# US 12,110,370 B2 · Polyester composition and elastomer coated article made therewith > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,110,370 B2 - Document ID: US12110370B2 - Status: Granted - Kind: B2 - Application number: 17/897,953 - Filed: 2022-08-29 - Published: 2023-03-09 - Granted: 2024-10-08 - Earliest claimed: 2021-08-30 - Assignees: Celanese International Corporation - Applicants: Celanese International Corporation - Inventors: Qamer Zia; Kirsten Markgraf; Dirk Zierer; Patrick Nickolay - Web page: https://patentgrep.com/patent/US12110370B2 ## CPC - C08J 5/043: {with glass fibres} - C08L 67/02: Polyesters derived from dicarboxylic acids and dihydroxy compounds (C08L67/06 takes precedence) - B29C 45/16: Making multilayered or multicoloured articles {(B29C45/0062 takes precedence; feeding colouring materials into the injection unit B29C45/1816)} - C08K 3/40: Glass - C08K 7/14: Glass - C08J 2367/02: Polyesters derived from dicarboxylic acids and dihydroxy compounds; (C08J2367/06 takes precedence) - C08J 2367/03: the dicarboxylic acids and dihydroxy compounds having the hydroxy and the carboxyl groups directly linked to aromatic rings - C08J 2467/02: Polyesters derived from dicarboxylic acids and dihydroxy compounds (C08J2467/06 takes precedence) - 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) - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00) - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) ## Abstract A polyester polymer composition is disclosed containing reinforcing fibers and having improved adhesion to elastomeric materials while also being formulated for medical applications and/or food service applications. The polyester polymer composition can contain a blend of different polyester polymers and can be free of hindered phenolic antioxidants. The polyester polymer composition can be used in overmolding applications in which the composition is initially molded into a polymer component and then overmolded with an elastomeric material. The elastomeric material can contain a copolyester elastomer and can serve as a sealing member. ## Claims ### Claim 1 A multi-component polymer article comprising: a polymer component comprising a mixture of a first polyester polymer and a second polyester polymer, the first polyester polymer having a different crystallization rate than the second polyester polymer, the polymer component further comprising reinforcing fibers and a nucleating agent, the reinforcing fibers being present in the polymer component in an amount from 7% to 50% by weight, the polymer component being free of hindered phenolic antioxidants; and an elastomeric component applied directly to a surface of the polymer component, the elastomeric component having a density from 1.05 g/cm3 to 1.2 g/cm3. ### Claim 2 (depends on 1) A multi-component polymer article as defined in claim 1, wherein the elastomeric component comprises a copolyester. ### Claim 3 (depends on 1) A multi-component polymer article as defined in claim 1, wherein the elastomeric component comprises a thermoplastic copolyester elastomer comprising a block copolymer of polybutylene terephthalate and polyether or dimerdiol segments. ### Claim 4 (depends on 1) A multi-component polymer article as defined in claim 1, wherein the elastomeric component comprises a thermoplastic copolyester elastomer comprising a thermoplastic ester ether elastomer. ### Claim 5 (depends on 1) A multi-component polymer article as defined in claim 1, wherein elastomer component comprises a thermoplastic copolyester elastomer in an amount greater than 70% by weight. ### Claim 6 (depends on 1) A multi-component polymer article as defined in claim 1, wherein the polymer component and elastomeric component display a peeling force of greater than about 50 N. ### Claim 7 (depends on 1) A multi-component polymer article as defined in claim 1, wherein the first polyester polymer comprises a polybutylene terephthalate polymer. ### Claim 8 (depends on 7) A multi-component polymer article as defined in claim 7, wherein the second polyester polymer comprises a polyethylene terephthalate polymer. ### Claim 9 (depends on 7) A multi-component polymer article as defined in claim 7, wherein the polybutylene terephthalate polymer has a melt flow rate of greater than 40 g/10 min. and less than 120 g/10 min. ### Claim 10 (depends on 8) A multi-component polymer article as defined in claim 8, wherein the polyethylene terephthalate polymer is present in the polymer component in an amount from 25% by weight to 35% by weight and wherein the polybutylene terephthalate polymer is present in the polymer component in an amount from 40% by weight to 60% by weight. ### Claim 11 (depends on 1) A multi-component polymer article as defined in claim 1, wherein the multi-component polymer article comprises a medical device. ### Claim 12 (depends on 1) A multi-component polymer article as defined in claim 1, wherein the multi-component polymer article comprises a medical inhaler or medical injector. ### Claim 13 (depends on 1) A multi-component polymer article as defined in claim 1, wherein the elastomeric component forms a sealing member on the polymer component.