发明授权
- 专利标题： Wash-off film containing synthetic amphoteric polymers
- 专利标题（中）： 含有合成两性聚合物的洗衣薄膜
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申请号： US879400申请日： 1986-06-27
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公开(公告)号： US4735887A公开(公告)日： 1988-04-05
- 发明人: Robert P. Foss , Daniel R. Fruge
- 申请人： Robert P. Foss , Daniel R. Fruge
- 申请人地址： DE Wilmington
- 专利权人： E. I. Du Pont de Nemours and Company
- 当前专利权人： E. I. Du Pont de Nemours and Company
- 当前专利权人地址： DE Wilmington
- 主分类号： G03F7/06
- IPC分类号： G03F7/06 ; C09H7/00 ; G03C1/005 ; G03C1/04 ; G03C1/053 ; G03C5/315 ; G03C1/06
摘要：
Sharper edges are obtained in silver halide wash-off films for tanning development when from 5 to 60% of the unhardened gelatin binder in one or more layers is replaced with a synthetic amphoteric polymer consisting essentially of at least one of each of three constituents: (a) carboxylic acid, (b) alkyl primary amine, and (c) secondary and/or tertiary amine, the amphoteric polymer having an isoelectric point of from 4 to 8.
公开/授权文献
- US06021452A Computer system capable of symmetrical processing 公开/授权日：2000-02-01
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