A cycloaliphatic polyisocyanate compound, a process for the preparation thereof, a polyurethane therefrom, and an adhesive composition
申请人:Daicel Chemical Industries, Ltd.
公开号:EP0976723A2
公开(公告)日:2000-02-02
The invention relates to a cycloaliphatic polyisocyanate represented by general formula (1) described below,
in which Y1 is a divalent saturated aliphatic hydrocarbon residual group, for example, 3-isocyanatemethyl-5,5-dimethylcyclohexylisocyanate.
The invention also relates to a process for manufacturing the above polyisocyanate by a reaction for conversion into an isocyanate of 3-aminomethylcycloalkyl amines which is obtained by a reductive amination of 3-formylcycloalkanones or 3-formylcycloalkenones obtained by oxidation of 3-methyl group in 3-methylcycloalkanones or 3-methylcycloalkenones. Further, 3-isocyanatemethyl-5,5-dimethylcyclohexylisocyanate having the chlorine content of not more than 10 ppm is optionally obtained using dimethylcarbonate by a phosgene method or a nonphosgene method.
本发明涉及一种由下述通式(1)表示的环脂族多异氰酸酯、
其中 Y1 为二价饱和脂肪烃残基,例如 3-异氰酸酯甲基-5,5-二甲基环己基异氰酸酯。
本发明还涉及一种制造上述多异氰酸酯的工艺,该工艺是通过将 3-甲基环烷基胺或 3-甲基环烯酮中的 3-甲基基团氧化得到的 3-甲酰基环烷基酮或 3-甲酰基环烯酮还原胺化而得到的 3-氨甲基环烷基胺转化为异氰酸酯的反应。此外,氯含量不超过 10ppm 的 3-异氰酸甲基-5,5-二甲基环己基异氰酸酯可选择使用二甲基碳酸酯,通过光气法或非光气法获得。