Back to results
US 2011/0086306 A1Published application
Toner compositions
AssigneeXerox Corporation
InventorsRobert D. Bayley, Yuhua Tong, Timothy L. Lincoln, Grazyna E. Kmiecik-Lawrynowicz, Maura A. Sweeney, Daniel W. Asarese, Susan J. LaFica, Mark E. Mang
Life of this patent
Estimating the term…
Abstract
A toner having charge control agents which impart excellent triboelectric charging characteristics. In embodiments, the charge control agents include copolymers formed by an emulsion polymerization process.
Claims20
A composition comprising:
- a latex emulsion in combination with a charge control agent comprising a complex selected from the group consisting of polyhydroxyalkanoate quaternary phosphonium trihalozincate, metal complexes of dimethyl sulfoxide, and metal complexes of an alkyl derivative of an acid selected from the group consisting of salicylic acid, dicarboxylic acid derivatives, benzoic acid, oxynaphthoic acid, sulfonic acids, and combinations thereof;
- and
- a functional monomer possessing a carboxylic acid functionality.
A toner comprising:
- a resin, an optional colorant, and an optional wax;
- and
- a latex emulsion in combination with a charge control agent comprising a complex selected from the group consisting of polyhydroxyalkanoate quaternary phosphonium trihalozincate, metal complexes of dimethyl sulfoxide, and metal complexes of an alkyl derivative of an acid selected from the group consisting of salicylic acid, dicarboxylic acid derivatives, benzoic acid, oxynaphthoic acid, sulfonic acids, and combinations thereof, and a functional monomer possessing a carboxylic acid functionality,
- wherein the charge control agent is present in an amount from about 0.01 percent by weight to about 10 percent by weight of particles comprising the toner.
1 more element
A process comprising:
- contacting a latex emulsion with a charge control agent comprising a complex selected from the group consisting of polyhydroxyalkanoate quaternary phosphonium trihalozincate, metal complexes of dimethyl sulfoxide, and metal complexes of an alkyl derivative of an acid selected from the group consisting of salicylic acid, dicarboxylic acid derivatives, benzoic acid, oxynaphthoic acid, sulfonic acids, and combinations thereof, in combination with a functional monomer possessing a carboxylic acid functionality selected from the group consisting of beta carboxyethylacrylate, methacrylic acid, and acrylic acid, to form a blend;
- and
- mixing the blend at a speed of from about 100 rpm to about 450 rpm for a period of time of from about 400 minutes to about 660 minutes to form a latex comprising a charge control agent copolymer,
- wherein particles comprising the charge control agent copolymer are of a size of from about 15 nm to about 300 nm.
1 more element
Dependencies are inferred from the claim text.