发明名称 |
NEAR-INFRARED TRANSMITTING BLACK AZO PIGMENTS |
摘要 |
Near-infrared transmitting black azo pigments are represented by the following formula (1) and have a crystalline form selected from the group consisting of a thin, long crystalline form and a leaf-shaped crystalline form. wherein R represents at least one group selected from the group consisting of lower alkyl groups having 1 to 3 carbon atoms and lower alkoxy groups having 1 to 3 carbon atoms, n stands for an integer of from 1 to 5; and, when n is other than 1, Rs may be the same or different. These near-infrared transmitting black azo pigments can be produced by treating the corresponding black azo pigments of the formula (1) with an alkali in an alcohol . Near-infrared transmitting black azo pigments compositions each comprises one or more of the near-infrared transmitting black azo pigments and a near-infrared transmitting material as a vehicle. |
申请公布号 |
CA2365794(C) |
申请公布日期 |
2007.09.11 |
申请号 |
CA20012365794 |
申请日期 |
2001.12.20 |
申请人 |
DAINICHISEIKA COLOR & CHEMICALS MFG. CO., LTD. |
发明人 |
OKAMOTO, HISAO;YANAGIMOTO, HIROMITSU;ZAMA, YOSHIYUKI;NAKAMURA, MICHIEI;ABE, YOSHIO;YAMAMIYA, SHIROU |
分类号 |
C09B57/04;C09B67/10;C09B29/01;C09B29/09;C09B29/36;C09B67/00 |
主分类号 |
C09B57/04 |
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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