POLYISOCYANATE FOR COATING, ITS PRODUCTION, ITS USE, 2K-PUR-COATING AND MOISTURE-CURABLE 1K-PUR COATING

摘要

PROBLEM TO BE SOLVED: To obtain the subject polyisocyanate capable of giving permanently stable two pack type polyurethane coating films without adding a stabilizer by using a specific chain-extended polyol as a polyol component. ;SOLUTION: This polyisocyanate comprises the addition product of (A) an aliphatic, (alicyclic)aliphatic or alicyclic diisocyanate with (B) a polyol of formula I [A is H, a group of formula II (R is H, a 1-20C alkyl, a cycloalkyl, etc.; X is H, CH₃, CH₃-CO, a group of formula II] (hereinafter TAD-OH), and contains 2 NCO equivalents of the diisocyanate per OH equivalent of the TAD-OH. The polyisocyanate is a polyisocyanate containing a hindered amine stabilizer therein and used for coatings. Thereby, the polyisocyanate can give coatings enhanced in weather resistance and stable also after the passage of time.;COPYRIGHT: (C)1998,JPO