# US 2020/0399446 A1 · Cellulose ester and polymeric aliphatic polyester compositions and articles > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2020/0399446 A1 - Document ID: US20200399446A1 - Status: Published application - Kind: A1 - Application number: 16/968,718 - Filed: 2019-02-13 - Published: 2020-12-24 - Earliest claimed: 2018-02-13 - Assignees: Eastman Chemical Company - Applicants: Eastman Chemical Company - Inventors: Haining An; Wenlai Feng; Michael Eugene Donelson; Thomas Joseph Pecorini - Web page: https://patentgrep.com/patent/US20200399446A1 ## CPC - C08L 1/10: Esters of organic acids {, i.e. acylates} - C08L 1/14: Mixed esters, e.g. cellulose acetate-butyrate - C08J 5/18: Manufacture of films or sheets - C08K 5/005: {Stabilisers against oxidation, heat, light, ozone} - C08L 67/02: Polyesters derived from dicarboxylic acids and dihydroxy compounds (C08L67/06 takes precedence) - C08L 67/04: Polyesters derived from hydroxycarboxylic acids, e.g. lactones (C08L67/06 takes precedence) - G02B 1/041: {Lenses} - C08J 2301/14: Mixed esters - C08J 2467/02: Polyesters derived from dicarboxylic acids and dihydroxy compounds (C08J2467/06 takes precedence) - C08L 2205/02: containing two or more polymers of the same C08L -group - C08L 2666/68: Plasticizers; Solvents - 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) - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract A cellulose ester composition is provided comprising at least one cellulose ester, at least one polymeric aliphatic polyester, at least one impact modifier, and at least one monomeric plasticizer. Processes for producing the cellulose ester compositions as well as articles made using these compositions, such as eyeglass or sunglass frames and/or lenses, are also provided. ## Claims ### Claim 1 A cellulose ester composition comprising at least one cellulose ester, at least one polymeric aliphatic polyester (PAP), at least one impact modifier and at least one monomeric plasticizer, wherein said at least one cellulose ester is chosen from cellulose propionate (CP), cellulose butyrate (CB), cellulose acetate propionate (CAP), cellulose acetate butyrate (CAB), cellulose propionate butyrate (CPB), cellulose tripropionate (CTP), or cellulose tributyrate (CTB); wherein the PAP is a polymeric aliphatic polyester that comprises either residues of a C2 to C4 alkane diol and residues of C4 to C8 alkyl dicarboxylic acid, or residues of a ring-opened lactone; wherein the monomeric plasticizer is present in an amount from 1 to 5 wt %, based on the total weight of the cellulose ester composition; wherein said cellulose ester composition has a Tg of at least 110° C. and a notched Izod impact strength of at least 80 J/m, measured according to ASTM Method D256 at 23° C. using a 3.2 mm bar, after conditioning the bar at 23° C. and 50% RH for 48 hours. ### Claim 2 (depends on 1) The cellulose ester composition according to claim 1, wherein said cellulose ester composition further has both a weld-line toughness and gate toughness of at least 100 J/m. ### Claim 3 (depends on 1) The cellulose ester composition according to claim 1, wherein said at least one PAP is chosen from poly(ethylene succinate) (PES), poly (butylene succinate) (PBS), poly(ethylene adipate) (PEA), poly(butylene adipate) (PBA), or mixtures thereof. ### Claim 4 (depends on 1) The cellulose ester composition according to claim 1, wherein said at least one PAP is poly(butylene succinate) (PBS) or a copolymer of poly(butylene succinate) and poly(butylene adipate) (PBSA). ### Claim 5 (depends on 1) The cellulose ester composition according to claim 1, wherein said composition comprises 65-95 wt % of said cellulose ester, 2-15 wt % of said PAP, 2-10 wt % of said impact modifier, and 1 to less than 5 wt % of said monomeric plasticizer, wherein said impact modifier is an acrylic core shell impact modifier. ### Claim 6 (depends on 1) The cellulose ester composition according to claim 1, wherein said composition comprises 65-95 wt % of said cellulose ester, 2-10 wt % of said PAP, 2 to 10 wt % of said impact modifier, and 1 to less than 5 wt % of said monomeric plasticizer. ### Claim 7 (depends on 1) The cellulose ester composition according to claim 1, wherein said composition comprises 65-95 wt % of said cellulose ester, 2-10 wt % of said PAP, 4 to 8 wt % of said impact modifier, and 2 to 4 wt % of said monomeric plasticizer. ### Claim 8 (depends on 1) The cellulose ester composition according to claim 1, wherein said cellulose ester is chosen from cellulose acetate propionate (CAP) or cellulose acetate butyrate (CAB). ### Claim 9 (depends on 1) The cellulose ester composition according to claim 1, wherein said PAP is PBS or PBSA having an MFR (190° C., 2.16 kg) less than 25. ### Claim 10 (depends on 1) The cellulose ester composition according to claim 1, wherein said PAP is PBS or PBSA having an Elongation at Break of 250% or greater. ### Claim 11 (depends on 1) The cellulose ester composition according to claim 1, wherein said PAP is PBS or PBSA having a polystyrene (PS) equivalent number average molecular weight (Mn) greater than 15,000. ### Claim 12 (depends on 1) The cellulose ester composition according to claim 1, wherein said cellulose ester is a cellulose acetate propionate (CAP) containing from about 10 to about 40% by weight propionyl. ### Claim 13 (depends on 1) The cellulose ester composition according to claim 1, wherein the cellulose ester composition has a notched Izod impact strength of at least 200 J/m, measured according to ASTM Method D256 at 23° C. using a 3.2 mm bar, after conditioning the bar at 23° C. and 50% RH for 48 hours. ### Claim 14 (depends on 1) The cellulose ester composition according to claim 1, wherein said composition further comprises at least one additive selected from the group consisting of antioxidants, thermal stabilizers, mold release agents, antistatic agents, whitening agents, colorants, minerals, UV stabilizers, lubricants, nucleating agents, reinforcing fillers, glass fiber, carbon fiber, flame retardants, dyes, pigments, colorants, additional resins and combinations thereof. ### Claim 15 (depends on 1) The cellulose ester composition according to claim 1, wherein said composition further comprises at least one polymeric component as a blend wherein said polymer is selected from the group consisting of nylons; polyesters; polyamides; polystyrenes; other cellulose esters, cellulose ethers; polystyrene copolymers; styrene acrylonitrile copolymers; polyolefins; polyurethanes; acrylonitrile butadiene styrene copolymers; poly(methylmethacrylate); acrylic copolymers; poly(ether-imides); polyphenylene oxides; polyvinylchlorides; polyphenylene sulfides; polyphenylene sulfide/sulfones; poly(ester-carbonates); polycarbonates; polysulfones; poly lactic acid; poly butylenesuccinate; polysulfone ethers; and poly(ether-ketones) of aromatic dihydroxy compounds; and combinations thereof. ### Claim 16 (depends on 1) An article of manufacture comprising the cellulose ester composition according to claim 1. ### Claim 17 (depends on 16) The article of manufacture according to claim 16, wherein the article is chosen from an injection molded article, extrusion molded article, injection blow molded article, injection stretch blow molded article, extrusion blow molded article, or a compression molded article. ### Claim 18 (depends on 16) The article of manufacture according to claim 16, wherein the article is an ophthalmic article. ### Claim 19 (depends on 18) The article of manufacture according to claim 18, wherein the ophthalmic article is an eyeglass or sunglass frame. ### Claim 20 (depends on 1) A film or sheet comprising a cellulose ester composition according to claim 1.