Benzotriazole-based UV absorbers and photographic elements containing
them
    11.
    发明授权
    Benzotriazole-based UV absorbers and photographic elements containing them 失效
    苯并三唑类紫外线吸收剂和含有它们的摄影元素

    公开(公告)号:US5683861A

    公开(公告)日:1997-11-04

    申请号:US735543

    申请日:1996-10-23

    摘要: An ultraviolet absorbing compound of formula (I) below, and photographic elements containing such a compound as an ultraviolet absorber: ##STR1## wherein: R.sub.4 is a substituted alkyl group, R.sub.4 may be further joined to either L or A* forming a ring and the benzo or phenyl ring shown may be further substituted or unsubstituted; L is a bivalent linking group; p is 0 or 1; A* is an alkyl group having an asymmetric carbon or asymmetric silicon atom, and; wherein the ultraviolet absorbing compound of formula (I) is a mixture of two enantiomers about the asymmetric carbon or silicon atom of A*.

    摘要翻译: 下述式(I)的紫外线吸收性化合物和含有紫外线吸收剂的化合物的照相元件:其中:R4是取代的烷基,R4可以进一步连接成L或A *形成 所示的环和苯环或苯环可以进一步被取代或未取代; L是二价连接基团; p为0或1; A *是具有不对称碳或不对称硅原子的烷基, 其中式(I)的紫外线吸收化合物是围绕A *的不对称碳原子或硅原子的两种对映异构体的混合物。