Hyperpigmented low melt toner

Patent metadata

Field	Value
Publication number	US-9811017-B2
Application number	US-201615055370-A
Country	US
Kind code	B2
Filing date	Feb 26, 2016
Priority date	Feb 26, 2016
Publication date	Nov 7, 2017
Grant date	Nov 7, 2017

Abstract

A low melt toner includes a core having a core polystyrene-butyl acrylate resin, a crystalline polyester resin, a pigment present in an amount from about 7% to about 20% by weight of the low melt toner, and a paraffin wax; a ratio of the polystyrene-butyl acrylate resin to crystalline polyester resin is in a range from about 5:1 to about 7:1; and a shell disposed over the core including a shell polystyrene-butyl acrylate resin.

First claim

What is claimed is:

1. A low melt toner comprising:
a core comprising:
a core polystyrene-butyl acrylate resin;
a crystalline polyester resin;
a pigment present in an amount from about 7% to about 20% by weight of the low melt toner; and
a paraffin wax;
wherein a weight ratio of the polystyrene-butyl acrylate resin to crystalline polyester resin is in a range from about 5:1 to about 7:1; and

a shell disposed over the core comprising a shell polystyrene-butyl acrylate resin, wherein the shell polystyrene-butyl acrylate is present in a range from 25% to about 35% by weight of the low melt toner.

2. The low melt toner of claim 1 , wherein the core polystyrene-butyl acrylate resin is present in an amount from about 30% to about 50% by weight of the low melt toner.

3. The low melt toner of claim 1 , wherein the crystalline polyester resin is present in an amount from about 5% to about 10% by weight of the low melt toner.

4. The low melt toner of claim 1 , wherein the paraffin wax is present in a range from about 1% to about 10% by weight of the low melt toner.

5. The low melt toner of claim 1 , further comprising a second wax different from the paraffin wax.

6. The low melt toner of claim 5 , wherein the second wax is a Fischer-Tropsch wax.

7. The low melt toner of claim 6 , wherein the Fischer-Tropsch wax is present in a range from about 5% to about 8% by weight of the low melt toner.

8. A low melt toner comprising:
a core comprising:
a core polystyrene-butyl acrylate resin;
a crystalline polyester resin;
a pigment present in an amount from about 7% to about 20% by weight of the low melt toner; and
a paraffin wax;
wherein the core polystyrene-butyl acrylate and the shell polystyrene-butyl acrylate are the same, and further wherein a weight ratio of the polystyrene-butyl acrylate resin to crystalline polyester resin is in a range from about 5:1 to about 7:1; and

a shell disposed over the core comprising a shell polystyrene-butyl acrylate resin, wherein the shell polystyrene-butyl acrylate is present in a range from about 25% to about 35% by weight of the low melt toner.

9. The low melt toner of claim 1 , wherein the pigment is present in a range from about 8% to about 10% by weight of the low melt toner.

10. The low melt toner of claim 1 , wherein the pigment is carbon black.

11. A low melt toner comprising:
a core comprising:
a core polystyrene-butyl acrylate resin present in an amount in a range from about 35% to about 45% by weight of the low melt toner;
a crystalline polyester resin present in an amount in a range from about 5% to about 8% by weight of the low melt toner;
a pigment present in an amount in a range from about 7% to about 20% by weight of the low melt toner;
a Fischer-Tropsch wax present in an amount in a range from about 8% to about 10% by weight of the low melt toner; and
a paraffin wax present in an amount in a range from about 1% to about 3% by weight of the low melt toner; and
a shell disposed over the core comprising a shell polystyrene-butyl acrylate resin, wherein the shell polystyrene-butyl acrylate resin is present in an amount in a range from about 30% to about 35% by weight of the low melt toner.

12. The low melt toner of claim 11 , wherein the pigment is present in an amount in a range from about 8% to about 10% by weight of the low melt toner.

13. The low melt toner of claim 11 , wherein the low melt toner has a T g onset less than about 54° C.

14. The low melt toner of claim 11 , wherein the shell further comprises a wax.

Assignees

• Xerox Corp

Inventors

• Wolfe Christopher M
• Angra Padam K
• Myers Ii Jacob W

Classifications

• G03G9/09378 Primary

  Non-macromolecular organic compounds · CPC title

• G03G9/09364

  obtained by reactions only involving carbon-to-carbon unsaturated bonds · CPC title

• G03G9/09335

  Non-macromolecular organic compounds · CPC title

• G03G9/09321

  obtained by reactions only involving carbon-to-carbon unsaturated bonds · CPC title

• G03G9/0821

  characterised by physical parameters (magnetic parameters G03G9/083) · CPC title