IP Library Granted Patent US 8,673,533
Granted Patent B2
US 8,673,533 · App. 13/686,221 · Granted Mar 18, 2014

Aqueous dispersions for use as toners

Inventors: John Klier (Midland, MI); Richard Dicran Varjian (Hutchinson, MN); Alastair Stewart Hill (Schonenberg, CH)
Assignee: Dow Global Technologies LLC
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Quick Facts
Patent No.
US 8,673,533
App. No.
13/686,221
Granted
Mar 18, 2014
Kind
B2
Abstract

A compound that includes an aqueous dispersion, wherein the dispersion includes a thermoplastic resin and at least one stabilizing agent, and at least one selected from the group consisting of a colorant and a magnetic pigment, wherein the dispersion has an average volume diameter particle size from about 0.05 to about 10 microns is described.

Claims (22)

1. A method for forming a toner, the method comprising:

forming a compound, the compound comprising:

an aqueous dispersion comprising:

a thermoplastic resin;

wherein the dispersion has an average volume diameter particle size from about 0.05 to about 10 microns; and

at least one selected from the group consisting of a colorant and a magnetic pigment; and

removing at least a portion of the water in the dispersion to form toner particles.

2. The method of claim 1 , wherein the forming the compound comprises melt kneading and dispersing the thermoplastic resin and optionally additional components in an extruder.

3. The method of claim 1 , wherein the forming the compound comprises;

melt kneading the thermoplastic resin and optionally additional compounds in a melt kneader to form a resin melt; and

dispersing the resin melt in an aqueous phase.

4. The method of claim 1 , wherein the thermoplastic resin is a self-stabilizing resin.

5. The method of claim 1 , wherein the dispersion further comprises a neutralizing agent.

6. The method of claim 5 , wherein the dispersion further comprises a stabilizing agent.

7. The method of claim 1 , wherein the dispersion further comprises a stabilizing agent.

8. The method of claim 1 , further comprising post-treating the toner particles.

9. The method of claim 8 , wherein the removing comprises spray-drying the compound.

10. The method of claim 1 , wherein the compound further comprises at least one of auxiliary fine particles, a charge control agent, a lubricant, and a polishing agent.

11. The method of claim 1 , wherein the thermoplastic resin comprises at least one polyester formed by reacting an aliphatic diol with a diacid.

12. A method of using toner formed in claim 1 , the method comprising:

disposing the toner formed in claim 1 in a process cartridge.

13. The method of claim 12 , further comprising attaching the process cartridge to an image forming device.

Assignments (7)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 5, 2013
From: KLIER, JOHN; VARJIAN, RICHARD D.
To: DOW GLOBAL TECHNOLOGIES INC.
Reel/Frame 031139/0769 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 5, 2013
From: HILL, ALASTAIR S.
To: DCOMCO INC.
Reel/Frame 031139/0867 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 5, 2013
From: DCOMCO INC.
To: DOW EUROPE GMBH
Reel/Frame 031139/0881 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 5, 2013
From: DOW EUROPE GMBH
To: THE DOW CHEMICAL COMPANY
Reel/Frame 031139/0981 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 5, 2013
From: THE DOW CHEMICAL COMPANY
To: DOW GLOBAL TECHNOLOGIES INC.
Reel/Frame 031140/0005 →
CHANGE OF NAME Recorded Sep 5, 2013
From: DOW GLOBAL TECHNOLOGIES INC.
To: DOW GLOBAL TECHNOLOGIES LLC
Reel/Frame 031157/0365 →
CHANGE OF NAME Recorded Sep 5, 2013
From: DOW GLOBAL TECHNOLOGIES INC.
To: DOW GLOBAL TECHNOLOGIES LLC
Reel/Frame 031157/0404 →
Continuity (4)
Continuation 13192374 · Jul 27, 2011
Division 11712206 · Feb 28, 2007
Provisional Application 60779126 · Mar 3, 2006
Related Publication 20130084522A1 · Apr 4, 2013