Patent ID: 6559264
Filing Date: 2003-05-06
Classification: C08G,C08J,C09D,C09K

Abstract:
An aliphatic and/or cycloaliphatic polyisocyanate having blocked isocyanate groups whereinA) 5-95 equivalent % of the isocyanate groups are blocked with an acidic CH ester, B) 5-95 equivalent % of the isocyanate groups are blocked with 1,2,4-triazole, C) 0-10 equivalent % of the isocyanate groups are blocked with a blocking agent different from A) and B), D) the percentages of A), B) and C add up to 100%, and E) said aliphatic and/or cycloaliphatic polyisocyanate having blocked isocyanate groups contains 0.05-1.0 mole of formaldehyde in chemically incorporated form, based on 1 equivalent of blocked NCO groups.