# US 2020/0399402 A1 · Cellulose resin, molding material, molded body, and method for producing cellulose resin > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2020/0399402 A1 - Document ID: US20200399402A1 - Status: Published application - Kind: A1 - Application number: 16/976,814 - Filed: 2019-02-14 - Published: 2020-12-24 - Earliest claimed: 2018-03-01 - Assignees: NEC Corporation - Applicants: NEC Corporation - Inventors: Shukichi TANAKA - Web page: https://patentgrep.com/patent/US20200399402A1 ## CPC - C08B 3/16: Preparation of mixed organic cellulose esters {, e.g. cellulose aceto-formate or cellulose aceto-propionate} - C08L 1/14: Mixed esters, e.g. cellulose acetate-butyrate - C08B: POLYSACCHARIDES; DERIVATIVES THEREOF (polysaccharides containing less than six saccharide radicals attached to each other by glycosidic linkages C07H; fermentation or enzyme-using processes C12P19/00; sugar industry C13; production of cellulose D21) - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) ## Abstract A cellulose resin in which hydrogen atoms of hydroxy groups of cellulose are substituted with a long-chain component which is a linear aliphatic acyl group having 14 or more carbon atoms and a short-chain component which is at least one of an acyl group having 2 carbon atoms and an acyl group having 3 carbon atoms, wherein a nitrogen content in the cellulose resin is 300 ppm or more and 2000 ppm or less. To provide a cellulose resin excellent in mechanical properties and heat decomposition resistance. ## Claims ### Claim 1 A cellulose resin in which hydrogen atoms of hydroxy groups of cellulose are substituted with a long-chain component which is a linear aliphatic acyl group having 14 or more carbon atoms and a short-chain component which is at least one of an acyl group having 2 carbon atoms and an acyl group having 3 carbon atoms, wherein a nitrogen content in the cellulose resin is 300 ppm or more and 2000 ppm or less. ### Claim 2 (depends on 1) The cellulose resin according to claim 1, wherein the cellulose resin has a basic nitrogen-containing group. ### Claim 3 (depends on 2) The cellulose resin according to claim 2, wherein the basic nitrogen-containing group is a pyridine ring-containing group. ### Claim 4 (depends on 1) The cellulose resin according to claim 1, wherein, in a GPC chromatogram (elution curve) of the cellulose resin, measured by gel permeation chromatography (GPC), the GPC chromatogram has a sub-peak or a reading in a region having a molecular weight of 9 million or more, and a content ratio (area ratio) of a high molecular weight component corresponding to the region is in a range of 2 to 10%. ### Claim 5 (depends on 1) The cellulosic resin according to claim 1, wherein a degree of substitution DSLo with the long-chain component is in the range of 0.2 to 0.6, and the degree of substitution DSSh with the short-chain component is in the range of 1.7 to 2.8. ### Claim 6 (depends on 5) The cellulosic resin according to claim 5, wherein a sum of the degree of substitution DSLo and the degree of substitution DSSh is 2.1 or more. ### Claim 7 (depends on 1) The cellulose resin according to claim 1, wherein the long-chain component is an acyl group portion of at least one fatty acid selected from myristic acid, palmitic acid, stearic acid, arachidic acid, and behenic acid. ### Claim 8 (depends on 1) A molding material comprising a cellulose resin according to claim 1. ### Claim 9 (depends on 8) A molded body formed using the molding material according to claim 8. ### Claim 10 (depends on 1) A method for producing a cellulose resin, the cellulose resin being according to claim 1, comprising: reacting a pulp dispersed in an organic solvent with a short chain acylating agent for introducing an acyl group having 2 to 3 carbon atoms and a long-chain acylating agent for introducing an acyl group having 14 or more carbon atoms, in the presence of a basic nitrogen-containing organic compound under heating at 100° C. or below, to acylate hydroxy groups of a cellulose constituting the pulp; and separating an acylated cellulose obtained by the acylation from the organic solvent. ### Claim 11 (depends on 10) The method for producing a cellulose resin according to claim 10, wherein the basic nitrogen-containing organic compound is pyridine. ### Claim 12 (depends on 10) The method for producing a cellulose resin according to claim 10, wherein the organic solvent is N-methylpyrrolidone. ### Claim 13 (depends on 10) The method for producing a cellulose resin according to claim 10, wherein a mixing ratio (mass ratio R/S) of the basic nitrogen-containing organic compound (R) and the organic solvent (S) is in a range of 5/95 to 30/70. ### Claim 14 (depends on 10) The method for producing a cellulose resin according to claim 10, wherein a reaction temperature of the acylation is in a range of 70 to 100° C. ### Claim 15 (depends on 10) The method for producing a cellulose resin according to claim 10, wherein a total amount of the organic solvent and the basic nitrogen-containing organic compound is 10 to 50 times the dry mass of the pulp. ### Claim 16 (depends on 10) The method for producing a cellulose resin according to claim 10, wherein the short chain reagent is at least one selected from acetyl chloride, acetic anhydride, propionic anhydride and propionyl chloride, and the long-chain reactive agent is an acid chloride of a linear fatty acid having 14 or more carbon atoms.