| 摘要 |
PURPOSE:To improve dispersion stability of a photographically useful material by incorporating the photographically useful material dispersed by an amphiphilic block graft polymer into a photograph constituting layer. CONSTITUTION:The photographically useful material dispersed by the amphiphilic block graft polymer is incorporated into the photograph constituting layer. The photograph constituting layer refers to constituting layers such as photosensitive silver halide emulsion layer, intermediate layer, surface protective layer or under coating layer formed on a base and may be constituted of any of these layers. The photographically useful material refers to materials to be added to the respective photograph constituting layers according to the purposes possessed by the layers, for example, couplers, UV absorbents and brightening agents. The usable range of the block graft polymer is 0.1-300wt.%, ore preferably 0.2-30wt.%, of the material to be dispersed by the same. The stable dispersion of the photographically useful material is thereby permitted. |
