Crystalline resins for toners
AssigneeKao Corporation
InventorsEiji Shirai, Tetsuya Ueno
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Abstract
The present invention relates to a crystalline resin for toners which includes a composite resin including a polycondensation-based resin component obtained by polycondensing an alcohol component containing an aliphatic diol having 2 to 10 carbon atoms with a carboxylic acid component containing an aromatic dicarboxylic acid, and a styrene-based resin component; a resin binder containing the crystalline resin and a non-crystalline resin; and a toner for electrophotography which contains the resin binder. According to the present invention, there are provided a crystalline resin for toners which is capable of producing a toner that is excellent in not only low-temperature fixing ability but also gloss of images and anti-filming property, a resin binder, and a toner for electrophotography.
Claims13
A crystalline resin for toners, comprising a composite resin comprising:
- a polycondensation resin component obtained by polycondensing an alcohol component comprising an aliphatic diol having 2 to 10 carbon atoms with a carboxylic acid component comprising an aromatic dicarboxylic acid, and
- a styrene-based resin component, wherein
- the alcohol component comprises the aliphatic diol having 2 to 10 carbon atoms in an amount of 70 to 100% mol %,
- the carboxylic acid component comprises the aromatic dicarboxylic acid in an amount of from 70 to 100 mol %,
- the crystalline resin has a value of from 0.6 to 1.4 for softening point/endothermic maximum peak temperature, and
- the composite resin is a resin obtained by polymerizing (a) monomers of the polycondensation resin component which comprise the alcohol component and the carboxylic acid component, (b) monomers of the styrene-based resin component and (c) a bireactive monomer capable of reacting with the monomers of the polycondensation resin component and the monomers of the styrene-based resin component.
Dependencies are inferred from the claim text.