# US 5,707,433 A · Pigment inks for ink jet printers > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,707,433 A - Document ID: US5707433A - Status: Granted - Kind: A - Application number: 08/745,267 - Filed: 1996-11-08 - Granted: 1998-01-13 - Earliest claimed: 1996-11-08 - Assignees: Fuji Pigment Co., Ltd. - Inventors: Ishio Kuge; Shiro Mori; Estuo Ikemoto - Web page: https://patentgrep.com/patent/US5707433A ## CPC - C09D 11/326: characterised by the pigment dispersant - 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 A pigmented ink for ink jet printer which comprises pigment particle as a colorant, water or a mixture of water and at least one hydrophilic organic solvent as a carrier medium and a derivative of polyoxyethylene ether sulphate or a derivative of polyoxyethylene ether phosphate as a dispersant. These inks give images having good print quality and excellent storage stability after many thermal cycles of -20.degree. C. to 80.degree. C. ## Claims ### Claim 1 A pigmented ink composition consisting of: 30 parts by weight of carbon black; 10 parts by weight of polyoxyethylene laurylether phosphate; 28parts by weight of ethylene glycol; 2 parts by weight of preservative; 50 parts by weight of glycerol; 150 parts by weight of diethyleneglycol; 2 parts by weight of 48% NaOH solution; and 728 parts by weight of deionized water. ### Claim 2 A pigmented ink composition consisting of: 30 parts by weight of carbon black; 10 parts by weight of polyoxyethylene nonylphenylether phosphate; 30 parts by weight of ethylene glycol; 2 parts by weight of ammonia water; 2 parts by weight of preservative; 200 parts by weight of glycerol; 50 parts by weight of propylene glycol; and 676 parts by weight of deionized water. ### Claim 3 A pigmented ink composition consisting of: 40 parts by weight of C.I. Pigment Yellow 17; 10 parts by weight of polyoxyethylene laurylether phosphate monoethanol amine; 40 parts by weight of ethylene glycol; 2 parts by weight of preservative; 200 parts by weight of diethylene glycol; and 703 parts by weight of deionized water. ### Claim 4 A pigmented ink composition consisting of: 30 parts by weight of C.I. Pigment Red 122; 15 parts by weight of dipolyoxyethylene nonylphenyl ether phosphate; 30 parts by weight of ethylene glycol; 2 parts by weight of preservative; 1 part by weight of 48% NaOH solution; 200 parts by weight of glycerol; 2 parts by weight of ammonia; and 720 parts by weight of deionized water. ### Claim 5 A pigmented ink composition consisting of: 40 parts by weight of carbon black; 10 parts by weight of polyoxyethylene laurylether sulphate; 28 parts by weight of ethylene glycol; 2 parts by weight of preservative; 50 parts by weight of glycerol; 150 parts by weight of diethylene glycol; 1 part by weight of 48% NaOH solution; and 699 parts by weight of deionized water. ### Claim 6 A pigmented ink composition consisting of: 30 parts by weight of carbon black; 10 parts by weight of polyoxyethylene oleylether ammonium sulphate; 30 parts by weight of ethylene glycol; 2 parts by weight of preservative; 200 parts by weight of glycerol; 50 parts by weight of propylene glycol; 1 part by weight of ammonia water; and 676 parts by weight of deionized water. ### Claim 7 A pigmented ink composition consisting of: 30 parts by weight of C.I. Pigment Red 122; 15 parts by weight of polyoxyethylene nonylphenylether ammonium sulphate; 30 parts by weight of ethylene glycol; 2 parts by weight of preservative; 200 parts by weight of glycerol; 2 parts by weight of ammonia water; and 721 parts by weight of deionized water. ### Claim 8 A pigmented ink composition consisting of: 20 parts by weight of C.I. Pigment Blue 15; 15 parts by weight of polyoxyethylene alkylether triethanolammonium sulphate; 20parts by weight of ethylene glycol; 2 parts by weight of preservative; 200 parts by weight of diethylene glycol; 10 parts by weight of ethyleneglycol dimethylether; 5 parts by weight of triethanol amine; and 733 parts by weight of deionized water.