公开(公告)号：US3816124A

公开(公告)日：1974-06-11

申请号：US20255871

申请日：1971-11-26

Applicant: POLAROID CORP

Inventor： KARGER E ,  MAC GREGOR P

IPC: C07D311/92 ,  G03C8/48 ,  G03C7/00 ,  G03C1/40 ,  G03C1/48 ,  G03C1/84 ,  G03C5/30 ,  G03C5/54

CPC classification number: C07D311/92 ,  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 phthalides and 3,3-disubstituted naphthalides wherein one of the 3,3-substituents is an indol-3-yl radical substituted with hydrogen on the heterocyclic N atom and the other of said 3,3 substituents is a p-hydroxycarbocyclic aryl radical selected from a 4''-hydroxy-1''-phenyl radical and a 4''hydroxy-1''-naphthyl radical.

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3,3-二取代的苯并二苯并呋喃和3,3-二取代的萘，其中3,3-取代基之一是在杂环N原子上被氢取代的吲哚-3-基基团，而所述3,3个取代基中的另一个 是选自4'-羟基-1'-苯基和4'-羟基-1'-萘基的对羟基碳环芳基。