# US 12,600,840 B2 · Cellulose acetate resin composition > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,600,840 B2 - Document ID: US12600840B2 - Status: Granted - Kind: B2 - Application number: 18/628,853 - Filed: 2024-04-08 - Published: 2024-07-25 - Granted: 2026-04-14 - Earliest claimed: 2020-08-07 - Assignees: Daicel Corporation - Applicants: Daicel Corporation - Inventors: Masaaki Kusumoto; Takafumi Kawasaki; Akihiro Higuchi - Web page: https://patentgrep.com/patent/US12600840B2 ## CPC - C08L 1/12: Cellulose acetate - C08J 3/18: Plasticising macromolecular compounds (plasticisers C08K) - C08J 5/18: Manufacture of films or sheets - C08K 3/22: of metals - C08K 3/26: Carbonates; Bicarbonates - C08K 3/34: Silicon-containing compounds - C08K 3/346: {Clay} - C08K 5/103: with polyalcohols - C08K 5/11: of acyclic polycarboxylic acids - C08K 5/22: Compounds containing nitrogen bound to another nitrogen atom - C09D 101/02: Cellulose; Modified cellulose - C08J 2301/12: Cellulose acetate - C08K 5/06: Ethers; Acetals; Ketals; Ortho-esters - C08K 5/101: of monocarboxylic acids - C08K 2003/222: {Magnesia, i.e. magnesium oxide} - C08K 2003/265: {Calcium, strontium or barium carbonate} - Y02W 10/10: Biological treatment of water, waste water, or sewage - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29) - 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) - Y02W: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT ## Abstract A cellulose acetate resin composition may include a cellulose acetate (A) having a total degree of acetyl substitution of 2.60 or less; a filler (B); and a plasticizer (C). The filler (B) may be selected from the group consisting of (b1) a predetermined inorganic compound, (b2) a predetermined metal salt, (b3) cellulose or hemicellulose, and (b4) wood flour. The plasticizer (C) may be selected from (c1) a glycerin ester-based plasticizer, (c2) an ether-based plasticizer, and (c3) a glycol ester-based plasticizer. A content of the component (A) may be from 45 to 90 mass %. A total content of the component (B) may be from 5 to 50 mass %. A total content of the component (C) may be from 5 to 35 mass %. ## Claims ### Claim 1 A cellulose acetate resin composition comprising: a cellulose acetate (A) having a total degree of acetyl substitution of 2.1 or greater and 2.60 or less; a filler (B); and a plasticizer (C), wherein a content of the cellulose acetate (A) is 45 mass % or greater and 90 mass % or less, a total content of the filler (B) is 5 mass % or greater and 50 mass % or less, and a total content of the plasticizer (C) is 7 mass % or greater and 35 mass % or less, with respect to a total of the resin composition, and a degree of acetyl substitution at 2-position C2, a degree of acetyl substitution at 3-position C3, and a degree of acetyl substitution at 6-position C6 of the cellulose acetate satisfy the following condition: (C2+C3)/2>C6. ### Claim 2 (depends on 1) The resin composition according to claim 1, wherein the filler (B) is one type or two or more types selected from the group consisting of: (b1) an inorganic compound containing an oxygen atom that binds to any metal element of Na, K, Ca, or Mg; (b2) a metal salt containing one or more types of metal ions selected from Na+, K+, Ca2+, or Mg2+ and one or more types of anions selected from a carbonate ion, a bicarbonate ion, a silicate ion, or an aluminate ion, (b3) cellulose or hemicellulose, and (b4) wood flour. ### Claim 3 (depends on 1) The resin composition according to claim 1, wherein the plasticizer (C) is one type or two or more types selected from the group consisting of: (c1) a glycerin ester in which at least one hydroxyl group of glycerin is esterified, (c2) an ether in which at least one terminal hydroxyl group of polyalkylene glycol is etherified, and (c3) a glycol ester in which at least one terminal hydroxyl group of polyalkylene glycol is esterified. ### Claim 4 (depends on 1) The resin composition according to claim 1, wherein a total content of the cellulose acetate (A), the