发明名称 |
POSITIV ARBEITENDE THERMOGRAPHISCHE MATERIALIEN |
摘要 |
A positive-acting thermographic material which is black or dark colored in the unexposed condition turns white or light colored when exposed to elevated temperatures. The material comprises a binder, a dark colored complex of ferric iron with a ligand chosen from organothiophosphorus acids, and a white organophosphorus acid or its alkali or alkaline earth metal salt. At elevated temperatures a double decomposition reaction occurs giving the light colored complex of ferric iron with the organophosphorus acid. <IMAGE>
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申请公布号 |
DE3722731(A1) |
申请公布日期 |
1988.02.18 |
申请号 |
DE19873722731 |
申请日期 |
1987.07.09 |
申请人 |
MINNESOTA MINING AND MANUFACTURING CO. |
发明人 |
ROBERT WHITCOMB,DAVID |
分类号 |
C09K9/00;B41M5/28;(IPC1-7):B41M5/18;D21H5/00 |
主分类号 |
C09K9/00 |
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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