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US 2011/0217647 A1Published application
Toner compositions and processes
AssigneeXerox Corporation
InventorsAllan K. Chen, Tie Hwee Ng, Edward Graham Zwartz, Michael S. Hawkins
Life of this patent
Estimating the term…
Abstract
Toners are provided which possess excellent blocking characteristics. The toners include cores including amorphous resins having low glass transition temperatures, amorphous resins having high glass transition temperatures, and crystalline resins, and shells including amorphous resins having high glass transition temperatures.
Claims20
A toner comprising particles comprising:
- a core comprising from about 8% to about 15% by weight of at least one amorphous resin having a glass transition temperature of from about 58.5° C. to about 66° C., in combination with from about 36% to about 43% by weight of at least one amorphous resin having a glass transition temperature of from about 53° C. to about 58° C., at least one crystalline resin, an optional wax and an optional colorant;
- and
- a shell comprising from about 25% to about 35% by weight of at least one amorphous resin having a glass transition temperature of from about 58.5° C. to about 66° C.
A toner comprising particles comprising:
- a core comprising from about 8% to about 15% by weight of at least one amorphous resin having a glass transition temperature of from about 58.5° C. to about 66° C., in combination with from about 36% to about 43% by weight of at least one amorphous resin having a glass transition temperature of from about 53° C. to about 58° C., at least one crystalline resin, at least one wax selected from the group consisting of polyethylene, polypropylene, and polybutene, and combinations thereof, and an optional colorant;
- and
- a shell comprising from about 25% to about 35% by weight of at least one amorphous resin having a glass transition temperature of from about 58.5° C. to about 66° C.
A toner comprising:
- a core comprising from about 8% to about 15% by weight of at least one amorphous polyester resin having a glass transition temperature of from about 58.5° C. to about 66° C., in combination with from about 36% to about 43% by weight of at least one amorphous resin having a glass transition temperature of from about 53° C. to about 58° C., at least one crystalline polyester resin, at least one wax selected from the group consisting of polyethylene, polypropylene, and polybutene, and combinations thereof, and an optional colorant;
- and
- a shell comprising from about 25% to about 35% by weight of at least one amorphous polyester resin having a glass transition temperature of from about 58.5° C. to about 66° C.,
- wherein the amorphous resin having a glass transition temperature of from about 58.5° C. to about 66° C., the amorphous resin having a glass transition temperature of from about 53° C. to about 58° C., or both, comprise an amorphous polyester resin of the formula:
- wherein R is a hydrogen or a methyl group, and m and n represent random units of the copolymer and m is from about 2 to about 10, and n is from about 2 to about 10, and
- wherein the at least one crystalline resin comprises a crystalline polyester resin of the formula:
- wherein b is from about 5 to about 2000 and d is from about 5 to about 2000.
4 more elements
Dependencies are inferred from the claim text.