Photosensitive compositions containing stilbazolium groups

A photosensitive polymer composition comprising a compound of the structure ##STR26## wherein ##STR27## represents a polyvinyl alcohol unit, R is hydrogen or alkyl, or alkoxy, n is an integer from 1 to 6, ##STR28## is a radical having the structure ##STR29## X is an anion, and Y is a monovalent radical having the structure ##STR30## and more particular, Y=phenyl and naphthyl unsubstituted or substituted with hydrogen, alkyl, alkenyl, alkoxy, analkyl, and R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are hydrogen, alkyl, alkenyl, alkoxy, aralkyl, substituted alkyl, substituted alkoxy, carboxyl, carboxyl ester, amino, substituted amino, amido, substituted amido, cyano, hydroxy, nitro, isocyanato, sulphonyl halide, and may be the same or different, or R.sub.2 taken together with R.sub.3 is methylenedioxy.