# US 11,442,373 B2 · Liquid electrostatic ink composition > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,442,373 B2 - Document ID: US11442373B2 - Status: Granted - Kind: B2 - Application number: 16/603,715 - Filed: 2017-07-10 - Published: 2021-03-25 - Granted: 2022-09-13 - Earliest claimed: 2017-07-10 - Assignees: HP Indigo B.V. - Applicants: HP Indigo B.V. - Inventors: Hanit Marom Tchaicheeyan; Albert Teishev; Igor Shutyi; Yael Kowal-Blau; Matan Schneider - Web page: https://patentgrep.com/patent/US11442373B2 ## CPC - C09D 11/106: containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds - G03G 9/131: {obtained by reactions only involving carbon-to-carbon unsaturated bonds} - C09D 11/02: Printing inks (C09D11/30 takes precedence) - C09D 11/03: characterised by features other than the chemical nature of the binder - C09D 11/107: from unsaturated acids or derivatives thereof - 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) - G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY ## Abstract An electrostatic ink composition comprising a carrier liquid; a first resin comprising a copolymer of an alkylene monomer and a methacrylic acid monomer; and a second resin comprising a copolymer of an alkylene monomer and an acrylic acid monomer, wherein the second resin constitutes at least 35 wt. % of the total amount of resin is disclosed. ## Claims ### Claim 1 An electrostatic ink composition comprising: a carrier liquid; a first resin comprising a copolymer of an alkylene monomer and a methacrylic acid monomer, wherein the first resin constitutes from 40 wt. % to 65 wt. % of a total amount of resin; a second resin comprising a copolymer of an alkylene monomer and an acrylic acid monomer, wherein the second resin constitutes from at least 35 wt. % to 60 wt. % of the total amount of resin; and a third resin comprising a copolymer of an alkylene monomer and a vinyl ester monomer, wherein the third resin constitutes from 0.5 wt. % to 9.5 wt. % of the total amount of resin; wherein the first resin and the second resin and the third resin are present in a ratio (wt./wt./wt.) of 45:50:5. ### Claim 2 (depends on 1) The electrostatic ink composition according to claim 1, wherein the vinyl ester monomer is vinyl acetate. ### Claim 3 (depends on 1) The electrostatic ink composition according to claim 1, wherein the second resin constitutes at least 40 wt. % to 60 wt. % of the total amount of resin. ### Claim 4 (depends on 1) The electrostatic ink composition according to claim 1, wherein the methacrylic acid monomer constitutes 10 wt. % or more of the monomers of the first resin. ### Claim 5 (depends on 1) The electrostatic ink composition according to claim 1, wherein the methacrylic acid monomer constitutes 14 wt. % or more of the monomers of the first resin. ### Claim 6 (depends on 1) The electrostatic ink composition according to claim 1, wherein the alkylene monomer of the first resin is selected from ethylene or propylene. ### Claim 7 (depends on 1) The electrostatic ink composition according to claim 1, wherein the alkylene monomer of the second resin is selected from ethylene or propylene. ### Claim 8 (depends on 1) The electrostatic ink composition according to claim 1, wherein the acrylic acid monomer constitutes 13 wt. % or more of the second resin. ### Claim 9 (depends on 1) The electrostatic ink composition according to claim 1, wherein the first resin has a melt flow rate (190° C/2.16 kg) of 50 g/10 min or less determined by using ASTM D1238 or ISO 1133. ### Claim 10 (depends on 1) The electrostatic ink composition according to claim 1, wherein the alkylene monomer of the third resin is selected from ethylene or propylene. ### Claim 11 (depends on 1) The electrostatic ink composition according to claim 1, wherein the second resin has a melt viscosity of 15000 poise or less. ### Claim 12 A method of producing an electrostatic ink composition, the method comprising combining: a carrier liquid; a first resin comprising a copolymer of an alkylene monomer and a methacrylic acid monomer, wherein the first resin constitutes from 40 wt. % to 65 wt. % of a total amount of resin; a second resin comprising a copolymer of an alkylene monomer and an acrylic acid monomer, wherein the second resin constitutes from at least 35 wt. % to 60 wt. % of the total amount of resin; and a third resin comprising a copolymer of an alkylene monomer and a vinyl ester monomer, wherein the third resin constitutes from 0.5 wt. % to 9.5 wt. % of the total amount of resin; wherein the first resin and the second resin and the third resin are present in a ratio (wt./wt./wt.) of 45:50:5. ### Claim 13 A printed substrate, the printed substrate comprising: a plastic film; and an electrostatically printed ink disposed on the plastic film; wherein the electrostatically printed ink composition comprises: a first resin comprising a copolymer of an alkylene monomer and a methacrylic acid monomer, wherein the first resin constitutes from 40 wt. % to 65 wt. % of a total amount of resin; a second resin comprising a copolymer of an alkylene monomer and an acrylic acid monomer, wherein the second resin constitutes from at least 35 wt. % to 60 wt. % of the total amount of resin: and a third resin comprising a copolymer of an alkylene monomer and a vinyl ester monomer, wherein the third resin constitutes from 0.5 wt. % to 9.5 wt. % of the total amount of resin; wherein the first resin and the second resin and the third resin are present in a ratio (wt./wt./wt.) of 45:50:5.