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(11) |
EP 1 840 151 A8 |
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CORRECTED EUROPEAN PATENT APPLICATION |
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published in accordance with Art. 158(3) EPC |
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Correction information: |
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Corrected version no 1 (W1 A1) |
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Corrigendum issued on: |
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12.12.2007 Bulletin 2007/50 |
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Date of publication: |
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03.10.2007 Bulletin 2007/40 |
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Date of filing: 27.12.2005 |
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International Patent Classification (IPC):
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| (86) |
International application number: |
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PCT/JP2005/023986 |
| (87) |
International publication number: |
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WO 2006/070846 (06.07.2006 Gazette 2006/27) |
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Designated Contracting States: |
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BE DE GB NL |
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Priority: |
27.12.2004 JP 2004375600
08.08.2005 JP 2005229754
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Applicant: KONISHI CHEMICAL IND. CO., LTD. |
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Wakayama 641-0007 (JP) |
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Inventors: |
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- MA, Chenghuan,
c/o KONISHI CHEMICAL IND. CO., LTD.,
Wakayama-shi,
Wakayama 641-0007 (JP)
- YAMAMOTO, Masamichi,
c/o KONISHI CHEMICAL IND. CO., LTD.,
Wakayama-shi,
Wakayama 641-0007 (JP)
- OI, Fumio,
c/o KONISHI CHEMICAL IND. CO., LTD.,
Wakayama-shi,
Wakayama 641-0007 (JP)
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Representative: Vossius & Partner |
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Siebertstrasse 4
81675 München
81675 München (DE) |
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ORGANIC-SOLVENT DISPERSION OF FINE POLYSILSESQUIOXANE PARTICLE, PROCESS FOR PRODUCING
THE SAME, AQUEOUS DISPERSION OF FINE POLYSILSESQUIOXANE PARTICLE, AND PROCESS FOR
PRODUCING THE SAME |
(57) An organic-solvent dispersion containing fine polysilsesquioxane particles stably
dispersed therein, which is obtained by adjusting the pH of an aqueous dispersion
of fine polysilsesquioxane particles to 2 to 9, subsequently adding an organic solvent
thereto, and then removing the water from the system; and an aqueous dispersion of
fine polysilsesquioxane particles having an appropriate average particle diameter,
which is obtained by adjusting the amount of a base catalyst to be used so as to be
in a specific range. The process for producing an aqueous dispersion of fine polysilsesquioxane
particles having a pH of 2 to 9 with an organic solvent. The process for producing
an aqueous dispersion of fine polysilsesquioxane particles having an average particle
diameter of 1 to 40 nm comprises mixing a dispersion stabilizer, a base catalyst,
and trialkoxysilane in the presence of an aqueous solvent to produce an aqueous dispersion
of fine polysilsesquioxane particles, and is
characterized in that the base catalyst is used in an amount of 4 to 45 mmol/L per total amount of the
aqueous solvent.