Method to produce uretonimine-modified isocyanate composition

摘要

A method to produce uretonimine-modified isocyanate composition comprises - Providing an organic isocyanate composition having two or more isocyanate groups; - Reacting, in the presence of a suitable catalyst, said polyisocyanate composition to form uretonimine-modified isocyanate composition comprising carbodiimide groups and uretonimine groups; - terminating said reacting by the addition of an amount of oxalic acid mono alkyl ester halide.