发明授权
- 专利标题: Process for the preparation of silver dispersions for filter layers and antihalation layers
- 专利标题(中): 用于制备过滤层和防晕层的银分散体的方法
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申请号: US753093申请日: 1976-12-21
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公开(公告)号: US4094811A公开(公告)日: 1978-06-13
- 发明人: Artur Botta , Anita VON Konig , Franz Moll , Christian Rasp , Johannes Hartl
- 申请人: Artur Botta , Anita VON Konig , Franz Moll , Christian Rasp , Johannes Hartl
- 申请人地址: DT Leverkusen-Bayerwerk
- 专利权人: Agfa-Gevaert Aktiengesellschaft
- 当前专利权人: Agfa-Gevaert Aktiengesellschaft
- 当前专利权人地址: DT Leverkusen-Bayerwerk
- 优先权: DT2559191 19751230
- 主分类号: G03C1/06
- IPC分类号: G03C1/06 ; C07D235/00 ; C07D239/00 ; G03C1/825 ; B01J13/00 ; G03C1/84
摘要:
The process for the preparation of silver dispersions for antihalation and filter layers in photographic material by reducing silver salts in the presence of a heterocyclic 5-membered or 6-membered compound which has a ##STR1## group in its 1,2,3-position and a 2-aminoalkyl or 2-hydroxyalkyl group or an alkylene chain which is linked through the 1- and 2-position. The process provides neutral grey silver dispersions without using cadmium salts, for the reduction of the silver salts.
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