Bio-based amorphous polyester resins for emulsion aggregation toners
First Claim
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1. A method of making an amorphous polyester resin, the method comprising:
- synthesizing isosorbide from D-glucose;
obtaining a mixture comprising a succinic acid obtained by a submerged culture anaerobic fermentation process, and an azelaic acid produced by oxidative cleavage of oleic acid with chromic acid or by ozonolysis; and
polycondensing the isosorbide synthesized from D-glucose with the mixture of succinic acid and azelaic acid in the presence of a catalyst to obtain the amorphous polyester resin;
wherein;
the ratio of isosorbide to the mixture of succinic acid and azelaic acid in the polyester resin is from about 40;
60 to about 60;
40 mol % of the polyester resin;
the succinic acid is present in an amount of from about 30 to about 60 mol % of the polyester resin;
the azelaic acid is present in an amount of from about 5 to about 20 mol % of the polyester resin; and
a total amount of succinic acid and azelaic acid present in the polyester resin is from about 40 to 60 mol %.
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Abstract
Disclosed are amorphous polyesters that contain only renewable resources designed for emulsion aggregation toner fabrication. The amorphous polyesters may be obtained from the mixture of three different monomers: 1,4:3,6-dianhydro-D-sorbitol (isosorbide), nonanedioic acid (azelaic acid), and butanedioic acid (succinic acid). Different polymer properties may be achieved depending on the ratio of these three monomers. By altering the ratio, polymers of high to low acid value can be obtained, as well as different ranges of glass transition temperatures.
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Citations
10 Claims
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1. A method of making an amorphous polyester resin, the method comprising:
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synthesizing isosorbide from D-glucose; obtaining a mixture comprising a succinic acid obtained by a submerged culture anaerobic fermentation process, and an azelaic acid produced by oxidative cleavage of oleic acid with chromic acid or by ozonolysis; and polycondensing the isosorbide synthesized from D-glucose with the mixture of succinic acid and azelaic acid in the presence of a catalyst to obtain the amorphous polyester resin; wherein; the ratio of isosorbide to the mixture of succinic acid and azelaic acid in the polyester resin is from about 40;
60 to about 60;
40 mol % of the polyester resin;the succinic acid is present in an amount of from about 30 to about 60 mol % of the polyester resin; the azelaic acid is present in an amount of from about 5 to about 20 mol % of the polyester resin; and a total amount of succinic acid and azelaic acid present in the polyester resin is from about 40 to 60 mol %. - View Dependent Claims (2, 3, 4)
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5. A method of forming toner particles, the method comprising:
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forming a slurry by mixing together; an emulsion containing an amorphous polyester resin obtained from a method comprising; synthesizing isosorbide from D-glucose; obtaining a mixture comprising a succinic acid obtained by a submerged culture anaerobic fermentation process, and an azelaic acid produced by oxidative cleavage of oleic acid with chromic acid or by ozonolysis; and polycondensing the isosorbide synthesized from D-glucose with the mixture of succinic acid and azelaic acid in the presence of a catalyst to obtain the amorphous polyester resin; optionally a wax; optionally a colorant; optionally a surfactant; optional a coagulant; and one or more additional optional additives; heating the slurry to form aggregated particles in the slurry; freezing aggregation of the particles by adjusting the pH; and heating the aggregated particles in the slurry to coalesce the particles into toner particles; wherein; the ratio of isosorbide to the mixture of succinic acid and azelaic acid in the polyester resin is from about 40;
60 to about 60;
40 mol % of the polyester resin;the succinic acid is present in an amount of from about 30 to about 60 mol % of the polyester resin; the azelaic acid is present in an amount of from about 5 to about 20 mol % of the polyester resin; and a total amount of succinic acid and azelaic acid present in the polyester resin is from about 40 to 60 mol %. - View Dependent Claims (6, 7, 8, 9, 10)
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Specification