PROCESS FOR PRODUCTION OF LIQUID DEVELOPER, AND LIQUID DEVELOPER PRODUCED BY THE PROCESS

Title:

PROCESS FOR PRODUCTION OF LIQUID DEVELOPER, AND LIQUID DEVELOPER PRODUCED BY THE PROCESS

Document Type and Number:

WIPO Patent Application WO/2007/000975

Kind Code:

A1

Abstract:

Disclosed is a process for production of a liquid developer for use in electrophotograph or electrostatic recording by coacervation method. The process can produce a liquid developer in which a coloring agent (e.g., a pigment) is included completely within a resin particle by distillation of a solvent while retaining the state where the coloring agent are finely dispersed and the resulting colored resin particle is small in particle size and has an excellent dispersion stability, and which has excellent optical properties. The process comprises preparing a mixture containing a pigment, a resin having a fixability, a solvent (A) which can dissolve the resin therein, a hydrocarbon solvent (B) which cannot dissolve the resin therein and has an SP value lower than that of the solvent (A) and at least one dispersing agent which is soluble in both of the solvents (A) and (B), and distilling away the solvent (A) from the mixture to cause the resin dissolved in the mixture to precipitate, whereby a colored resin particle having the pigment included therein is dispersed in the solvent (B).

Inventors:

IWASE TAKASHI (JP)
MAEDA HIROHITO (JP)
YODO TAKAAKI (JP)

Application Number:

PCT/JP2006/312720

Publication Date:

January 04, 2007

Filing Date:

June 26, 2006

Export Citation:

Click for automatic bibliography generation Help

Assignee:

SAKATA INX CORP (JP)
IWASE TAKASHI (JP)
MAEDA HIROHITO (JP)
YODO TAKAAKI (JP)

International Classes:

G03G9/12

Foreign References:

JP2000147840A	2000-05-26
JP2003241439A	2003-08-27
JP2002139871A	2002-05-17
JP2004021023A	2004-01-22
JP2001047840A	2001-02-20
JP2003241439A	2003-08-27
JP2002139871A	2002-05-17
JP2004021023A	2004-01-22
JP2005186113A	2005-07-14

Other References: