Uv curable coatings containing oxalanilide stabilizers, method of

Abstract

Disclosed is a coating composition which crosslinks upon exposure to ultraviolet radiation to produce a transparent coating. The coating composition comprises: (A) from 4 to 10 percent of an oxalanilide ultraviolet light (UV) stabilizer dissolved in the coating composition, the UV stabilizer corresponding to the formula ##STR1## in which R is C.sub.6-22 alkyl or C.sub.6-22 alkoxy, R.sub.1 and R.sub.2 are independently hydrogen, C.sub.1-8 alkyl, C.sub.1-12 alkoxy, C.sub.1-12 alkylthio, phenoxy or phenylthio, provided that R.sub.1 and R.sub.2 may not both be selected from alkylthio, phenoxy and phenylthio, and R.sub.3 is hydrogen or C.sub.1-8 alkyl; (B) from 20 to 80 percent of a radiation sensitive monomer having at least two addition polymerizable unsaturated bonds; (C) from 0.1 to 5.0 percent of a photopolymerization initiator; and (D) from 80 to 20 percent of an acrylic addition polymer having at least one amino group and having a number average molecular weight of about 8,000-70,000, the addition polymer being derived from a mixture of copolymerizable ethylenically unsaturated monomers containing a monomeric ethylenically unsaturated amine. The percentages of components (A), (B), (C) and (D) are by weight based on nonvolatile components (i.e., solids) of the coating composition.