Patent ID: 6169141
Filing Date: 2001-01-02
Classification: C08G,C09D

Abstract:
A coating composition comprising: A) 25 to 50 wt. % of a polyisocyanate component, B) 5 to 20% wt. % of one or more polyamines corresponding to formula II: ##STR7## wherein X represents an n-valent radical which is inert towards isocyanate groups and is obtained by removing the primary amino groups from an organic polyamine having a number average molecular weight of 88 to 400 and containing n primary (cyclo)aliphatically bound amino groups, R.sup.1 and R.sup.2 are identical or different and represent organic radicals having 1 to 18 carbon atoms and n represents an integer of at least 2, C) 10 to 30 wt. % of one or more compounds having a number average molecular weight of 112 to 600 and corresponding to formula III: ##STR8## wherein R.sup.3 and R.sup.4 are identical or different and represent hydrogen or organic radicals having 1 to 18 carbon atoms and Z represents an m-valent radical which is inert towards isocyanate groups and is obtained by removing the primary amino groups from an organic polyamine having a number average molecular weight of 88 to 400 and containing m primary (cyclo)aliphatically bound amino groups and m represents an integer of .gtoreq.2, D) 0.1 to 5.0 wt. % of an acetal corresponding to formula IV: ##STR9## wherein R.sup.5 and R.sup.6 are identical or different and represent hydrogen or organic radicals having 1 to 18 carbon atoms, Y represents a divalent organic radical having 1 to 8 carbon atoms and Ph represents an optionally substituted phenyl radical wherein the optional substituents are selected from the group consisting of Cl, Br, or C.sub.1 -C.sub.4 -alkyl, E) 0.1 to 5.0 wt. % of castor oil. F) 0.1 to 10.0 wt. % of an organic solvent, G) 15 to 35 wt. % of a pigment and H) 0 to 10 wt. % of a coating additive other than D, F or G, wherein the sum of the percentages of components A to H is 100.