发明名称 |
Thermal imaging method |
摘要 |
A thermal imaging method is provided which employs as color-forming co-reactants, (a) a substantially colorless di- or triarylmethane compound possessing on the meso carbon atom within its triarylmethane structure an aryl group substituted in the ortho position with a nucleophilic moiety which is ring-closed on the meso carbon atom and (b) an electrophilic reagent which upon heating and contacting said di- or triarylmethane compound undergoes a bimolecular nucleophilic substitution reaction with the nucleophilic moiety to form a colored, ring-opened di- or triarylmethane compound.
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申请公布号 |
US4745046(A) |
申请公布日期 |
1988.05.17 |
申请号 |
US19860861376 |
申请日期 |
1986.05.14 |
申请人 |
POLAROID CORPORATION |
发明人 |
BORROR, ALAN L.;ELLIS, ERNEST W. |
分类号 |
B41M5/323;B41M5/337;C07D311/00;C07D311/88;C07D319/04;C07D405/00;C07D405/10;C07D417/00;C07D417/04;C07D491/00;C07D491/107;C07D513/00;C07D513/10;C09B11/00;C09B11/28;(IPC1-7):G03C1/72;G03C7/00 |
主分类号 |
B41M5/323 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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