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Title:
HYDROPHOBIZED SPHERICAL POLY (ALKYL SILSESQUIOXANE) MICROPARTICLES, EXTERNAL ADDITIVE FOR TONER, DRY ELECTROPHOTOGRAPHY TONER, AND METHOD FOR MANUFACTURING HYDROPHOBIZED SPHERICAL POLY (ALKYL SILSESQUIOXANE) MICROPARTICLES
Document Type and Number:
WIPO Patent Application WO/2015/107961
Kind Code:
A1
Abstract:
Provided are: poly (alkyl silsesquioxane) microparticles that are hydrophobic and have a small particle diameter; an external additive for toner and a dry electrophotography toner using same; and a method for manufacturing hydrophobized spherical poly (alkyl silsesquioxane) microparticles. Hydrophobized spherical poly (alkyl silsesquioxane) microparticles for which the median diameter on a centrifugal sedimentation mass basis is in the range of 0.05 - 0.3 µm. Said microparticles are manufactured by passing at least through processes for mixing a starting material solution prepared using, for example, an alkyl trialkoxysilane with an alkaline aqueous medium to obtain a polycondensation reaction solution, then mixing said polycondensation reaction solution with an aqueous solution to obtain a microparticle dispersion, and then blending a hydrophobizing agent into said microparticle dispersion.

Inventors:
ISHIZU, Kenichi (1-1 Mikage-cho, Shunan-sh, Yamaguchi 48, 〒7458648, JP)
CHIKASHIGE, Yohei (1-1 Mikage-cho, Shunan-sh, Yamaguchi 48, 〒7458648, JP)
KOMATSUBARA, Tadaharu (1-1 Mikage-cho, Shunan-sh, Yamaguchi 48, 〒7458648, JP)
Application Number:
JP2015/050297
Publication Date:
July 23, 2015
Filing Date:
January 07, 2015
Export Citation:
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Assignee:
TOKUYAMA CORPORATION (1-1 Mikage-cho, Shunan-shi Yamaguchi, 48, 〒7458648, JP)
International Classes:
C08G77/04; C08J7/04; G03G9/08
Foreign References:
JPH01185367A1989-07-24
JPS63295637A1988-12-02
JPH11116681A1999-04-27
JPH01242625A1989-09-27
JPS63101854A1988-05-06
JPH0618879B21994-03-16
JP2003221222A2003-08-05
Other References:
See also references of EP 3095805A4
Attorney, Agent or Firm:
IAT WORLD PATENT LAW FIRM (7th Floor, HULIC Nakano Bldg. 44-18 Honcho 4-chome, Nakano-k, Tokyo 12, 〒1640012, JP)
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