发明授权
US4501896A Phenylmercaptotetrazolo- and nitroindazolo masked development/image
modifiers
失效
苯基巯基四唑和硝基吲唑酮掩蔽开发/图像改性剂
- 专利标题： Phenylmercaptotetrazolo- and nitroindazolo masked development/image modifiers
- 专利标题（中）： 苯基巯基四唑和硝基吲唑酮掩蔽开发/图像改性剂
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申请号： US290497申请日： 1981-08-06
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公开(公告)号： US4501896A公开(公告)日： 1985-02-26
- 发明人: Dennis S. Donald , Ross A. Lee
- 申请人： Dennis S. Donald , Ross A. Lee
- 申请人地址： DE Wilmington
- 专利权人： E. I. du Pont de Nemours and Company
- 当前专利权人： E. I. du Pont de Nemours and Company
- 当前专利权人地址： DE Wilmington
- 主分类号： C07D257/04
- IPC分类号： C07D257/04 ; G03C7/305 ; C07D257/02 ; C07D231/54
摘要：
Novel nitrobenzyl compounds are incorporated into a photographic emulsion or developer for controlled release of development/image modifier compounds. This occurs imagewise only after developer oxidation products have been formed in the course of the development process. For example, nitrobenzyl-masked phenylmercaptotetrazole (PMT), incorporated into a silver halide emulsion, reacts with developer oxidation products via an electron transfer mechanism to release the potent development restrainer PMT.
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