POLYURETHANE COATING COMPOSITION

摘要

PROBLEM TO BE SOLVED: To obtain a coating composition having improved coating film hardness and restoring property of coating film in a polyurethane-based soft coat.

SOLUTION: The two-pack type polyurethane coating composition comprises a main agent (A) consisting essentially of a polyester polyol (a) and a curing agent (B) consisting essentially of an allophanate-modified polyisocyanate (b). The polyester polyol (a) comprises a polybasic acid component composed of a nonaromatic polycarboxylic acid/an aromatic polycarboxylic acid in 80/20-40/60 (molar ratio). The allophanate-modified polyisocyanate (b) is an allophanate-modified polyisocyanate obtained from a monool (b1) having 32-400 number-average molecular weight and an aliphatic diisocyanate (b2).

COPYRIGHT: (C)2007,JPO&INPIT