Blocked photographically useful compounds and photographic compositions,
申请人:Eastman Kodak Company
公开号:US04358525A1
公开(公告)日:1982-11-09
Photographically useful compounds such as photographic reagents and photographic dyes are blocked with a grouping which, under alkaline conditions, is cleaved from the compound by an intramolecular nucleophilic displacement reaction. The compounds are resistant to unblocking under storage conditions, but are uniformly unblocked under conditions encountered during photographic processing.