Compounds and composition useful as dot promoting agents |
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| 申请号 | EP86113285.0 | 申请日 | 1986-09-26 | 公开(公告)号 | EP0217310A3 | 公开(公告)日 | 1989-02-01 |
| 申请人 | INTERNATIONAL PAPER COMPANY; | 发明人 | Resnick, Bruce M.; Wexler, Allan J.; | ||||
| 摘要 | 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. |
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