Polymer substrates coated with stabilized polymeric coating composition

Claim 1

An article of manufacture comprising a polymeric substrate having a mar-resistant coating thereon, said coating consisting essentially of the acid catalyzed reaction product of a mixture of (1), (2) and (3), the amount of (1) and (2) ranging from about 5:1 to about 1:1, respectively, in which (1) is a saturated urethane prepolymer having terminal hydroxy groups which is the reaction product of materials consisting essentially of a mixture of (a) and (b), at a molar ratio of 1:2, respectively, in which (a) is an isocyanate-terminated urethane which is the reaction product of a mixture consisting essentially of (I) and (II), at a molar ratio of 1:2, respectively, in which (I) is a saturated diol having a molecular weight of from about 200 to about 3000 and (II) is a saturated organic diisocyanate and (b) is a monomeric, sterically bulky, polyhydric alcohol containing 2- 6 hydroxyl groups and being free of oxyalkylene units (2) is a polyalkylether of a polymethylol melamine and (3) is an ultraviolet light absorber comprising 2-[(2-hydroxy-5-t-octylphenyl)]benzotriazole or 2,2'-dihydroxy-4-methoxybenzophenone.