# US 2020/0399464 A1 · Blends of polyesters and polysaccharides > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2020/0399464 A1 - Document ID: US20200399464A1 - Status: Published application - Kind: A1 - Application number: 16/971,444 - Filed: 2019-02-07 - Published: 2020-12-24 - Earliest claimed: 2018-02-26 - Assignees: Dupont Industrial Biosciences USA, LLC - Applicants: DuPont Industrial Biosciences USA, LLC - Inventors: Ross S. Johnson; Vindhya Mishra - Web page: https://patentgrep.com/patent/US20200399464A1 ## CPC - C08L 67/00: Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain (of polyester-amides C08L77/12; of polyester-imides C08L79/08); Compositions of derivatives of such polymers - C08L 67/03: the dicarboxylic acids and dihydroxy compounds having the carboxyl- and the hydroxy groups directly linked to aromatic rings - C08L 5/00: Compositions of polysaccharides or of their derivatives not provided for in groups C08L1/00 or C08L3/00 - C08L 2205/03: containing three or more polymers in a blend - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) ## Abstract A polyester composition comprising at least one polyester selected from the group consisting of poly(trimethylene terephthalate), polyethylene terephthalate, polybutylene terephthalate, and copolymers thereof; and at least one poly alpha-1,3-glucan ester having a degree of substitution of from about 0.3 to 3 moles of at least one acyl group per repeat unit of poly alpha-1,3-glucan. Articles prepared from these polyester compositions exhibit at least one improved physical property such as heat deflection temperature, tensile strength, Young's modulus, or impact strength. Such polyester compositions may also be prepared from renewable resources. ## Claims ### Claim 1 A polyester composition comprising: C) from about 10 to about 95 weight percent of at least one polyester selected from the group consisting of poly(trimethylene terephthalate), polyethylene terephthalate, polybutylene terephthalate, and copolymers thereof; and D) from about 5 to about 90 weight percent of at least one poly alpha-1,3-glucan ester having a degree of substitution of from about 0.3 to 3 moles of at least one acyl group per repeat unit of poly alpha-1,3-glucan. ### Claim 2 (depends on 1) The polyester composition of claim 1 wherein the poly alpha-1,3-glucan ester has a degree of substitution of from about 0.5 to about 2.8 moles of at least one acyl group per repeat unit of poly alpha-1,3-glucan. ### Claim 3 (depends on 1) The polyester composition of claim 1 wherein the poly alpha-1,3-glucan ester has a degree of substitution of from about 1.0 to about 2.8 moles of at least one acyl group per repeat unit of poly alpha-1,3-glucan. ### Claim 4 (depends on 1) The polyester composition of claim 1 wherein the poly alpha-1,3-glucan ester comprises at least one acyl group selected from the group consisting of acetyl; benzoyl, enanthyl, caprylyl, pelargonyl, capryl, undecanoyl, lauroyl, tridecanoyl, myristyl, pentadecanoyl, palmitoyl, heptadecanoyl, stearyl, nonadecanoyl, arachidyl, uneicosanoyl, behenyl, trieicosanoyl, lignoceryl, pentaleicosanoyl, cerotyl, and combination of these. ### Claim 5 (depends on 4) The polyester composition of claim 4 wherein the at least one acyl group is selected from the group consisting of acetyl, capryl, lauroyl, myristyl, palmitoyl, stearyl, and combinations of these. ### Claim 6 (depends on 1) An article comprising the polyester composition of claim 1. ### Claim 7 (depends on 6) The article of claim 6 in the form of automotive interior part, consumer electronics, toys, household appliances. ### Claim 8 (depends on 1) The polyester composition of claim 1 wherein the poly alpha-1,3-glucan ester comprises from 0.05 to 0.3 moles of at least one acyl group selected from enanthyl, caprylyl, pelargonyl, capryl, undecanoyl, lauroyl, tridecanoyl, myristyl, pentadecanoyl, palmitoyl, heptadecanoyl, stearyl, nonadecanoyl, arachidyl, uneicosanoyl, behenyl, trieicosanoyl, lignoceryl, pentaleicosanoyl, cerotyl, and from 2.95 to 2.3 moles of acetyl groups. ### Claim 9 A