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    • 73. 发明授权
    • Optical filter agents and photographic products and processes containing
same
    • 光学过滤剂和含有它们的摄影产品和方法
    • US4298676A
    • 1981-11-03
    • US89559
    • 1979-10-29
    • Derek H. R. BartonIrena Y. Bronstein-BonteLloyd D. Taylor
    • Derek H. R. BartonIrena Y. Bronstein-BonteLloyd D. Taylor
    • G03C8/48G03C1/40G03C1/10G03C1/84G03C5/54
    • G03C8/48
    • Optical filter agents and photographic products and processes using same are disclosed. The optical filter agents are pH-sensitive hydrazone compounds conforming to the following structural formula: ##STR1## where R is any group which can provide a double bond for conjugation with the ##STR2## portion of the compound to provide light-absorbing capability or color for the agent at a pH above its pKa, X is a substituent of R providing at least one electron-withdrawing group and each R' can be defined as any substituent that does not impair the light-absorbing capacity of the compound at a pH above the pKa thereof. The pH-sensitive optical filter agents have a highly colored light-absorbing form at a pH above the pKa and are substantially non-absorbing at a pH below the pKa. The pH-sensitive optical filter agents are useful in photographic film units and processes for the protection of photoexposed photosensitive elements against the occurence of fogging during in-light development.
    • 公开了使用其的光学过滤剂和照相产品和方法。 光学过滤剂是符合以下结构式的pH敏感腙化合物:其中R是可以提供双键与化合物的部分缀合以提供光吸收能力或颜色的任何基团 对于高于其pKa的pH的试剂,X是提供至少一个吸电子基团的R的取代基,并且每个R'可以被定义为在上述pH以上不会损害化合物的光吸收能力的任何取代基 其pKa。 pH敏感的光学过滤剂在高于pKa的pH下具有高度着色的光吸收形式,并且在低于pKa的pH下基本上不吸收。 pH敏感的光学滤光剂可用于照相胶片单元和用于保护光敏元件的过程,以防止在光照显影过程中发生起雾。
    • 75. 发明授权
    • Polymeric optical filter agents and photographic products and processes
containing same
    • 聚合物光学滤光剂和含有它们的摄影产品和方法
    • US4269925A
    • 1981-05-26
    • US089558
    • 1979-10-29
    • Derek H. R. BartonIrena Y. Bronstein-BonteLloyd D. Taylor
    • Derek H. R. BartonIrena Y. Bronstein-BonteLloyd D. Taylor
    • G03C8/48G03C1/40G03C1/10G03C1/84G03C5/54
    • G03C8/48
    • Polymeric optical filter agents and photographic products and processes using same are disclosed. The polymeric optical filter agents are pH-sensitive optical filter agents comprising polymeric backbone units having the following hydrazone moiety: ##STR1## where R is a group which can provide a double bond for conjugation with the ##STR2## portion of the moiety to provide light-absorbing capability for the agent at a pH above its pKa, and X represents a substituent of R providing at least one electron-withdrawing group. The polymeric pH-sensitive optical filter agents have a highly colored light-absorbing form at a pH above the pKa and are substantially non-absorbing at a pH below the pKa. The polymeric optical filter agents are useful in photographic film units and processes for the protection of photoexposed photosensitive elements against the occurence of fogging during in-light development.
    • 公开了聚合物光学滤光剂和使用它们的照相产品和方法。 聚合物光学过滤剂是pH敏感的光学过滤剂,其包含具有以下腙部分的聚合物主链单元:其中R是能够提供双键以与该部分的“IMAGE”部分缀合以提供光的基团 - 在高于其pKa的pH下的试剂的吸收能力,X表示提供至少一个吸电子基团的R的取代基。 聚合物pH敏感光学过滤剂在高于pKa的pH下具有高度着色的光吸收形式,并且在低于pKa的pH下基本上不吸收。 聚合物光学滤光剂可用于照相胶片单元和用于保护光敏元件免于在光照显影过程中发生起雾的过程。
    • 79. 发明授权
    • Photographic products and processes employing pH sensitive filter dyes
    • 使用pH敏感的过滤染料的摄影产品和工艺
    • US4139381A
    • 1979-02-13
    • US836006
    • 1977-09-23
    • Stanley M. BloomAlan L. BorrorJames W. Foley
    • Stanley M. BloomAlan L. BorrorJames W. Foley
    • C07C43/225C07D275/06C07D279/02C07D417/10G03C8/48G03C8/54G03C7/00G03C1/40G03C1/84G03C5/54
    • C07D275/06C07C43/225G03C8/48
    • This invention is concerned with photographic products, particularly diffusion transfer photographic film units, useful in photographic processes conducted outside of a camera wherein post-exposure fogging by ambient light is prevented by a compound initially present as a substantially colorless compound which is activated by base to provide a light-absorbing reagent or colored optical filter agent which is capable of being irreversibly discharged without a change in pH. The colorless compound or filter agent precursor is initially disposed in a layer of the film unit, for example, in a layer coated over the photosensitive element. Subsequent to imagewise exposure of the photosensitive element, the colored optical filter agent is generated by contacting the colorless precursor with a basic processing composition. After remaining in contact with said basic composition for a given time, the colored optical filter agent is discharged by forming a new compound which is substantially colorless and which is different from and non-reversible to said precursor and different from and non-reversible to said optical filter agent.
    • 本发明涉及照相产品,特别是扩散转印照相胶片单元,其可用于在照相机外部进行的摄影过程中,其中通过环境光的曝光后雾化被最初作为基本上无色的化合物的化合物预防,所述化合物被碱活化, 提供能够在不改变pH的情况下不可逆地排出的吸光剂或有色光学过滤剂。 无色化合物或过滤剂前体最初设置在膜单元的层中,例如在涂覆在感光元件上的层中。 在感光元件成像曝光之后,通过使无色前体与基本处理组合物接触来产生着色光学滤光片。 在与所述碱性组合物保持接触一定时间后,通过形成基本无色的新化合物排出有色光学过滤剂,该化合物与所述前体不同且不可逆,并且不同于并且不可逆地转化为所述 光学过滤剂。