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US 8,574,802 B2Granted
Toner compositions and processes
AssigneeXerox Corporation
InventorsValerie M. Farrugia, Guerino G. Sacripante, Rosa M. Duque
Life of this patent
Estimating the term…
Abstract
Environmentally friendly toner particles are provided which may include a bio-based amorphous polyester resin, optionally in combination with another amorphous resin and/or a crystalline resin. Methods for providing these toners are also provided. In embodiments, the bio-based amorphous polyester resin includes a biologically derived diol, such as 2,3-butanediol.
Claims17
A toner consisting of
- a bio-based amorphous polyester resin consisting of a dicarboxylic acid and 2,3-butanediol and a multi-functional acid;
- a crystalline polyester resin;
- and
- one or more ingredients selected from the group consisting of colorants, waxes, coagulants, and combinations thereof, and wherein said bio-based amorphous polyester resin is derived from natural biological materials of plant based feed stocks or vegetable oils, and wherein said bio-based amorphous polyester resin has a carbon/oxygen ratio of from 1.5 to 15, and wherein said bio-based amorphous polyester has an acid value of from 0.5 milligram KOH/gram to 100 milligrams KOH/gram.
1 more element
A toner consisting of
- a bio-based amorphous polyester resin derived from 2,3-butanediol present in an amount from about 5 percent by weight of the resin to about 80 percent by weight of the resin, and a dicarboxylic acid present in an amount of from about 5% by weight to about 60% by weight of the bio-based amorphous polyester resin and selected from the group consisting of succinic acid, azelaic acid, naphthalene dicarboxylic acid, dimer diacid, terephthalic acid, cyclohexane-1,4-dicarboxylic acid, and combinations thereof, and which resin optionally includes bio-based monomers in an amount of about 50% to 100% by weight of the resin;
- and wherein said bio-based amorphous polyester resin is derived from natural biological materials of plant based feed stocks or vegetable oils;
- a crystalline polyester resin;
- and
- one or more ingredients selected from the group consisting of colorants, waxes, coagulants, and combinations thereof, and wherein said toner consists of a core of said crystalline polyester and a shell of said amorphous polyester resin, and wherein said amorphous polyester has an acid value of from 10 milligrams KOH/gram to 30 milligrams KOH/gram.
2 more elements
A toner comprising
- an amorphous polyester resin derived from D-isosorbide, dimethyl naphthalene 2,6-dicarboxylate, 2,3-butanediol, a dicarboxylic acid selected from the group consisting of succinic acid, azelaic acid, naphthalene dicarboxylic acid, dimer diacid, terephthalic acid, cyclohexane-1,4-dicarboxylic acid, and combinations thereof, and a multi-functional acid selected from the group consisting of citric acid, citric acid anhydride, and combinations thereof;
- and wherein said amorphous polyester resin is derived from natural biological materials of plant based feed stocks or vegetable oils;
- wherein said amorphous polyester has an acid value of from 10 milligrams KOH/gram to 30 milligrams KOH/gram, a weight average molecular weight of from 1,500 to 150,000, and a melt viscosity of from 10 to 1,000,000 Pa*S at about 140° C.;
- a crystalline polyester resin;
- and
- one or more ingredients selected from the group consisting of colorants, waxes, coagulants, and combinations thereof,
- wherein the bio-based amorphous polyester resin has a carbon/oxygen ratio of from about 1.5 to about 15, and wherein the bio-based amorphous polyester resin includes bio-based monomers in an amount of from about 50% to about 100% by weight of the resin.
4 more elements
Dependencies are inferred from the claim text.