filler (B), and the plasticizer (C) in the resin composition is 85 mass % or greater. ### Claim 5 (depends on 4) The resin composition according to claim 4, wherein the total content of the cellulose acetate (A), the filler (B), and the plasticizer (C) in the resin composition is 95 mass % or greater. ### Claim 6 (depends on 3) The resin composition according to claim 3, wherein the glycerin ester (c1) is a glycerin acetate having a degree of acetyl substitution of 0 or greater and 3 or less. ### Claim 7 (depends on 3) The resin composition according to claim 3, wherein the glycerin ester (c1) is a compound esterified with a carboxylic acid having a molecular weight of 150 or less. ### Claim 8 (depends on 3) The resin composition according to claim 3, wherein the ether (c2) is a polyalkylene glycol in which an average degree of substitution of the terminal hydroxyl group etherified with a hydrocarbon group having a molecular weight of 150 or less is 0 or greater and 2 or less, and the polyalkylene glycol has an alkyleneoxy group having 2 or greater and 4 or less carbon atoms as a repeating unit, and has a degree of polymerization of 23 or less. ### Claim 9 (depends on 8) The resin composition according to claim 8, wherein the hydrocarbon group is a saturated aliphatic hydrocarbon group. ### Claim 10 (depends on 3) The resin composition according to claim 3, wherein the glycol ester (c3) is a polyalkylene glycol in which an average degree of substitution of the terminal hydroxyl group esterified with a carboxylic acid having a molecular weight of 150 or less is 0 or greater and 2 or less, and the polyalkylene glycol has an alkyleneoxy group having 2 or greater and 4 or less carbon atoms as a repeating unit, and has a degree of polymerization of 23 or less. ### Claim 11 (depends on 10) The resin composition according to claim 10, wherein the glycol ester (c3) has a number average molecular weight of 200 or greater and 1000 or less. ### Claim 12 (depends on 10) The resin composition according to claim 10, wherein the carboxylic acid is a saturated fatty acid. ### Claim 13 (depends on 3) The resin composition according to claim 3, wherein the plasticizer (C) is one type or two or more types selected from the group consisting of: (c2) the ether in which at least one terminal hydroxyl group of polyalkylene glycol is etherified, and (c3) the glycol ester in which at least one terminal hydroxyl group of polyalkylene glycol is esterified. ### Claim 14 (depends on 1) The resin composition according to claim 1, wherein the total content of the plasticizer (C) is 9 mass % or greater and 33 mass % or less with respect to the total of the resin composition. ### Claim 15 (depends on 2) The resin composition according to claim 2, wherein the filler (B) is one type or two or more types selected from the group consisting of: (b1) the inorganic compound containing an oxygen atom that binds to any metal element of Na, K, Ca, or Mg; and (b2) the metal salt containing one or more types of metal ions selected from Na+, K+, Ca2+, or Mg2+ and one or more types of anions selected from a carbonate ion, a bicarbonate ion, a silicate ion, or an aluminate ion. ### Claim 16 (depends on 1) The resin composition according to claim 1, wherein the total content of the filler (B) is 15 mass % or greater and 40 mass % or less with respect to the total of the resin composition. ### Claim 17 (depends on 1) The resin composition according to claim 1, wherein a sulfuric acid component amount of the cellulose acetate (A) is 350 ppm or less. ### Claim 18 (depends on 1) The resin composition according to claim 1, wherein the content of the cellulose acetate (A) is 50 mass % or greater and 80 mass % or less. ### Claim 19 (depends on 1) The resin composition according to claim 1, wherein the cellulose acetate (A) has the total degree of acetyl substitution of 2.1 or greater and 2.50 or less. ### Claim 20 (depends on 1) The resin composition according to claim 1, further comprising triethylene glycol diacetate or triacetin.