# US 2020/0401062 A1 · Electrophotographic composition > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2020/0401062 A1 - Document ID: US20200401062A1 - Status: Published application - Kind: A1 - Application number: 16/957,279 - Filed: 2018-04-11 - Published: 2020-12-24 - Earliest claimed: 2018-04-11 - Assignees: Hewlett-Packard Development Company, L.P. - Applicants: Hewlett-Packard Development Company, L.P. - Inventors: Hanit Marom Tchaicheeyan; Albert Teishev - Web page: https://patentgrep.com/patent/US20200401062A1 ## CPC - G03G 9/1355: {Ionic, organic compounds} - C09D 11/033: characterised by the solvent - C09D 11/08: based on natural resins - C09D 11/106: containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds - C09D 11/107: from unsaturated acids or derivatives thereof - G03G 9/131: {obtained by reactions only involving carbon-to-carbon unsaturated bonds} - G03G 15/1605: {using at least one intermediate support (G03G15/1625 takes precedence)} - G03G 15/10: using a liquid developer - G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY - 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) ## Abstract This disclosure relates to an electrophotographic composition including a thermoplastic polymer, a charge adjuvant, a liquid carrier, and at least one microcapsule including at least one additive encapsulated within a shell, wherein the shell of the microcapsule includes a material having a melting temperature of at least 50 degrees C. ## Claims ### Claim 1 An electrophotographic composition comprising: a thermoplastic polymer, a charge adjuvant, a liquid carrier, and at least one microcapsule comprising at least one additive encapsulated within a shell, wherein the shell of the microcapsule comprises a material having a melting temperature of at least 50 degrees C. ### Claim 2 (depends on 1) The electrophotographic composition according to claim 1, wherein the thermoplastic polymer is selected from at least one of a copolymer of an olefin and acrylic acid, and a copolymer of an olefin and methacrylic acid. ### Claim 3 (depends on 1) The electrophotographic composition according to claim 1, wherein the additive is a liquid or solid. ### Claim 4 (depends on 3) The electrophotographic composition according to claim 3, wherein the liquid comprises a solid printing agent dissolved or dispersed in a polar solvent. ### Claim 5 (depends on 4) The electrophotographic composition according to claim 4, wherein the solid printing agent comprises a primer. ### Claim 6 (depends on 1) The electrophotographic composition according to claim 1, wherein the diameter of the microcapsule is from 1 to 2 microns. ### Claim 7 (depends on 1) The electrophotographic composition according to claim 1, wherein the shell of the microcapsule is transparent. ### Claim 8 (depends on 1) The electrophotographic composition according to claim 1, which further comprises a charge director. ### Claim 9 (depends on 1) The electrophotographic composition according to claim 1, wherein the shell of the microcapsule comprises a material having a melting temperature of 50 to 90 degrees C. ### Claim 10 (depends on 1) The electrophotographic composition according to claim 1, wherein the microcapsules are present in an amount of from 10 to 100% by weight of solids in the composition. ### Claim 11 (depends on 1) The electrophotographic composition according to claim 1, wherein the shell of the microcapsules comprises a material selected from one or more of xanthan gum, arabic gum, fatty alcohols, fatty acids, hydrocarbon resins, mono, di and triacyl glycol, natural waxes, polyethylene, alginate, carrageenan, caseinate, chitosan, modified cellulose, gelatin, latex, starch, ethyl cellulose and polyethylene. ### Claim 12 An electrophotographic printing method comprising: contacting an intermediate transfer blanket with a print substrate, wherein the intermediate transfer blanket bears an image formed from at least one electrophotographic composition comprising a thermoplastic polymer, a charge adjuvant and at least one microcapsule comprising at least one additive encapsulated within a shell; transferring the image from the intermediate transfer blanket to the print substrate, and releasing the additive on the print substrate. ### Claim 13 (depends on 12) A method according to claim 12, wherein the intermediate transfer blanket bearing the image is formed by selectively charging a photoconductive surface to form a latent electrostatic image on the photoconductive surface, electrostatically transferring electrophotographic composition to the photoconductive surface to form an image on the photoconductive surface that corresponds to the latent electrostatic image; contacting the photoconductive surface with an intermediate transfer blanket to transfer the image onto the intermediate transfer blanket. ### Claim 14 (depends on 12) A method according to claim 12, which the image on the intermediate transfer blanket is heated to facilitate transfer of the image from the intermediate transfer blanket to the print substrate and to melt at least a portion of the shell of the microcapsule to release the additive on the print substrate. ### Claim 15 (depends on 14) A method according to claim 14, wherein the image on the intermediate transfer blanket is heated to a temperature of at least 50 degrees C.