申请人:INTERNATIONAL PAPER COMPANY
公开号:EP0217310A2
公开(公告)日:1987-04-08
Disclosed are novel compounds of the formula:
wherein:
X=-NR₅R₆, or -OR₇;
R₁ and R₂ are independently hydrogen, substituted or unsubstituted alkyl, haloalkyl, hydroxyalkyl, alkoxyalkyl, alkylaminoalkyl or arylalkyl having up to 18 carbons; cycloalkyl; phenyl or naphthyl; alkylphenyl, cyanophenyl, halophenyl or alkoxyphenyl substituents.
R₃ is hydrogen, benzyl, alkoxybenzyl, halobenzyl or alkylbenzyl, provided that if neither R₁ nor R₂ is hydrogen, then R₃ is hydrogen.
R₄ is a divalent aromatic group which is substituted or unsubstituted.
R₅, R₆, and R₇ are independently hydrogen, alkyl, hydroxyalkyl, haloalkyl, alkoxyalkyl, alkylaminoalkyl, acylaminoalkyl, aminoalkyl or phenylalkyl having up to 12 carbons; a cycloalkyl substituent; phenyl or naphthyl; an alkylphenyl, cyanophenyl, halophenyl or alkoxyphenyl substituent.
Furthermore, either R₁ and R₃ or R₁ and R₂ can be linked to form a heterocyclic ring system containing 3-10 atoms.
Additionally, R₅ and R₆ can be linked to form a heterocyclic ring system containing 3-10 atoms.
Y is an oxygen or sulfur atom. If Y is sulfur then n=1, if Y is oxygen then n=0 or 1.
These compounds are useful as high-quality dot promoting agents in negative-working photographic systems.
Disclosed as well are radiation-sensitive compositions and elements containing such dot promoting agents in combination with silver halide grains. These exposed compositions and elements when processed in a developer containing a dihydroxybenzene developing agent, a substituted benzotriazole, a sulfite preservative and an amine compound provide a method for the production of halftone dots possessing high image quality.
公开了式中的新型化合物:
其中
X=-NR₅R₆或-OR₇;
R₁和R₂独立地是氢、取代或未取代的烷基、卤代烷基、羟基烷基、烷氧基烷基、烷基氨基烷基或具有多达 18 个碳原子的芳基;环烷基;苯基或萘基;烷基苯基、氰苯基、卤代苯基或烷氧基苯基取代基。
R₃ 是氢、苄基、烷氧基苄基、卤代苄基或烷基苄基,但如果 R₁ 和 R₂ 都不是氢,则 R₃ 是氢。
R₄ 是取代或未取代的二价芳基。
R₅、R₆ 和 R₇ 独立地是氢、烷基、羟基烷基、卤代烷基、烷氧基烷基、烷基氨基烷基、酰氨基烷基、氨基烷基或具有多达 12 个碳原子的苯基烷基;环烷基取代基;苯基或萘基;烷基苯基、氰苯基、卤代苯基或烷氧基苯基取代基。
此外,R₁ 和 R₃ 或 R₁ 和 R₂ 可以连接形成含有 3-10 个原子的杂环系统。
此外,R₅ 和 R₆ 可以连接形成含有 3-10 个原子的杂环系统。
Y 是氧原子或硫原子。如果 Y 是硫原子,则 n=1;如果 Y 是氧原子,则 n=0 或 1。
这些化合物可用作底片工作照相系统中的高质量网点促进剂。
此外,还公开了含有此类网点促进剂和卤化银颗粒的辐射敏感组合物和元素。这些已曝光的组合物和元素在含有二羟基苯显影剂、取代苯并三唑、亚硫酸盐防腐剂和胺化合物的显影剂中进行处理时,可提供一种生产具有高图像质量的半色调网点的方法。