Toner for developing electrostatic charge image
AssigneeKao Corporation
InventorsYuta Izumiya, Shogo Nomoto
Life of this patent
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Abstract
The present invention relates to a toner for development of electrostatic images which contains a colorant, a resin composition (P) and a resin composition (W), in which the resin composition (P) is a resin composition formed by subjecting an acid group-containing amorphous polyester-based resin (A) and an amine compound to condensation reaction, and the resin composition (W) is a resin composition formed by subjecting an alcohol component (W-al), a carboxylic acid component (W-ac) and a hydrocarbon wax containing at least one functional group selected from the group consisting of a hydroxy group and a carboxy group to condensation reaction; and a process for producing the toner.
Claims18
A toner for development of electrostatic images, comprising:
- a colorant;
- a resin composition (P);
- a resin composition (W);
- and
- an amorphous polyester-based resin (B),
- wherein:
- the resin composition (P) is a resin composition formed by subjecting an acid group-containing amorphous polyester-based resin (A) and an amine compound to a condensation reaction,
- the resin composition (W) is a resin composition formed by subjecting an alcohol component (W-al), a carboxylic acid component (W-ac), and a hydrocarbon wax comprising at least one functional group selected from the group consisting of a hydroxy group and a carboxy group to a condensation reaction, and
- the amorphous polyester-based resin (B) has a softening point that is higher than 120° C. and not higher than 170° C.
A process for producing a toner for development of electrostatic images, the process comprising:
- 1:
- subjecting an acid group-containing amorphous polyester-based resin (A) and an amine compound to condensation reaction to obtain a resin composition (P);
- and
- 2:
- melt-kneading toner raw materials comprising the resin composition (P) obtained in 1, a colorant, and a resin composition (W),
- wherein the resin composition (W) is a resin composition formed by subjecting an alcohol component (W-al), a carboxylic acid component (W-ac) and a hydrocarbon wax comprising at least one functional group selected from the group consisting of a hydroxy group and a carboxy group to condensation reaction, and
- wherein the toner comprises an amorphous polyester-based resin (B) having a softening point that is higher than 120° C. and not higher than 170° C.
Dependencies are inferred from the claim text.