发明授权
US5627017A Low melting point ionizable epoxy scavengers for residual magenta
couplers
失效
用于残留品红色成色剂的低熔点电离环氧清除剂
- 专利标题: Low melting point ionizable epoxy scavengers for residual magenta couplers
- 专利标题(中): 用于残留品红色成色剂的低熔点电离环氧清除剂
-
申请号: US427764申请日: 1995-04-25
-
公开(公告)号: US5627017A公开(公告)日: 1997-05-06
- 发明人: Krishnan Chari , Paul P. Spara , Sundaram Krishnamurthy
- 申请人: Krishnan Chari , Paul P. Spara , Sundaram Krishnamurthy
- 申请人地址: NY Rochester
- 专利权人: Eastman Kodak Company
- 当前专利权人: Eastman Kodak Company
- 当前专利权人地址: NY Rochester
- 主分类号: C07D303/16
- IPC分类号: C07D303/16 ; C07D303/22 ; C07D303/34 ; C07D303/42 ; C07D303/46 ; C07D405/12 ; C07F5/02 ; C07F9/655 ; G03C1/005 ; G03C7/392 ; G03C7/388
摘要:
Low melting point epoxy scavenger compounds are disclosed which contain a pH dependent ionizable group to facilitate migration of the scavenger from an adjacent scavenger layer (that does not contain any coupler) to an imaging layer (containing coupler and emulsion) of a photographic element at the pH of development. One aspect of the invention comprises a process of forming an aqueous dispersion of an epoxy compound of the structural formula SI: ##STR1## wherein: R is H, an alkyl group, or an aryl group; L.sub.1 is an alkyl group or an aryl group; L.sub.2 is --O--, --CO--, --S--, --SO.sub.2 --, --PO.sub.2 --, --CO.sub.2 --, --NHCO-- or --NHSO.sub.2 --, wherein L.sub.2 may be orientated in either direction; L.sub.3 is an alkyl group; m is 0 or 1; p is 0 or 1; and X is ##STR2## wherein R' is H or an alkyl or aryl group, with the proviso that where L.sub.2 comprises an ionizable group, X may also be an alkyl group or an aryl group; wherein the compound has a melting point of less than about 50.degree. C. and the process comprises adding the compound in a liquid state to an aqueous solution, and directly dispersing the compound in the aqueous solution. Thermal and photochemical yellowing of a color photographic element, such as a color print, is inhibited by incorporating such compounds into the photographic element.
公开/授权文献
- US5070629A Sweet spot sole construction 公开/授权日:1991-12-10
信息查询