Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
METHOD FOR MANUFACTURING SURFACE-TREATED VAPOR PHASE SILICA PARTICLES, SURFACE-TREATED VAPOR PHASE SILICA PARTICLES, AND EXTERNAL ADDITIVE FOR TONER FOR ELECTROSTATIC CHARGE IMAGE DEVELOPMENT
Document Type and Number:
WIPO Patent Application WO/2022/176388
Kind Code:
A1
Abstract:
The present invention pertains to a method for manufacturing surface-treated vapor phase silica particles, said method being characterized by comprising: (A1) a step for adding 1,3-divinyl-1,1,3,3-tetramethyldisilazane to starting vapor phase silica particles and introducing vinyldimethylsilyl groups to the surface of the starting vapor phase silica particles to give pre-treated silica particles; and (A2) a step for adding hexamethyldisilazane to the pre-treated silica particles and introducing trimethylsilyl groups to the surface of the pre-treated silica particles to give surface-treated vapor phase silica particles. Thus, it becomes possible to provide surface-treated vapor phase silica particles that contain few coarse agglomerated particles and can impart good flowability when added to a toner and a method for manufacturing the same, and an external additive for a toner that comprises the surface-treated vapor phase silica particles.

Inventors:
MATSUMURA KAZUYUKI (JP)
NISHIMINE MASANOBU (JP)
ITOH YUSUKE (JP)
YAGI HISASHI (JP)
NAKAMURA TSUTOMU (JP)
SAKATUME YOSHITERU (JP)
Application Number:
PCT/JP2021/047691
Publication Date:
August 25, 2022
Filing Date:
December 22, 2021
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
SHINETSU CHEMICAL CO (JP)
International Classes:
C01B33/18; C01B33/12; G03G9/097
Foreign References:
JP2010528134A2010-08-19
JP2014201461A2014-10-27
JP2004145325A2004-05-20
JP2006099006A2006-04-13
JP2007034224A2007-02-08
JP2010085837A2010-04-15
Attorney, Agent or Firm:
YOSHIMIYA Mikio et al. (JP)
Download PDF: