METHOD FOR PREPARING MODIFIED POLYISOCIANATE

摘要

PROBLEM TO BE SOLVED: To provide a method for preparing a liquid isocyante comprising a carbodiimide group and/or a urethonimine group and having excellent storage stability.

SOLUTION: The method for preparing a modified polyisocyanate by carbodiimidizing a polyisocyanate using a phospholine catalyst is characterized by comprising a step of terminating the carbodiimidizing reaction by adsorbing and inactivating the phospholine catalyst by virtue of silicon dioxide particles having a specific surface area of at least 400 m2/g and an oil absorption capacity of at least 180 ml/100 g.

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