Magenta Toner

Patent metadata

Field	Value
Publication number	US-2016004175-A1
Application number	US-201414321785-A
Country	US
Kind code	A1
Filing date	Jul 1, 2014
Priority date	Jul 1, 2014
Publication date	Jan 7, 2016
Grant date	—

Abstract

A process for making a latex emulsion where distillation occurs at an elevated temperature is used to make resin particles with a conditioned surface which can be used to make magenta toner with increased efficiency.

First claim

We claim:

1 . A method of making a magenta toner comprising:
(a) making a latex by phase inversion emulsification (PIE) of a first emulsion comprising a first resin and a solvent, wherein solvent is distilled with said first emulsion exposed to a temperature above the Tg of an amorphous resin, the melting point of a crystalline resin or both when contained in said first emulsion; (b) combining the latex with a wax and a magenta colorant to form a second emulsion; (c) adding an aggregating agent to said second emulsion to form aggregated particles; and (d) coalescing said aggregated particles to form said magenta toner in commercial quantities,
wherein said magenta toner is produced in a higher yield, at a higher throughput, in less time, or a combination thereof, as compared to a similarly made control magenta toner comprising a control resin made with a solvent distillation temperature below the Tg of an amorphous resin, the melting point of a crystalline resin or both when contained in said control resin.

2 . The method of claim 1 , wherein said solvent comprises a mixture of methyl ethyl ketone (MEK) and isopropyl alcohol (IPA).

3 . The method of claim 1 , wherein said first resin comprises an amorphous polyester resin.

4 . The method of claim 1 , wherein said first resin comprises at least two amorphous polyester resins.

5 . The method of claim 4 , wherein one of said at least: two amorphous polyester resins comprises a low molecular weight amorphous resin or as high molecular weight amorphous resin.

6 . The method of claim 1 , wherein said magenta toner comprises a VD 84 /VD 50 or about 1.23 or less; an ND 50 /ND 16 of about 1.30 or less; or both.

7 . The method of claim 1 , wherein said first resin comprises a crystalline polyester resin.

8 . The method of claim 1 , wherein said magenta toner is produced at a throughput of at least about 700 kg/hr.

9 . The method of claim 1 , wherein said magenta toner is produced with a commercial yield at least about 1.5% greater than yield, of a magenta toner made with a latex not heat-treated.

10 . The method of claim 1 , wherein said magenta toner is produced commercially with a processing time at least about 1.5% shorter than processing time of a magenta toner made with a latex not heat-treated.

11 . The method of claim 1 , wherein said wax is in an amount from about 1 wt % to about 25 wt %.

12 . The method of claim 1 , wherein said magenta colorant is in an amount from about 3 wt % to about 15 wt %.

13 . The method of claim 1 , wherein said magenta colorant comprises pigment red (PR) 122, PR 185, PR192 PR202, PR206, PR235, PR269 or combinations thereof.

14 . The method of claim 1 , further comprising adding a latex to said aggregated particles of step (c) to form a shell.

15 . The method of claim 1 , wherein said latex comprises a metal resin.

16 . The method of claim 15 , wherein said metal resin comprises a calcium resinate, a beryllium resinate., a magnesium resinate, a strontium resinate, a barium resinate, a radium resinate, a zinc resinate, an aluminum resinate, a copper resinate, an iron resinate or combinations thereof.

17 . The method of claim 14 , wherein said latex comprises a metal resin.

18 . The method of claim 17 , wherein said metal resin is a calcium resinate, a beryllimn resinate, a magnesium :resinate a strontium resinate, a barium resinate, radium resinate, a zinc resinate, an aluminum resinate a copper resinate, an iron resinate or combinations thereof.

19 . The method of claim 1 , wherein said magenta toner comprises PR122, PR269 or combination thereof.

20 . The method of claim 1 , wherein said magenta toner comprises equal amounts of PR122 and PR269.

Assignees

• Xerox Corp

Inventors

• Li Shigeng
• Wolfe Christopher M
• Tin Randy P
• Godshall Eric
• Qiu Shigang
• Nguyen Peter V
• Schneider Jay L
• Schriever Linda S
• Malachowski Steven M
• Grillo Amy A
• Cheng Chieh-Min

Classifications

• G03G9/092 Primary

  Quinacridones · CPC title

• G03G9/0808 Primary

  by dry mixing the toner components in solid or softened state · CPC title

• G03G9/09335

  Non-macromolecular organic compounds · CPC title

• G03G9/09328

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

• G03G9/08797

  characterised by their physical properties, e.g. viscosity, solubility, melting temperature, softening temperature, glass transition temperature · CPC title