Polymers photostabilized by novel imidazole-2-carboxanilides

A photostabilized polymer containing as photostabilizer one or more compounds of the formula ##STR109## where n is 1 or 2,

• R.sup.1 and R.sup.2 or one of the radicals R.sup.1 or R.sup.2 are each independently of the other phenyl, pyridyl, furyl, quinolyl or thiophenyl, which each are unsubstituted or substituted by C.sub.1 -C.sub.12 -alkyl, C.sub.1 -C.sub.12 -alkoxy, phenoxy, halogen or trifluoromethyl, and the other of the radicals R.sup.1 or R.sup.2 is hydrogen, C.sub.1 -C.sub.12 -alkyl, C.sub.7 -C.sub.9 -phenalkyl or --COOR.sup.5, where R.sup.5 is linear or branched C.sub.1 -.sub.12 -alkyl, C.sub.5 -C.sub.8 -cycloalkyl, phenyl or C.sub.7 -C.sub.10 -phenalkyl, where cycloalkyl and phenyl are unsubstituted or substituted by C.sub.1 -C.sub.4 -alkyl, or ##STR110## is a fused-on benzene ring which is unsubstituted or substituted by hydroxyl, halogen, C.sub.1 -C.sub.12 -alkyl, C.sub.1 -C.sub.12 -alkoxy, C.sub.7 -C.sub.9 -phenylalkyl, phenyl, --COOR.sup.6, --CO--R.sup.6, --CO--NH--R.sup.6, --COOH, --O--COR.sup.6, --NH--CO--R.sup.6, --SO.sub.2 --R.sup.6 or --CN, where R.sup.6 is linear or branched C.sub.1 -C.sub.12 -alkyl, C.sub.5 -C.sub.8 -cycloalkyl, phenyl or C.sub.7 -C.sub.10 -phenalkyl and the cycloalkyl and phenyl radicals are unsubstituted or substituted by C.sub.1 -C.sub.4 -alkyl,
• R.sup.3 and R.sup.4 are each hydrogen or one of the radicals R.sup.3 or R.sup.4 is C.sub.1 -C.sub.4 -alkyl or C.sub.7 -C.sub.9 -phenalkyl and,
• if n is 1,
• X (a) is phenyl, naphthyl or a 5- or 6-membered aromatic heterocyclic which may be benzofused, these radicals being unsubstituted or monosubstituted or disubstituted by C.sub.1 -C.sub.12 -alkyl, C.sub.1 -C.sub.12 -alkoxy, methylenedioxy, ethylenedioxy, phenoxy, C.sub.7 -C.sub.9 -phenylalkoxy, C.sub.7 -C.sub.9 -phenylalkyl, trifluoromethyl, hydroxyl, halogen, --S--R.sup.7, --COR.sup.7, --COOR.sup.7, OCOR.sup.7, --COOH, --CN, --CONH--R.sup.7, --NH--R.sup.7, --N(R.sup.7).sub.2 or --NH--COR.sup.7, where R.sup.7 is linear or branched C.sub.1 -C.sub.12 -alkyl, C.sub.5 -C.sub.8 -cycloalkyl, phenyl or C.sub.7 -C.sub.10 -phenalkyl, in which cycloalkyl and phenyl are unsubstituted or substituted by C.sub.1 -C.sub.4 -alkyl, or
• if n is 2
• X (b) is phenylene or naphthylene, these radicals being unsubstituted or substituted by C.sub.1 -C.sub.12 -alkyl, C.sub.1 -C.sub.12 -alkoxy or halogen, or
• (c) is a radical of the formula ##STR111## where Y is a radical of the formula --(CH.sub.2).sub.m, --CO--, --CO--(CH.sub.2).sub.p CO--, --OCO--(CH.sub.2).sub.p COO--, --NH--CO--(CH.sub.2).sub.p --CO--NH--, ##STR112## m is 1, 2 or 3, p is 0 or an integer from 1 to 8.