Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
CATALYST FOR POLYCONDENSATION REACTION
Document Type and Number:
Japanese Patent JP2009221345
Kind Code:
A
Abstract:

To provide a catalyst for a polycondensation reaction which has high activity and thus is effective for curtailing the reaction time, and its production method; a polycondensed resin which is prepared by using the catalyst and is suitably usable as a binding resin for a toner; and an electrophotographic toner containing the polycondensed resin and having good flowability.

The catalyst consists of a compound obtained by bonding titanium to a pyrogallol compound having a benzene ring of which three hydrogen atoms adjacent to each other are each substituted by a hydroxyl group; and in other case, the catalyst consists of a compound obtained by reacting a titanium compound with a pyrogallol compound having a benzene ring of which three hydrogen atoms adjacent to each other are each substituted by a hydroxyl group. The production method of the catalyst is also provided. The polycondensed resin is obtained by polycondensing a raw material monomer in the presence of the catalyst. The electrophotographic toner contains the resin.


Inventors:
SHIRAI EIJI
Application Number:
JP2008000067214
Publication Date:
October 01, 2009
Filing Date:
March 17, 2008
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
KAO CORP
International Classes:
C08G85/00; C08G63/85; G03G9/087
Domestic Patent References:
JP2009029998A2009-02-12
Foreign References:
WO2007123090A12007-11-01
Attorney, Agent or Firm:
細田 芳徳