Naphthol sulfonamidonaphthalides
    28.
    发明授权
    Naphthol sulfonamidonaphthalides 失效
    萘酚磺酰胺苯酞

    公开(公告)号:US3892778A

    公开(公告)日:1975-07-01

    申请号:US45107774

    申请日:1974-03-14

    Applicant: POLAROID CORP

    Inventor: SIMON MYRON S

    CPC classification number: G03C8/48

    Abstract: This invention relates to a class of indicator dyes useful as optical filter agents in photographic processes to protect a selectively exposed photosensitive material from further exposure during processing in the presence of incident light. Such dyes comprise 3,3-disubstituted 6-sulfonamido naphthalides wherein the 3,3 substituents are p-hydroxynaphthyl radicals.

    Abstract translation: 本发明涉及一类指示剂染料,其用作照相工艺中的滤光剂,以在入射光的存在下保护选择性曝光的感光材料免于进一步曝光。 这样的染料包括3,3-二取代的6-亚磺酰氨基萘,其中3,3个取代基是对羟基萘基。

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