Toner compositions and processes

Patent metadata

Field	Value
Publication number	US-10078282-B2
Application number	US-201514821624-A
Country	US
Kind code	B2
Filing date	Aug 7, 2015
Priority date	Aug 7, 2015
Publication date	Sep 18, 2018
Grant date	Sep 18, 2018

Abstract

Disclosed are toner compositions that include an amorphous polyester resin, a crystalline polyester resin, a colorant and a wax, and where the amorphous polyester resin contains in excess of zero weight percent of dodecylsuccinic anhydride to less than 16 weight percent of dodecylsuccinic anhydride, or where the amorphous polyester resin contains in excess of zero weight percent of dodecylsuccinic acid to less than 16 weight percent of dodecylsuccinic acid.

First claim

What is claimed is:

1. A toner composition comprised of a core of a first amorphous polyester resin, a second crystalline polyester, a wax and a colorant, and at least one shell encasing said core, and which shell is comprised of said first amorphous polyester resin, and a wax, wherein said first amorphous polyester resin is prepared by the polycondensation of an organic diol, an organic diacid, a polycondensation catalyst and a dodecylsuccinic anhydride present in an amount of from about 9.5 weight percent to about 12.8 weight percent or a dodecylsuccinic acid present in an amount of from about 9.5 weight percent to about 12.8 weight percent, which preparation results in a terpoly(propoxylated bisphenol A co-dodecylsuccinate)-terpoly(propoxylated bisphenol A co-terephthalate)-terpoly-(propoxylated bisphenol A co-dodecylsuccinate), terpoly-(propoxylated bisphenol Aterephthalate)-terpoly-(propoxylated bisphenol A-dodecenylsuccinate)-terpoly-(propoxylated bisphenol Afumarate)-(propoxylated bisphenol A-trimellitate), or, terpoly(propoxylated bisphenol A-terephthalate)-terpoly(propoxylated bisphenol A-dodecenylsuccinate)-terpoly(propoxylated bisphenol A-fumarate), and wherein said crystalline polyester resin is selected from the group consisting of poly(1,6-hexylene-1,12-dodecanoate), poly(1,9-nonylene-succinate), and poly(1,6-hexylene-succinate).

2. A toner composition in accordance with claim 1 wherein said amorphous polyester is a terpoly(propoxylated bisphenol A co-dodecylsuccinate)-terpoly(propoxylated bisphenol A co-terephthalate)-terpoly-(propoxylated bisphenol A co-dodecylsuccinate) or, a terpoly-(propoxylated bisphenol A-terephthalate)-terpoly-(propoxylated bisphenol A-dodecenylsuccinate)-terpoly-(propoxylated bisphenol A-fumarate)-(propoxylated bisphenol A-trimellitate), the crystalline polyester is poly(1,6-hexylene-1,12-dodecanoate); the colorant is a pigment, and wherein at least one of said dodecylsuccinic anhydride and said dodecylsuccinic acid is dodecylsuccinic anhydride present in an amount of 9.5 weight percent, or, 12.8 weight percent.

3. A toner composition in accordance with claim 1 wherein said toner has a blocking temperature of from about 52° C. to about 55° C., said crystalline polyester is poly(1,6-hexylene-1,12-dodecanoate, said amorphous polyester is terpoly-(propoxylated bisphenol A-terephthalate)-terpoly-(propoxylated bisphenol A-dodecenylsuccinate)-terpoly-(propoxylated bisphenol A-fumarate)-(propoxylated bisphenol A-trimellitate), and which toner is prepared by emulsion/aggregation/coalescence processes.

4. A toner composition in accordance with claim 1 wherein said amorphous polyester is present in an amount of from about 70 weight percent to about 80 weight percent, said crystalline polyester resin is present in an amount of from about 5 weight percent to about 12 weight percent, said wax is present in an amount of from about 4 weight percent to about 9 weight percent, and said colorant is present in an amount of from about 3 weight percent to about 10 weight percent of the solids, and wherein said crystalline polyester is poly(1,6-hexylene-1,12-dodecanoate).

Assignees

• Xerox Corp

Inventors

• Sacripante Guerino G
• Zhou Ke
• Hawkins Michael S
• Zwartz Edward G

Classifications

• G03G9/083

  Magnetic toner particles · CPC title

• G03G9/09371

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

• G03G9/0935

  specified by the core material · 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