Toner binder used for electrophotography, and toner for electrophotography

The present invention is aimed at providing a toner binder for electrophotography that is excellent in the fixing property, offset resistance, blocking property, grindability, durable developing property and the like to correspond to the high-speed movement of a copier. The purpose of the present in...

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Bibliographic Details
Main Author SAKATA ICHIYA,IWA KOWASHI,KAWASAKI SHOJI
Format Patent
LanguageEnglish
Published 13.09.2006
Subjects
CINEMATOGRAPHY
ELECTROGRAPHY
ELECTROPHOTOGRAPHY
HOLOGRAPHY
MAGNETOGRAPHY
PHOTOGRAPHY
PHYSICS
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Summary:The present invention is aimed at providing a toner binder for electrophotography that is excellent in the fixing property, offset resistance, blocking property, grindability, durable developing property and the like to correspond to the high-speed movement of a copier. The purpose of the present invention could be achieved by a toner binder having the following features for electrophotography. That is, when the viscoelasticity of the toner binder is measured in the temperature range of 50 to 200 DEG C and at a heating rate of 2 DEG C/min., the viscoelasticity curve in the temperature range of 100 to 200 DEG C showing the relationship between the storage modulus and temperature, in which curve the axis of ordinate is the logarithm (Pa) of storage modulus G' and the axis of abscissa is temperature ( DEG C), has a concave in the temperature range of 140 to 180 DEG C and has a minimum value of storage modulus G' at the bottom of the range, and this G' 0 and storage modulus G' 200 at 200 DEG C are G' 0 < G' 200 and the difference DELTA G' (G' 200 - G' 0 = DELTA G') is 300 Pa or more.
Bibliography:Application Number: CN20011041546