发明授权
- 专利标题： Method of producing water-soluble chain-extended gelatin, gelatin produced by the method, and silver halide photographic light-sensitive material containing the gelatin
- 专利标题（中）： 制备水溶性延伸链的明胶的方法，通过该方法制备的明胶和含有明胶的卤化银照相感光材料
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申请号： US09790557申请日： 2001-02-23
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公开(公告)号： US06689556B2公开(公告)日： 2004-02-10
- 发明人: Hiroshi Kawamoto , Hiroki Sasaki , Minoru Uchida
- 申请人： Hiroshi Kawamoto , Hiroki Sasaki , Minoru Uchida
- 优先权： JP2000-048166 20000224
- 主分类号： G03C1005
- IPC分类号： G03C1005
摘要：
Disclosed is a method of producing a water-soluble chain-extended gelatin subjecting a source a source gelatin having a first isoelectric point, in aqueous solution, to a partial crosslinking reaction to form a reaction mixture comprising a partially crosslinked gelatin having a second isoelectric point, filtering the reaction mixture, adjusting a pH value of the filtered reaction mixture to a value equivalent to the second isoelectric point ±1.5, and concentrating, drying and pulverizing the pH-adjusted reaction mixture.