# US 2022/0033646 A1 · Flame Resistant and Hydrolysis Resistant Polyester Composition and Connectors Made Therefrom > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2022/0033646 A1 - Document ID: US20220033646A1 - Status: Published application - Kind: A1 - Application number: 17/389,577 - Filed: 2021-07-30 - Published: 2022-02-03 - Earliest claimed: 2020-07-30 - Assignees: Celanese International Corporation - Applicants: Celanese International Corporation - Inventors: Qamer Zia; Dirk Zierer; Kirsten Markgraf; Patrick Nickolay - Web page: https://patentgrep.com/patent/US20220033646A1 ## CPC - C08L 67/02: Polyesters derived from dicarboxylic acids and dihydroxy compounds (C08L67/06 takes precedence) - C08G 63/183: Terephthalic acids - C08K 5/0066: {Flame-proofing or flame-retarding additives} - C08K 5/34924: {containing cyanurate groups; Tautomers thereof} - C08K 5/5313: Phosphinic compounds, e.g. R2=P(:O)OR' - C08K 5/56: Organo-metallic compounds, i.e. organic compounds containing a metal-to-carbon bond - C08K 7/14: Glass - C08K 9/06: with silicon-containing compounds - C08L 79/08: Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors - H01R 13/527: Flameproof cases (H01R13/70 takes precedence) - C08K 2201/003: Additives being defined by their diameter - C08K 2201/004: Additives being defined by their length - C08L 2201/02: Flame or fire retardant/resistant - C08L 2203/20: use in electrical or conductive gadgets - C08L 2205/025: containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure - C08L 2205/03: containing three or more polymers in a blend - C08L 2205/08: containing additives to improve the compatibility between two polymers - H01R 2201/26: for vehicles - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) - H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS ## Abstract Halogen-free, flame resistant and hydrolysis resistant polymer compositions are disclosed. The polymer composition contains a thermoplastic polymer, such as polybutylene terephthalate. The thermoplastic polymer is combined with a flame retardant that can include a phosphinate, a phosphite, and a nitrogen-containing synergist. In addition, the composition can contain various hydrolysis resistant components. For instance, the polyester polymer incorporated into the composition can have a relatively low amount of carboxyl end groups. In addition, the composition can contain reinforcing fibers that are coated with a hydrolysis resistant agent. The composition can also contain an organometallic compatibilizer. ## Claims ### Claim 1 A polymer composition comprising: a polyester polymer, the polyester polymer having carboxyl end groups in an amount less than about 20 mmol/kg, the polyester polymer being present in the polymer composition in an amount greater than about 40% by weight; a flame retardant composition contained within the polymer composition, the flame retardant composition comprising a non-halogen flame retardant; and reinforcing fibers dispersed throughout a polymer matrix formed from the polyester polymer, the reinforcing fibers being coated with a sizing composition comprising a sizing agent combined with a hydrolysis resistant agent. ### Claim 2 (depends on 1) A polymer composition as defined in claim 1, wherein the polyester polymer comprises a polybutylene terephthalate polymer. ### Claim 3 (depends on 1) A polymer composition as defined in claim 1, further comprising a polycarbodiimide. ### Claim 4 (depends on 3) A polymer composition as defined in claim 3, wherein the wherein the polycarbodiimide has a weight average molecular weight of 10,000 g/mol or greater. ### Claim 5 (depends on 1) A polymer composition as defined in claim 1, wherein the reinforcing fibers comprise glass fibers, the sizing agent comprising a silane. ### Claim 6 (depends on 1) A polymer composition as defined in claim 1, wherein the sizing composition is present on the reinforcing fibers in an amount from about 0.1% to about 4% by weight of the reinforcing fibers. ### Claim 7 (depends on 1) A polymer composition as defined in claim 1, wherein the reinforcing fibers have an average fiber length of from about 1 mm to about 5 mm and have an average fiber diameter of from about 8 microns to about 12 microns. ### Claim 8 (depends on 1) A polymer composition as defined in claim 1, wherein the flame retardant composition comprises a metal phosphinate, and a nitrogen-containing synergist. ### Claim 9 (depends on 8) A flame resistant polymer composition as defined in claim 8, wherein the flame retardant composition further comprises aluminum phosphite, wherein the metal phosphinate comprises an aluminum diethyl phosphinate, wherein the nitrogen-containing synergist comprises melamine cyanurate. ### Claim 10 (depends on 1) A flame resistant polymer composition as defined in claim 1, wherein the polymer composition further contains an organometallic compatibilizer. ### Claim 11 (depends on 10) Aflame resistant polymer composition as defined in claim 10, wherein the organometallic compatibilizer comprises a titanate. ### Claim 12 (depends on 10) Aflame resistant polymer composition as defined in claim 10, wherein the organometallic compatibilizer comprises titanium IV 2-propanolato,tris(dioctyl)phosphato-O. ### Claim 13 (depends on 10) A flame resistant polymer composition as defined in claim 10, wherein the organometallic compatibilizer is present in the polymer composition in an amount from about 0.05% to about 2.5% by weight. ### Claim 14 (depends on 1) A flame resistant polymer composition as defined in claim 1, wherein the polymer composition further contains an ester of a carboxylic acid. ### Claim 15 (depends on 1) A flame resistant polymer composition as defined in claim 1, wherein the polymer composition has a melt flow rate of at least 4 cm3/10 min when tested at a temperature of 250° C. and at a load of 2.16 kg. ### Claim 16 (depends on 1) A flame resistant polymer composition as defined in claim 1, wherein the polymer composition, when tested according to a Vertical Burn Test according to Underwriters Laboratories Test 94, has a rating of V-0 when tested at a thickness of 1.5 mm. ### Claim 17 (depends on 1) A polymer composition as defined in claim 1, wherein the reinforcing fibers comprise glass fibers, the glass fibers being present in the polymer composition in an amount from about 10% to about 40% by weight. ### Claim 18 (depends on 1) A polymer composition as defined in claim 1, wherein when the polymer composition is subjected to the Hydrolysis Test at 121° C., a tensile modulus of the polymer composition reduces by no more than about 50% after 168 hours. ### Claim 19 (depends on 1) A polymer composition as defined in claim 1, wherein when the polymer composition is subjected to the Hydrolysis Test at 121° C., a Charpy notched strength at 23° C. of the polymer composition reduces by no more than about 50% after 168 hours. ### Claim 20 (depends on 1) An electrical connector that comprises at least two opposing walls between which a passageway is defined for receiving a contact element, the walls being formed from a polymer composition as defined in claim 1.