2003 Fiscal Year Final Research Report Summary
Studies on the novel organic black pigments utilizing interactions between transition dipoles and calcination at high temperatures
| Project/Area Number |
14340216
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
機能・物性・材料
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| Research Institution | National University Corporation Yokohama National University |
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Principal Investigator |
MIZUGUCHI Jin Yokohama National University, Faculty of engineering, Professor, 大学院・工学研究院, 教授 (90281005)
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| Co-Investigator(Kenkyū-buntansha) |
MIYAZAKI Shuji Toyo Ink Manufacturing Co.Ltd., Director, 所長
TAKATOSHI Senju Yokohama National University, Faculty of engineering, Assistant, 大学院・工学研究院, 助手 (70322097)
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| Project Period (FY) |
2002 – 2003
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| Keywords | Organic pigment / Black pigment / Perylene / Crystal structure / Electronic structure |
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| Research Abstract |
Carbon black (CB) is an excellent black pigment on the market. CB is low-cost and extremely light and heat stable, as also characterized by a high hiding power. Because of this, CB is regarded as the perfect black pigment. However, it has recently been pointed out that CB includes benzpyrene and other impurities that induce cancers, because. CB is usually prepared by incomplete decomposition of hydrocarbons at elevated temperatures. There is also another issue concerning the inherent nature of the electrical conductivity of CB. An electrically-insulating black pigment is appropriate for LCD (liquid crystal display) color filter applications. For these reason, an attempt was made to develop a black pigment that is environmentally friendly and electrically insulating. Our idea is to realize a black pigment by two absorption bands which cover the whole visible region. The former band is due to individual molecules while the latter arises from intermolecular interactions between transition dipoles. We have carried out a series of investigations on perylene and its related compounds on the basis of the crystal structure and intermolecular interactions. Finally, we have achieved a black pigment with benzoimidazo perylene derivatives. The key technologies were to utilize interactions between transition dipoles and calcination at high temperatures.
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Research Products
(18 results)
