 10,000, (ii) having a hydroxy number between about 30 and about 300, and (iii) containing between about 1 and about 10 urethane groups per molecule.
本发明涉及热固性涂料组合物,包括羟基官能聚氨酯改性聚酯树脂、封端多异氰酸酯交联剂、二元醇改性封端二异氰酸酯和至少有两个胺基团的聚胺,胺基团选自伯胺和仲胺。羟基官能聚氨酯改性聚酯树脂是内酯单体在以下含羟基聚氨酯改性聚酯前体存在下聚合的产物:(i) 平均分子量(Mn)在约 1,000 到约 10,000 之间;(ii) 羟基数在约 30 到约 300 之间;(iii) 每个分子含有约 1 到约 10 个聚氨酯基团。