Chemically prepared porous toner

• US 8,192,909 B2
• Filed: 12/21/2005
• Issued: 06/05/2012
• Est. Priority Date: 12/21/2005
• Status: Active Grant

• Current Assignee: Eastman Kodak Company
• Original Assignee: Eastman Kodak Company
• Inventors: Jin, Xin, Morgan, Jason, Havens, Charles T.
• Primary Examiner(s): Huff, Mark F
• Assistant Examiner(s): ZHANG, RACHEL L
• Application Number:
  US11/313,612
• Publication Number:
  US 20070141501A1
• Time in Patent Office: 2,358 Days
• Field of Search: 430/109.3, 430/111.4, 430/137.1, 430/137.15, 430/137.17
• US Class Current: 430/111.4
• CPC Class Codes: G03G 9/0806 whereby chemical synthesis of at least one of the toner components takes place
• CPC Class Codes: G03G 9/0825 characterised by their structure; characterised by non-homogenuous distribution of components microcapsular toners G03G9/093
• CPC Class Codes: G03G 9/08711 with esters of acrylic or methacrylic acid
• CPC Class Codes: G03G 9/08782 Waxes
• CPC Class Codes: G03G 9/08795 characterised by their chemical properties, e.g. acidity, molecular weight, sensitivity to reactants
• CPC Class Codes: G03G 9/08797 characterised by their physical properties, e.g. viscosity, solubility, melting temperature, softening temperature, glass transition temperature

Abstract

The present invention provides a porous toner. The porous toner has a porosity of greater that 20 percent. The toner can include vinyl polymers, copolymers of styrene monomers and polyesters. In addition a method of manufacture of the toner particles is provided.

Claims

1. A toner comprising:

a binder resin having a porosity of greater than 20 percent, wherein the binder resin comprises polymers formed from vinyl monomers.

2. The toner of claim of 1 further comprising at least one charge control agent.

3. The toner of claim of 1 further comprising at least one colorant.

4. The toner particles of claim 1 further comprising at least one surface treatment agent.

5. A toner comprising:

a binder resin comprising a styrene-butyl acrylate-divinyl benzene polymer having a porosity of greater than 20 percent.

6. The toner of claim of 5 further comprising at least one charge control agent.

7. The toner of claim of 5 further comprising at least one colorant.

8. The toner of claim 5 further comprising at least one surface treatment agent.

9. A method of manufacturing toner particles comprising:

preparing an organic solution of water-immiscible polymerizable vinyl monomers, a polymerization initiator and a pore generating compound;

preparing a aqueous solution of a stabilizer;

emulsifying the aqueous solution and organic solution to form a mixture;

polymerizing the monomers in the emulsified mixture to form porous polymer beads; and

removing the pore generating compound from the porous polymer beads;

wherein the pore generating compound comprises an alkane or silicone oil which is miscible with the polymerizable vinyl monomers and which is a precipitant for the polymerized monomers.

10. The method of claim 9 wherein the porous polymer beads comprises vinyl polymers of styrene, butyl acrylate and benzene.

11. The method of claim 9 wherein the organic solution further comprises a charge control agent.

12. The method of claim 9 wherein the organic solution further comprises a colorant.

13. The method of claim 9 wherein the organic solution further comprises a lubricant.

14. The method of claim 9 wherein the organic solution further comprises a wax.

16. The method of claim 9 wherein the pore generating compound comprises an alkane.

15. A method of manufacturing toner particles comprising:

preparing an organic solution of water-immiscible polymerizable vinyl monomers, a polymerization initiator and a pore generating compound;

preparing a aqueous solution of a stabilizer;

emulsifying the aqueous solution and organic solution to form a mixture;

polymerizing the monomers in the emulsified mixture to form porous polymer beads; and

removing the pore generating compound from the porous polymer beads;

wherein the pore generating compound comprises silicone oil which is miscible with the polymerizable vinyl monomers and which is a precipitant for the polymerized monomers.