发明名称 |
PROCESS FOR PRODUCTION OF SURFACE-COATED INORGANIC PARTICLES |
摘要 |
Nano-sized inorganic particles having uniform particle sizes and precisely controlled particle diameters have already been produced by synthesis in an organic solvent, but these nano-sized inorganic particles are hindered from dispersing in a polar solvent because of the adsorption of a long-chain fatty acid on the surfaces of the particles. Further, it was difficult to form nano-sized inorganic particles dispersible in a polar solvent by replacing the long-chain fatty acid coats. According to the invention, various surface-coated inorganic particles dispersible in polar solvents can be produced from fatty acid-coated inorganic particles by adding a temporary coating substance such as thiomalic acid to a nonpolar solvent containing fatty acid-coated inorganic particles dispersed therein to replace the fatty acid coats by the temporary coating substance, dispersing the inorganic particles coated with the temporary coating substance in a polar solvent, and then adding a coating substance dispersible in a polar solvent, e.g., citric acid to the obtained dispersion to replace the temporary coating substance coats covering the inorganic particles by the coating substance dispersible in a polar solvent. |
申请公布号 |
EP2184262(A1) |
申请公布日期 |
2010.05.12 |
申请号 |
EP20080791605 |
申请日期 |
2008.07.25 |
申请人 |
TOKYO INSTITUTE OF TECHNOLOGY |
发明人 |
HANDA, HIROSHI;HATAKEYAMA, MAMORU;ABE, MASANORI;SAKAMOTO, SATOSHI;MASAIKE, YUKA;NISHIO, KOSUKE;KITA, YOSHINORI;KISHI, HIROSHI |
分类号 |
C01G49/00;A61K49/00;B22F1/02;H01F1/20;H01F1/34;H01F1/36 |
主分类号 |
C01G49/00 |
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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