Electrostatic image development toner
AssigneeKao Corporation
InventorsKunihiro KANO, Kanta NIIYA, Nobuaki OKAUCHI
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Abstract
An electrostatic image development toner containing an amorphous resin and a crystalline resin as binder resins. The amorphous resin contains an amorphous polyester resin (A) that is a polycondensate of an alcohol component (a) containing 80 mol % or more of an aliphatic diol (a1) and a carboxylic acid component (b), the alcohol component (a) contains 60 mol % or more of an aliphatic diol (a2) having 5 or 6 carbon atoms and having an alkyl group on a side chain, and the crystalline resin contains a crystalline polyester resin (C) that is a polycondensate of an aliphatic alcohol (c) and a carboxylic acid component (d).
Claims20
An electrostatic image development toner comprising an amorphous resin and a crystalline resin as binder resins,
- wherein the amorphous resin contains an amorphous polyester resin (A) that is a polycondensate of an alcohol component (a) containing 80 mol % or more of an aliphatic diol (a1) and a carboxylic acid component (b),
- the alcohol component (a) contains 60 mol % or more of an aliphatic diol (a2) having 5 or 6 carbon atoms and having an alkyl group on a side chain, and
- the crystalline resin contains a crystalline polyester resin (C) that is a polycondensate of an aliphatic alcohol (c) and a carboxylic acid component (d).
A method for producing an electrostatic image development toner comprising:
- aggregating in an aqueous medium resin particles into which an amorphous resin and a crystalline resin are incorporated together or separately to form aggregated particles;
- and
- coalescing the aggregated particles,
- wherein the amorphous resin contains an amorphous polyester resin (A) that is a polycondensate of an alcohol component (a) containing 80 mol % or more of an aliphatic diol (a1) and a carboxylic acid component (b),
- the alcohol component (a) contains 60 mol % or more of an aliphatic diol (a2) having 5 or 6 carbon atoms and having an alkyl group on a side chain, and
- the crystalline resin contains a crystalline polyester resin (C) that is a polycondensate of an aliphatic alcohol (c) and a carboxylic acid component (d).
Dependencies are inferred from the claim text.