METHOD FOR MANUFACTURING BLOCK POLYISOCYANATE COMPOSITION

摘要

PROBLEM TO BE SOLVED: To provide a block polyisocyanate composition capable of forming a crosslinked coating film at a low temperature and also having high storage stability and a curing property retaining ratio after storage.

SOLUTION: The method for manufacturing the block polyisocyanate composition includes a first step for adding a malonic acid diester (b) and an active hydrogen-containing hydrophilic compound (d) to a polyisocyanate (a) having a polyisocyanate skeleton in an amount of 77-150 mol% relative to the isocyanate group of the polyisocyanate (a) as a total amount and reacting them, and a second step for reacting the product with a secondary amine compound (c).

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