Fine polymer particles having heterogeneous phase structure, silver halide photographic light- sensitive material containing the fine polymer particles and image-forming method
申请人:FUJI PHOTO FILM CO., LTD.
公开号:EP0716338A2
公开(公告)日:1996-06-12
Latex polymer of fine particles having a heterogeneous phase structure which comprises a core of a polymer having repeating units derived from a conjugated diene monomer and a shell of a polymer having repeating units derived from at least one ethylenically unsaturated monomer carrying an active methylene group; a silver halide photographic light-sensitive material comprises a core/shell latex polymer whose shell consists of a polymer having repeating units of an ethylenically unsaturated monomer represented by the formula: CH₂=C(R¹)-L-X (wherein R¹ represents H, alkyl or halogen, L represents a single bond or a bivalent coupling group, X represents an active methylene group, provided that L is bonded to X in the form of alkylene; and a method for forming images on a silver halide light-sensitive material which comprises exposing the material which comprises at least one light-sensitive silver halide emulsion layer and at least one hydrophilic colloidal layer either of which comprises a latex polymer having active methylene groups and developing the exposed material with a developer which comprises a dihydroxybenzene developing agent and an auxiliary developing agent showing superadditivity, the pH increase observed when adding 0.1mole/ℓ developer of NaOH to the developer ≦ 0.25; 9.5 ≦ initial pH of the developer ≦ 11.0; the amount of the developer supplemented≦ 225 ml/m².
具有异相结构的细颗粒乳胶聚合物,其核由具有来自共轭二烯单体的重复单元的聚合物组成,壳由具有来自至少一种带有活性亚甲基的乙烯不饱和单体的重复单元的聚合物组成;卤化银感光材料由核/壳乳胶聚合物组成,其壳由具有由式表示的乙烯不饱和单体的重复单元的聚合物组成:CH₂=C(R¹)-L-X(其中R¹代表H、烷基或卤素,L代表单键或二价偶联基团,X代表活性亚甲基,条件是L以亚烷基的形式与X键合);以及一种在卤化银感光材料上形成图像的方法,该方法包括曝光该材料,该材料包括至少一个感光卤化银乳剂层和至少一个亲水胶体层,其中任一亲水胶体层包括具有活性亚甲基的乳胶聚合物,并用显影剂显影曝光的材料,该显影剂包括二羟基苯显影剂和显示超加成性的辅助显影剂,当加入 0.1mole/ℓ 显影剂的 NaOH 时观察到的 pH 值增加 ≦ 0.25;9.5 ≦ 显影剂的初始 pH ≦ 11.0;补充的显影剂量 ≦ 225 ml/m²。