Patent ID: 6294619
Filing Date: 2001-09-25
Classification: C08G,C09D

Abstract:
A powder coating composition comprising a film forming resin system, wherein said film forming resin system comprises:a. a polymer component comprising a polyester polyol which comprises the reaction product of:i. a cycloaliphatic component which comprises the reaction product of:(1) a cycloaliphatic acid, and(2) a cyclic polyol, andii. a polyfunctional isocyanurate component which comprises at least one compound that has at least two groups reactive towards carboxylic groups, andb. a crosslinker component capable of crosslinking said polyester polyol, said crosslinker component comprising a polyfunctional isocyanate which is at least partially blocked with at least one of the following:i. a polyhydroxy aromatic compound having at least one of the following structures:HO--.PHI..sup.1 --R.sup.1 --.PHI..sup.1 --OHwhere .PHI..sup.1 consists of a phenylene group, and Rh is an alkylene group having 0 to 4 carbon atoms, orHO--.PHI..sup.2 --OHwhere .PHI..sup.2 consists of a phenylene group or a naphthylene group, orii. a mixture of the polyhydroxy aromatic compound and a hydroxy-functional ester compound.