Title:
SURFACE-MODIFIED METAL OXIDE POWDER AND PROCESS FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2011/007731
Kind Code:
A1
Abstract:
Disclosed is a surface-modified metal oxide powder obtained by subjecting a metal oxide powder to a surface treatment, characterized in that the ratio of the initial frictional charge (A) measured at 1 minute after the powder is dispersed in a ferrite carrier to the later frictional charge (B) measured at 30 minutes thereafter, A/B, is 1.0-2.0 and that the later frictional charge (B) is -300 to +300 µC/g. The surface-modified metal oxide powder is less electrifiable and has better stability over time of frictional charge than conventional ones. Consequently, the powder, when used as an external additive, stabilizes various properties including flowability and electrification characteristics without considerably reducing the properties of a developer or the like. Thus, problems such as blurring and a decrease in image quality can be minimized.
Inventors:
TASHIRO HIDEAKI (JP)
INOUE AKIRA (JP)
INOUE AKIRA (JP)
Application Number:
PCT/JP2010/061701
Publication Date:
January 20, 2011
Filing Date:
July 09, 2010
Export Citation:
Assignee:
NIPPON AEROSIL CO LTD (JP)
TASHIRO HIDEAKI (JP)
INOUE AKIRA (JP)
TASHIRO HIDEAKI (JP)
INOUE AKIRA (JP)
International Classes:
C01B13/14; C01B33/18; G03G9/08
Foreign References:
| JP2004231498A | 2004-08-19 | |||
| JP2007270124A | 2007-10-18 | |||
| JP2003192940A | 2003-07-09 | |||
| JP2005037909A | 2005-02-10 | |||
| JP2003316084A | 2003-11-06 | |||
| JP2009155435A | 2009-07-16 | |||
| JP2009209349A | 2009-09-17 | |||
| JP2009157079A | 2009-07-16 |
Other References:
WANG, Q. ET AL.: "Surface confined ionic liquid as a stationary phase for HPLC", THE ANALYST, vol. 131, 2006, pages 1000 - 1005
CHUNG, E. ET AL.: "Microcantilever Sensors with Chemically Selective Coatings of Ionic Liquids", AICHE J., vol. 53, no. 10, October 2007 (2007-10-01), pages 2726 - 2731
SHINJI OTANI: "Charge Control Technology in the Toner Surface", THE JOURNAL OF THE SURFACE FINISHING SOCIETY OF JAPAN, vol. 56, no. 8, 2005, pages 442 - 446
TOSHIHIKO KOGUCHI ET AL.: "Funtai no Sesshoku Taiden to sono Oyo", OYO BUTSURI, vol. 52, no. 8, 10 August 1983 (1983-08-10), pages 674 - 679
CHUNG, E. ET AL.: "Microcantilever Sensors with Chemically Selective Coatings of Ionic Liquids", AICHE J., vol. 53, no. 10, October 2007 (2007-10-01), pages 2726 - 2731
SHINJI OTANI: "Charge Control Technology in the Toner Surface", THE JOURNAL OF THE SURFACE FINISHING SOCIETY OF JAPAN, vol. 56, no. 8, 2005, pages 442 - 446
TOSHIHIKO KOGUCHI ET AL.: "Funtai no Sesshoku Taiden to sono Oyo", OYO BUTSURI, vol. 52, no. 8, 10 August 1983 (1983-08-10), pages 674 - 679
Attorney, Agent or Firm:
SUDA, MASAYOSHI (JP)
Masayoshi Suda (JP)
Masayoshi Suda (JP)
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