公开(公告)号：EP3315631A1

公开(公告)日：2018-05-02

申请号：EP16814055.6

申请日：2016-05-10

申请人： DIC Corporation

发明人： MATSUOKA Ryuichi ,  OKA Yasutaka ,  NAGAHAMA Sadamu

IPC分类号： C23C26/00 ,  C08G18/00 ,  C08G18/10 ,  C08G18/66 ,  C09D5/02 ,  C09D5/08 ,  C09D175/04

CPC分类号： C08G18/00 ,  C08G18/10 ,  C08G18/66 ,  C09D5/02 ,  C09D5/08 ,  C09D175/04 ,  C23C26/00

摘要： The present invention provides a steel sheet surface treatment agent containing an aqueous urethane resin composition obtained by dispersing in (C) an aqueous medium a urethane resin obtained by reacting (A) a urethane prepolymer having an isocyanate group and (B) a terminator containing (b1) an alcohol solvent, wherein the urethane prepolymer (A) is obtained by reacting (a1) a polyol and (a2) a polyisocyanate containing an aromatic polyisocyanate, wherein the boiling point of the alcohol solvent (b1) is in the range of from 150 to 350°C and wherein the number average molecular weight of the alcohol solvent (b1) is 500 or less. The steel sheet surface treatment agent can form a coating film having excellent heat yellowing resistance, chemical resistance, and corrosion resistance and being capable of preventing deterioration of various types of metal substrates.

摘要翻译： 本发明提供一种钢板表面处理剂，其含有水性聚氨酯树脂组合物，所述水性聚氨酯树脂组合物通过在（C）水性介质中分散通过使（A）具有异氰酸酯基团的氨基甲酸酯预聚物与（B） b1）醇溶剂，其中氨基甲酸酯预聚物（A）通过使（a1）多元醇与（a2）含有芳香族多异氰酸酯的多异氰酸酯反应得到，其中醇溶剂（b1）的沸点范围为 150〜350℃，醇溶剂（b1）的数均分子量为500以下。 钢板表面处理剂可以形成具有优异的耐热黄变性，耐化学性和耐腐蚀性并且能够防止各种类型的金属基底劣化的涂膜。