# US 2013/0157187 A1 · Toners with Improved Dielectric Loss > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0157187 A1 - Document ID: US20130157187A1 - Status: Published application - Kind: A1 - Application number: 13/326,242 - Filed: 2011-12-14 - Published: 2013-06-20 - Earliest claimed: 2011-12-14 - Assignees: Xerox Corporation - Inventors: Ke Zhou; Rina Carlini; Daryl W. Vanbesien; Cuong Vong; Karen A. Moffat; Richard P.N. Veregin - Web page: https://patentgrep.com/patent/US20130157187A1 ## CPC - G03G 9/09733: {Organic compounds (G03G9/08782 takes precedence)} - B82Y 30/00: Nanotechnology for materials or surface science, e.g. nanocomposites - C09C 1/48: Carbon black - C09C 1/56: Treatment of carbon black {; Purification} - C09C 3/08: Treatment with low-molecular-weight {non-polymer} organic compounds {(C09C3/006, C09C3/048 take precedence)} - C09D 17/001: {in aqueous medium (C09D17/003, C09D17/004 take precedence)} - C09D 17/005: {Carbon black} - G03G 9/0804: {whereby the components are brought together in a liquid dispersing medium} - G03G 9/0821: {characterised by physical parameters (magnetic parameters G03G9/083)} - G03G 9/08775: {Natural macromolecular compounds or derivatives thereof} - G03G 9/08795: {characterised by their chemical properties, e.g. acidity, molecular weight, sensitivity to reactants} - G03G 9/08797: {characterised by their physical properties, e.g. viscosity, solubility, melting temperature, softening temperature, glass transition temperature} - G03G 9/09328: {obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds} - C01P 2004/62: Submicrometer sized, i.e. from 0.1-1 micrometer - C01P 2004/64: Nanometer sized, i.e. from 1-100 nanometer - G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY - B82Y: SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES - C09C: TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES (treatment of materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone C04B14/00, C04B18/00, C04B20/00); PREPARATION OF CARBON BLACK {; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS} - C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D) - C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS ## Abstract The disclosure describes a pigment treated with a rosin and a toner particle containing that rosin-treated pigment particle. The toner has a lower level of dielectric loss. ## Claims ### Claim 1 A surface-treated pigment particle comprising on a surface thereof, a rosin compound. ### Claim 2 (depends on 1) The surface-treated pigment particle of claim 1, wherein said rosin compound is one or more of a rosin acid, a rosin ester, a modified rosin acid or ester, a hydrogenated rosin acid or ester, or a dimerized rosin acid or ester. ### Claim 3 (depends on 1) The surface-treated pigment particle of claim 1, wherein said rosin compound comprises from about 0.1 wt % to about 20 wt % of said particle. ### Claim 4 (depends on 1) The surface-treated pigment particle of claim 1, wherein said pigment comprises a black pigment. ### Claim 5 (depends on 1) The surface-treated pigment particle of claim 1, wherein said rosin compound coats the entire surface of said pigment particle. ### Claim 6 (depends on 1) A composition comprising a resin and the surface-treated pigment particle of claim 1. ### Claim 7 (depends on 6) A toner particle comprising the composition of claim 6, comprising reduced dielectric loss as compared to toner comprising pigment lacking a rosin compound. ### Claim 8 (depends on 7) The toner particle of claim 7, further comprising an amorphous resin; an optional crystalline resin; an optional surfactant; an optional wax and an optional second colorant. ### Claim 9 (depends on 7) The toner particle of claim 7, which is hyperpigmented. ### Claim 10 (depends on 7) The toner particle of claim 7, further comprising a second pigment. ### Claim 11 (depends on 10) The toner particle of claim 10, wherein said second pigment is a cyan pigment. ### Claim 12 (depends on 7) The toner particle of claim 7, wherein said toner particle comprises a core and a shell thereon. ### Claim 13 (depends on 12) The toner particle of claim 12, wherein said shell comprises a surface-treated pigment particle comprising a rosin compound. ### Claim 14 (depends on 7) The toner particle of claim 7, comprising from about 2 to about 35 wt % pigment. ### Claim 15 (depends on 7) The toner particle of claim 7, comprising an emulsion/aggregation toner. ### Claim 16 (depends on 7) The toner particle of claim 7, comprising a low melt toner. ### Claim 17 (depends on 1) A method of making a toner particle comprising: a) mixing a composition comprising an amorphous emulsion, an optional crystalline emulsion, an optional wax, the surface-treated pigment particle of claim 1 and an optional second pigment to form an emulsion comprising particles; and b) aggregating said particles; and optionally c) forming a shell on said aggregated particles to yield said toner particle. ### Claim 18 (depends on 17) The method of claim 17, wherein said surface-treated pigment particle comprises a black pigment. ### Claim 19 (depends on 1) A method for preparing the surface-treated pigment particle of claim 1 comprising: (a) dissolving a rosin compound in a water miscible organic solvent to form a solution; (b) contacting said solution with an aqueous solution of a pigment particle dispersion to form a mixture; and (c) evaporating said organic solvent from said mixture to yield said surface-treated pigment particle. ### Claim 20 (depends on 19) The method of claim 19, wherein said water miscible organic solvent is acetone, tetrahydrofuran, 2-methyltetrahydrofuran, a ketone or an alcohol.