申请人:IMPERIAL CHEMICAL INDUSTRIES PLC
公开号:EP0032011A1
公开(公告)日:1981-07-15
A process for the production of a modified isocyanate by reacting a composition containing carbodiimide groups and free isocyanate groups with a diester of an aliphatic dicarboxylic acid in the presence of oxalic or formic acid.
The process permits the production of liquid forms of diphenylmethane diisocyanate useful in the manufacture of polyurethanes.
一种生产改性异氰酸酯的工艺,在草酸或甲酸存在下,使含有碳二亚胺基团和游离异氰酸酯基团的组合物与脂肪族二羧酸的二酯反应。
该工艺可生产出用于制造聚氨酯的液态二苯基甲烷二异氰酸酯。