An ultraviolet absorbing monomer of formula (A):
wherein: R₄ and R5 are, independently, a substituted or unsubstituted alkylene with or without intervening oxygen, sulfur or nitrogen atoms; R₆ is H or a substituted or unsubstituted methyl; and the benzo ring, the hydroxy substituted phenyl ring and the phenyl ring of the styryl group may be further substituted or unsubstituted. A method of making such monomers and photographic elements containing UV absorbing polymers formed from such monomers are also provided.
式 (A) 的紫外线吸收单体:
其中R₄ 和 R5 独立地是取代或未取代的亚烷基,中间有或没有氧原子、
硫原子或氮原子;R₆ 是 H 或取代或未取代的甲基;苯偶氮环、羟基取代的苯基环和
苯乙烯基团的苯基环可进一步被取代或未被取代。本发明还提供了制造此类单体的方法以及由此类单体形成的含有紫外线吸收聚合物的照相元件。