发明授权
- 专利标题： Type of modified gelatin and its use in a DTR material
- 专利标题（中）： 改性明胶的类型及其在DTR材料中的用途
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申请号： US520990申请日： 1995-08-30
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公开(公告)号： US5536817A公开(公告)日： 1996-07-16
- 发明人: Eddy Michiels , Piet Kok , Johan Loccufier , Frank Michiels , Ludo Van Rompuy
- 申请人： Eddy Michiels , Piet Kok , Johan Loccufier , Frank Michiels , Ludo Van Rompuy
- 申请人地址： BEX Mortsel
- 专利权人： AGFA-GEVAERT, N.V.
- 当前专利权人： AGFA-GEVAERT, N.V.
- 当前专利权人地址： BEX Mortsel
- 优先权： EPX93201687 19930611
- 主分类号： C08L89/00
- IPC分类号： C08L89/00 ; C08H1/06 ; C09D189/00 ; G03C1/047 ; G03C8/06 ; G03C8/52 ; G03F7/07
摘要：
A modified gelatin is disclosed wherein part of the free carboxyl groups is replaced by modifiers having more acid end-standing groups chosen from --SO.sub.3 M, --OSO.sub.3 M, --SSO.sub.3 M, ---OPO(OH).sub.2, --OPO(OH)(OR.sup.2), --PO(OH).sub.2, --PO(OH)(OR.sup.2).In a preferred embodiment such a modified gelatin is incorporated in a DTR photographic material which after processing can serve as a lithographic printing plate. Thanks to the more hydrophilic character of the modified gelatin the differentiation between printing and non-printing areas is improved and toning at printing start-up is reduced.
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