# US 5,350,789 A · Hot-melt ink composition > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,350,789 A - Document ID: US5350789A - Status: Granted - Kind: A - Application number: 08/007,783 - Filed: 1993-01-22 - Granted: 1994-09-27 - Earliest claimed: 1992-01-23 - Assignees: Hitachi Koki Co., Ltd.; Hitachi, Ltd. - Inventors: Akemi Sagawa; Ren Itoh; Masahiko Sakai; Riyuuichi Shimizu - Web page: https://patentgrep.com/patent/US5350789A ## CPC - C08K 5/103: with polyalcohols - C08K 5/20: Carboxylic acid amides - C09D 11/34: Hot-melt inks - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) - 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 hot-melt ink composition for an ink jet printer comprising from 10 to 65% by weight of a polyamide resin, from 5 to 60% by weight of a fatty acid amide, from 5 to 40% by weight of a glyceride, and up to 5% by weight of a colorant. The composition is excellent in transparency to provide a highly transparent ink image on an OHP sheet. ## Claims ### Claim 1 A hot-melt ink composition which is solid at room temperature and is liquefied by heating, comprising from 10 to 65% by weight of a polyamide resin, and from 5 to 40% by weight of a glyceride. ### Claim 2 (depends on 1) A hot-melt ink composition as claimed in claim 1, wherein said polyamide resin is present in an amount of from 10 to 20% by weight. ### Claim 3 (depends on 2) A hot-melt ink composition as claimed in claim 2, wherein said polyamide resin is present in an amount of 10% by weight. ### Claim 4 (depends on 1) A hot-melt ink composition as claimed in claim 1, further comprising a fatty acid amide, said fatty acid amide being present in said composition in an amount of from 5 to 60% by weight. ### Claim 5 (depends on 4) A hot-melt ink composition as claimed in claim 4, wherein said fatty acid amide is present in an amount of from 40 to 60% by weight. ### Claim 6 (depends on 5) A hot-melt ink composition as claimed in claim 5, wherein said fatty acid amide is present in an amount of 50% by weight. ### Claim 7 (depends on 1) A hot-melt ink composition as claimed in claim 1, wherein said glyceride is present in an amount of from 10 to 40% by weight ### Claim 8 (depends on 7) A hot-melt ink composition as claimed in claim 7, wherein said glyceride is present in an amount of 10% by weight. ### Claim 9 (depends on 1) A hot-melt ink composition as claimed in claim 1, further comprising a colorant. ### Claim 10 (depends on 9) A hot-melt ink composition as claimed in claim 9, wherein said colorant is present in an amount of from 0.5 to 5% by weight. ### Claim 11 (depends on 9) A hot-melt ink composition as claimed in claim 9, wherein said colorant has a magenta color, a cyan color, a yellow color, or a black color. ### Claim 12 (depends on 1) A hot-melt ink composition as claimed in claim 1, wherein said ink composition is for an ink jet printer. ### Claim 13 (depends on 4) A hot-melt ink composition as claimed in claim 4, wherein said fatty acid amide is selected from the group consisting of an N-unsubstituted fatty acid amide, an N-substituted fatty acid amide and mixtures thereof. ### Claim 14 (depends on 13) A hot-melt ink composition as claimed in claim 13, wherein said N-unsubstituted fatty acid amide is selected from the group consisting of lauramide, stearamide, oleamide, erucamide, ricinoleic acid amide, 1,2-hydroxystearamide, palmitamide, behenamide, brassidamide and mixtures thereof. ### Claim 15 (depends on 13) A hot-melt ink composition as claimed in claim 13, wherein said N-substituted fatty acid amide is selected from the group consisting of N,N'-ethylene-bisoleic acid amide, N,N'-xylenebisstearic acid amide, stearic acid monomethylolamide, N-oleylstearic acid amide, N-stearylstearic acid amide, N-oleylpalmitic acid amide, N-stearylerucic acid amide, N,N'-dioleyladipic acid amide, N,N'-dioleylsebacic acid amide, N,N'-distearylisophthalic acid amide and mixtures thereof. ### Claim 16 (depends on 1) A hot-melt ink composition as claimed in claim 1, wherein said glyceride is selected from the group consisting of triglyceride, hardened castor oil, partially hydrogenated castor oil, hardened soybean oil, hardened rape seed oil, hardened vegetable oil and mixtures thereof. ### Claim 17 A hot-melt ink composition which is solid at room temperature and is liquefied by heating, comprising from 10 to 65% by weight of a polyamide resin, from 5 to 40% by weight of a glyceride, and a colorant in an amount up to 5% by weight. ### Claim 18 (depends on 17) A hot-melt ink composition as claimed in claim 17, wherein said polyamide resin is present in an amount of from 10 to 20% by weight. ### Claim 19 (depends on 18) A hot-melt ink composition as claimed in claim 18, wherein said polyamide resin is present in an amount of 10% by weight. ### Claim 20 (depends on 17) A hot-melt ink composition as claimed in claim 17, further comprising a fatty acid amide, said fatty acid amide being present in said composition in an amount of from 5 to 60% by weight. ### Claim 21 (depends on 20) A hot-melt ink composition as claimed in claim 20, wherein said fatty acid amide is present in an amount of from 40 to 60% by weight. ### Claim 22 (depends on 21) A hot-melt ink composition as claimed in claim 21, wherein said fatty acid amide is present in an amount of 50% by weight. ### Claim 23 (depends on 17) A hot-melt ink composition as claimed in claim 17, wherein said glyceride is present in an amount of from 10 to 40% by weight. ### Claim 24 (depends on 23) A hot-melt ink composition as claimed in claim 23, wherein said glyceride is present in an amount of 10% by weight. ### Claim 25 (depends on 17) A hot-melt ink composition as claimed in claim 17, wherein said colorant has a magenta color, a cyan color, a yellow color, or a black color. ### Claim 26 (depends on 17) A hot-melt ink composition as claimed in claim 17, wherein said ink composition is for an ink jet printer. ### Claim 27 A hot-melt ink composition comprising from 25 to 65% by weight of a polyamide resin, from 10 to 60% by weight of a fatty acid amide, up to 40% by weight of a fatty acid and from 0.5 to 5% by weight of a colorant. ### Claim 28 A hot-melt ink composition comprising from 10 to 50% by weight of a polyamide resin, from 20 to 60% by weight of a fatty acid amide, from 10 to 40% by weight of a glyceride, and from 0.5 to 5% by weight of a colorant. ### Claim 29 A hot-melt ink composition which is solid at room temperature and is liquefied by heating, comprising from 10 to 20% by weight of a polyamide resin, from 40 to 60% by weight of a saturated fatty acid amide and from 10 to 20% by weight of a glyceride.