Patent ID: 6627725
Filing Date: 2003-09-30
Classification: C08G,C09D

Abstract:
A composition useful for successive or simultaneous addition obtaining a certain coating comprising:an isocyanate which is at least partially masked by a masking group formed from an agent of formula (I); Ar(R)n(Y-Z)m(OH)pâ€ƒâ€ƒ(I) wherein Ar is an aromatic residue on which is grafted n substituents R, m divalent groups Y, and polar functions Z chosen from nitriles and carbonyl groups, and p hydroxyl functions, wherein the sum of n+m+p is at most equal to the number of substitutable chain members, the isocyanate having a degree of liberation (with respect to the masking agent) at 120Â° C. of not more than 5% and wherein a carboxylic function in free form is present on the masking agent; a polyol having the following characteristics: a glass transition temperature which is at least equal to about 40Â° C.; a hydroxyl number at least equal to about 10 mg/g; an average molecular mass Mn at least equal to about 1000 g/mol; and an organic base in which the basic function is borne by a nitrogen or phosphorous atom, wherein the basic atom does not bear any hydrogen.