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Title:
AMORPHOUS POLYESTER RESIN, BINDER RESIN FOR TONER FOR ELECTROSTATIC IMAGE DEVELOPMENT AND AMORPHOUS POLYESTER RESIN PRODUCTION METHOD
Document Type and Number:
WIPO Patent Application WO/2011/132319
Kind Code:
A1
Abstract:
Provided is an amorphous polyester resin capable of imparting sufficient levels of the mutually contradictory properties of hot offset resistance and cold offset resistance, which are significant issues in toners for electrostatic image development and that imparts satisfactory blocking resistance. Also provided are a binder resin for a toner for electrostatic image development and an amorphous polyester resin production method. The amorphous polyester resin is obtained by reacting a polyvalent carboxylic acid compound and a polyalcohol. The polyvalent carboxylic acid compound includes (a) the reaction product of an aromatic polyvalent carboxylic acid compound and a glycol with 2-4 carbon atoms in a proportion of 60 mol % or more relative to the total amount of the polyvalent carboxylic acid compound. The amorphous polyester resin has a glass transition point of 55-75 °C, a weight-average molecular weight of 10,000-50,000.

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Inventors:
HISHIDA TATSUHIRO (JP)
OGAWA KOJI (JP)
MORIYAMA YASUMICHI (JP)
HOSODA MASAAKI (JP)
TANABE KAZUO (JP)
Application Number:
PCT/JP2010/057282
Publication Date:
October 27, 2011
Filing Date:
April 23, 2010
Export Citation:
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Assignee:
NICCA CHEMICAL CO (JP)
HISHIDA TATSUHIRO (JP)
OGAWA KOJI (JP)
MORIYAMA YASUMICHI (JP)
HOSODA MASAAKI (JP)
TANABE KAZUO (JP)
International Classes:
G03G9/087; C08G63/66
Foreign References:
JP2001222138A2001-08-17
JP2008534715A2008-08-28
JP2007292946A2007-11-08
JP2007004033A2007-01-11
JP2001222138A2001-08-17
JPH11249339A1999-09-17
JP2004191623A2004-07-08
JPH0517562A1993-01-26
Other References:
See also references of EP 2562202A4
Attorney, Agent or Firm:
HASEGAWA Yoshiki et al. (JP)
Yoshiki Hasegawa (JP)
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Claims:



 
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