公开(公告)号：US3873314A

公开(公告)日：1975-03-25

申请号：US30453772

申请日：1972-11-07

申请人： HORIZONS INC

发明人： WOO JAMES T K ,  GLOWE DONALD E ,  THORNTON J SCOTT

IPC分类号： C08J11/08 ,  G03C11/24 ,  G03C5/26 ,  C08G53/22

CPC分类号： G03C11/24 ,  C08J11/08 ,  Y02P20/582 ,  Y02W30/701

摘要： Polymers containing polyvinylidene halides are generally used as a subbing or anchoring layer between a polyester film base and a gelatin layer containing halides or other silver compounds. It has been found that the silver and silver compound containing gelatin layer can be separated cleanly from the polyester base with attendant removal of the polyvinylidene halide containing polymer from both the gelatin fractions and the polyester fraction by suitable treatment of the photographic film (whether exposed or unexposed) in polar aprotic solvents; somewhat less polar solvents comprising cyclic compounds taken from the class of aliphatic and aromatic hydrocarbons, ethers, sulfides, and ketones; and mixtures of polar aprotic solvents such as sulfoxides or amides in combination with the cyclic solvents as cosolvents. These solvents dissolve the polyvinylidene containing polymer while not affecting materially either the polyester base or the silver compound or silver metal containing gelatin layer. Of this group of solvents the polar aprotic solvents are the preferred species; mixtures of polar aprotic solvents and polar cyclic compounds being preferred next; and cyclic organic compounds which are less polar being the least preferred in view of the relatively high temperature required for suitable action. The preferred solvents are effective at room temperature, at elevated temperature below the boiling point of the solvent and in the vapor phase above the boiling point of the solvent.

摘要翻译： 含有聚偏二氯乙烯的聚合物通常用作聚酯膜基材和含有卤化物或其它银化合物的明胶层之间的底层或锚定层。 已经发现，含银明胶层的银和银化合物可以从聚酯基材干净地分离出来，通过适当地处理照相胶片（无论是曝光的还是暴露的或不可见的），从明胶部分和聚酯部分中随着去除含聚偏二卤乙烯的聚合物 未曝光）在极性非质子溶剂中; 包含从脂族和芳族烃类，醚类，硫化物和酮类中获得的环状化合物的极少量极性溶剂; 以及极性非质子溶剂如亚砜或酰胺与环状溶剂的组合作为助溶剂的混合物。 这些溶剂溶解含聚偏二烯聚合物，同时不影响聚酯基或银化合物或含银金属明胶层的物质。 在这组溶剂中，极性非质子溶剂是优选的物质; 接下来优选极性非质子溶剂和极性环状化合物的混合物; 考虑到合适的作用所需的相对较高的温度，极性较小的环状有机化合物是最不优选的。 优选的溶剂在室温下，在低于溶剂沸点的高温下和高于溶剂沸点的气相中有效。