polyester composition comprising: A) from about 10 to about 75 weight percent of at least one polyester selected from the group consisting of poly(trimethylene terephthalate), polyethylene terephthalate, polybutylene terephthalate, and copolymers thereof; and B) from about 25 to about 90 weight percent of at least one poly alpha-1,3-glucan ester having a degree of substitution of from about 0.3 to 3 moles of at least two acyl groups per repeat unit of poly alpha-1,3-glucan; wherein said at least one poly alpha-1,3-glucan ester comprises from 0.05 to 0.2 moles of at least one acyl group selected from enanthyl, caprylyl, pelargonyl, capryl, undecanoyl, lauroyl, tridecanoyl, myristyl, pentadecanoyl, palmitoyl, heptadecanoyl, stearyl, nonadecanoyl, arachidyl, uneicosanoyl, behenyl, trieicosanoyl, lignoceryl, pentaleicosanoyl, cerotyl, and from 2.7 to 2.3 moles of acetyl groups; and wherein said polyester composition exhibits an impact strength when measured according to ASTM 256-10 which is at least 10 percent greater than polyester A. ### Claim 10 A polyester composition comprising: C) from about 10 to about 85 weight percent of poly(trimethylene terephthalate); and D) from about 15 to about 90 weight percent of at least one poly alpha-1,3-glucan ester having a degree of substitution of from about 2.3 to 2.9 moles of at least two acyl groups per repeat unit of poly alpha-1,3-glucan; wherein said at least one poly alpha-1,3-glucan ester comprises from 0.05 to 0.2 moles of at least one acyl group selected from enanthyl, caprylyl, pelargonyl, capryl, undecanoyl, lauroyl, tridecanoyl, myristyl, pentadecanoyl, palmitoyl, heptadecanoyl, stearyl, nonadecanoyl, arachidyl, uneicosanoyl, behenyl, trieicosanoyl, lignoceryl, pentaleicosanoyl, cerotyl, and from greater than 2.3 to 2.7 moles of acetyl groups; and wherein said polyester composition exhibits a heat deflection temperature when measured according to ASTM D648-16 method B which is at least equal to or greater than polyester A. ### Claim 11 (depends on 1) The polyester composition of claim 1 wherein the poly alpha-1,3-glucan ester comprises from 1 to 3 moles of acyl groups and wherein at least 50 percent of the acyl groups are acetyl groups and the remaining acyl groups are selected from C3 to C5 acyl groups. ### Claim 12 A polyester composition comprising: A) from about 10 to about 80 weight percent of at least one polyester selected from the group consisting of poly(trimethylene terephthalate), polyethylene terephthalate, polybutylene terephthalate, and copolymers thereof; and B) from about 20 to about 90 weight percent of at least one poly alpha-1,3-glucan ester having a degree of substitution of from about 2.3 to 2.8 moles of acetyl groups. ### Claim 13 (depends on 12) The polyester composition of claim 12 comprising: A) from about 10 to about 75 weight percent of at least one polyester selected from the group consisting of poly(trimethylene terephthalate), polyethylene terephthalate, polybutylene terephthalate, and copolymers thereof; and B) from about 25 to about 90 weight percent of at least one poly alpha-1,3-glucan ester having a degree of substitution of from about 2.3 to 2.8 moles of acetyl groups; and wherein said polyester composition exhibits an impact strength when measured according to ASTM 256-10 which is at least 50 percent greater than polyester A. ### Claim 14 (depends on 1) A process of making the polyester composition of claim 1 comprising the step of mixing: a) about 10 to 95 wt. % of at least one polyester resin; b) about 5 to about 90 wt. % of at least one poly alpha-1,3-glucan ester; c) optionally, about 0.01 to 10 wt. % of at least one additive selected from the group consisting of nucleating agents, waxes, ultraviolet stabilizers, colorants, antioxidants, formaldehyde scavengers, lubricants, impact modifiers, plasticizers, and mixtures of these; to prepare a polyester composition wherein the total concentration of ingredients is based on the weight of ingredients (a), (b), and (c), and wherein the total concentration of ingredients equals 100 weight percent.