| abstract |
PROBLEM TO BE SOLVED: To provide a novel polyisocyanate blocked with a secondary amine and based on a linear aliphatic diisocyanate, whose organic solution has long-term stability and solidifies even after several months, for example, as a result of crystallization. A polyisocyanate having no tendency is provided. A storage stable blocked polyisocyanate is reacted with a polyisocyanate with a biuretizing agent, whereby 5-45 equivalents based on the total amount of all free and blocked NCO groups in the blocked final product. % Formula (I): [Chemical 1] Then at least 95 mol% residual free NCO groups of the formula R 1 R 2 NH, wherein R 1 and R 2 are each an aliphatic or alicyclic C 1 -C 12 alkyl group Block with a certain blocking agent. [Selection figure] None |