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1. 发明授权

US5731134A Gelatin and polymer latex dispersion coating compositions 失效
标题翻译：明胶和聚合物胶乳分散涂料组合物
公开(公告)号：US5731134A
公开(公告)日：1998-03-24
申请号：US605237
申请日：1996-02-09
申请人： James Stephen Honan , John Bruce Walters , Thomas Haile Whitesides
发明人： James Stephen Honan , John Bruce Walters , Thomas Haile Whitesides
IPC分类号： G03C1/005 , G03C7/388 , G03C1/053 , C08K3/00 , G03C1/015
CPC分类号： G03C1/005 , G03C7/3882
摘要： Stable photographic coating compositions comprising a polymer latex are prepared by mixing an aqueous solution comprising gelatin with a latex dispersion of a polymer of the formula (A).sub.x (B).sub.y (C).sub.z where A and B are formed from nonionic monomers, C is formed from anionic monomers, and x, y and z are monomer weight fractions where x=0 to 1.0, y=0 to 1.0, x+y=about 0.98 to 1.0, and z=0 to about 0.02, wherein A, B, x and y are such that latex dispersions of polymers of the formula (A).sub.x (B).sub.y have calcium ion critical coagulation concentrations of less than 80 mM Ca.sup.+2 in gelatin solutions, wherein the gelatin of the aqueous solution mixed with the latex dispersion comprises a gelatin of low calcium ion content such that the coating composition has a calcium Ca.sup.2+ concentration of less than 2 mM. The method of the invention allows for the preparation of aqueous gelatin coating solutions comprising latex dispersions of polymers which are unstable in the presence of calcium ions. The process can yield dispersions and photographic elements with superior attributes, including dispersion stability, and photographic color reproduction, image preservability, and abrasion resistance.
摘要翻译：通过将包含明胶的水溶液与式（A）x（B）y（C）z的聚合物的胶乳分散体混合制备包含聚合物胶乳的稳定的照相涂料组合物，其中A和B由非离子单体形成，C为由阴离子单体形成，x，y和z是单体重量分数，其中x = 0至1.0，y = 0至1.0，x + y =约0.98至1.0，z = 0至约0.02，其中A，B， x和y使得式（A）x（B）y的聚合物的胶乳分散体在明胶溶液中具有小于80mM Ca + 2的钙离子临界凝固浓度，其中水溶液的明胶与胶乳混合分散体包含低钙离子含量的明胶，使得涂料组合物的Ca 2+浓度小于2mM。本发明的方法允许制备包含在钙离子存在下不稳定的聚合物胶乳分散体的含水明胶包衣溶液。该方法可以产生具有优异属性的分散体和照相元件，包括分散稳定性和照相色彩再现，图像保存性和耐磨性。

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