US 8,557,496 B2 · Chemical toner composition and method for preparing the same

Abstract

The present invention relates to a chemical toner composition and a method for preparing the same. The chemical toner composition includes: a resin emulsion; a pigment dispersion; a wax dispersion; and a dispersible polymer coagulant, wherein the dispersible polymer coagulant is a copolymer comprising unsaturated ester monomers and amino-containing monomers. Accordingly, the present invention uses a novel dispersible polymer coagulant to prepare uniform toner particles with excellent roundness and improved flowability and to reduce moisture absorption.

Claims20

Dependent claims

A method for preparing a chemical toner composition, comprising:

(A) providing a mixture solution including a resin emulsion, a pigment dispersion, a wax dispersion and a dispersible polymer coagulant being a copolymer comprising unsaturated ester monomers and amino-containing monomers;
(B) controlling the pH value of the mixture solution in a range of 4±2;
(C) performing an aggregation process at a temperature lower than the glass transition temperature of the resin emulsion;
and
(D) performing a fusion process at a temperature higher than the glass transition temperature of the resin emulsion.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

13/441,968Filed 9 Apr 2012 · division

Priority

TW 97133048 A29 Aug 2008

Published

US 2012/0189957 A126 Jul 2012

Granted

15 Oct 2013

Term ends

Not estimatedThe source records don’t support an estimate.

Classification7 codes

G03G 9/0804
Preparation methods: whereby the components are brought together in a liquid dispersing medium
G03G 9/08724
Comprising macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds: polyvinylesters
G03G 9/08728
Polymers of unsaturated acids or derivatives thereof: polymers of esters
G03G 9/08791
Macromolecular material not specially provided for in a single one of groups G03G9/08702 - G03G9/08775: characterised by the presence of specified…

Chemical toner composition and method for preparing the same

Life of this patent

Chemical toner composition and method for preparing the same

Life of this patent

Abstract

Claims20