Title:
SILICA FINE POWDER AND USE THEREOF
Document Type and Number:
WIPO Patent Application WO/2016/013673
Kind Code:
A1
Abstract:
Provided is an external additive for a toner, which is suitable for producing a toner having excellent storage stability and chargeability. Silica fine powder suitable for being added to the external additive for a toner is also provided. The silica fine power has a specific surface area of 15-90 m2/g inclusive, a loose bulk density of 0.09-0.18 g/cm3 inclusive, a carbon content of 0.25-0.90 wt% inclusive, and a hydrophobicity of 60-75% inclusive. It is preferable that the ratio of the loose bulk density (A) of the silica fine powder after surface treatment to the loose bulk density (B) of the silica fine powder before the surface treatment, i.e., (A)/(B), be 1.05-1.60 inclusive.
Inventors:
SASAKI SHUJI (JP)
NITTA JUNYA (JP)
MIZUMOTO TAKAHISA (JP)
NITTA JUNYA (JP)
MIZUMOTO TAKAHISA (JP)
Application Number:
PCT/JP2015/071159
Publication Date:
January 28, 2016
Filing Date:
July 24, 2015
Export Citation:
Assignee:
DENKI KAGAKU KOGYO KK (JP)
International Classes:
C01B33/18; G03G9/08
Domestic Patent References:
| WO2013018704A1 | 2013-02-07 |
Foreign References:
| JP2007171713A | 2007-07-05 | |||
| JP2000264621A | 2000-09-26 | |||
| JP2002023414A | 2002-01-23 |
Attorney, Agent or Firm:
AXIS Patent International (JP)
Axis international patent business corporation (JP)
Axis international patent business corporation (JP)
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