| 摘要 |
1463700 Photographic subbing layers CIBAGEIGY AG 18 June 1975 [4 July 1974] 29664/74 Heading G2C [Also in Division B2] A photographic material comprises a film of biaxially oriented linear polyester (particularly polyethylene terephthalate) which may be treated, e.g. with a solution of a phenolic compound or by corona discharge, to improve the adhesion of a coating layer thereto, a first coating of a copolymer of vinylidene chloride, an alkyl acrylate or methacrylate, at least one copolymerizable acid, and a vinyl component of general Formula:- where T is -CN or -OCOCH 3 and P is -CN, -COCH 3 or -COC 6 H 5 where the phenyl group may be further substituted by e.g. halogen, nitro, alkyl or alkoxy groups, and a further coating of (a) a gelatine based layer over which may be coated a gelatine silver halide emulsion, or (b) a polyvinyl alcohol or polyvinyl metal layer which may have a lightsensitive diazonium salt incorporated therein or coated thereon. |
