# US 2020/0399457 A1 · Enhancing Bond Strength Of Medical Devices > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2020/0399457 A1 - Document ID: US20200399457A1 - Status: Published application - Kind: A1 - Application number: 17/012,932 - Filed: 2020-09-04 - Published: 2020-12-24 - Earliest claimed: 2016-09-26 - Assignees: Becton, Dickinson and Company - Applicants: Becton, Dickinson and Company - Inventors: Jianbin Zhang; Theresa Hermel-Davidock; Edward Bryan Coughlin; Tea Datashvili - Web page: https://patentgrep.com/patent/US20200399457A1 ## CPC - C08L 23/20: having four to nine carbon atoms - A61L 27/16: obtained by reactions only involving carbon-to-carbon unsaturated bonds - C08L 23/06: Polyethylene - C08L 23/12: Polypropene - F16L 13/103: {Adhesive joints} - C08L 2203/18: used for pipes - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - A61L: METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES (preservation of bodies or disinfecting characterised by the agents employed A01N; preserving, e.g. sterilising, food or foodstuffs A23; preparations for medical, dental or toiletry purposes A61K) - F16L: PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL ## Abstract Components of medical devices include polypropylene-poly(ethylene oxide) amphiphilic graft copolymers (PP-g-PEO) in their base polymer formulations. The base polymeric formulations comprise at least a polymer or co-polymer of propylene. These components are suitable for solvent-bonding with other components and enhance bond strength of the medical devices. ## Claims ### Claim 1 A tubing for a medical device formed from a blend comprising: a base polymeric formulation comprising: polyethylene, polypropylene, or combinations thereof; and a thermoplastic elastomer (TPE) comprising a total polyethylene and/or polypropylene in an amount of at least 60 mol %; wherein the base polymeric formulation excludes free poly(ethylene oxide); and an additive comprising a polypropylene-poly(ethylene oxide) amphiphilic graft copolymer (PP-g-PEO copolymer), the PP-g-PEO copolymer being effective to enhance solvent bonding of the tubing to a connector. ### Claim 2 (depends on 1) The tubing of claim 1, wherein the PP-g-PEO copolymer is present in the blend in an amount in the range of 0.01 to 2.5% by weight of the blend. ### Claim 3 (depends on 1) The tubing of claim 1, wherein the PP-g-PEO is a product of ethylene oxide ring-opening polymerization of a polypropylene-maleic anhydride co-polymer (PP-MA) having from 10-50 weight percent of maleic anhydride. ### Claim 4 (depends on 1) The tubing of claim 1, wherein the PP-g-PEO copolymer is according to Formula (I): wherein R is hydrogen, alkyl, substituted alkyl, vinylic substituted alkyl, hydrocarbyl, substituted hydrocarbyl, or vinylic substituted hydrocarbyl group; the molar percentages of grafted maleic anhydride units, m, is in the range from 2 to 10 mole percent; the molar values of propylene units, n, is in the range from 98 to 90 mole percent, and p is in the range of 5 to 500 ethylene oxide units. ### Claim 5 (depends on 1) The tubing of claim 1, wherein the base polymeric formulation consists of the polypropylene and the thermoplastic elastomer (TPE) comprising the total polyethylene and/or polypropylene in the amount of at least 60 mol %. ### Claim 6 (depends on 1) The tubing of claim 1, wherein the PP-g-PEO copolymer has a dispersity index in the range of 2 to 10. ### Claim 7 A medical device comprising: a tubing comprising: a polymeric blend consisting of a base polymeric formulation consisting of polyethylene, polypropylene, a thermoplastic elastomer (TPE) comprising a total polyethylene and/or polypropylene in an amount of at least 60 mol %, or combinations thereof, and excluding free poly(ethylene oxide); and an additive comprising a polypropylene-poly(ethylene oxide) amphiphilic graft copolymer (PP-g-PEO copolymer) according to Formula (I): wherein R is hydrogen, alkyl, substituted alkyl, vinylic substituted alkyl, hydrocarbyl, substituted hydrocarbyl, or vinylic substituted hydrocarbyl group; the molar percentages of grafted maleic anhydride units, m, is in the range from 2 to 10 mole percent; the molar values of propylene units, n, is in the range from 98 to 90 mole percent, and p is in the range of 5 to 500 ethylene oxide units; wherein the PP-g-PEO copolymer is present in the blend in an amount in the range of 0.01 to 2.5% by weight of the blend; and a connector bonded to the tubing; wherein the PP-g-PEO copolymer is effective to enhance solvent bonding of the tubing to the connector. ### Claim 8 (depends on 6) The medical device of claim 6, wherein the base polymeric formulation consists of the polypropylene and the thermoplastic elastomer (TPE) comprising the total polyethylene and/or polypropylene in the amount of at least 60 mol %. ### Claim 9 (depends on 6) The medical device of claim 6, wherein the PP-g-PEO copolymer is a product of ethylene oxide ring-opening polymerization of an ethylene vinyl acetate copolymer having from 10 to 40 weight percent of vinyl acetate. ### Claim 10 (depends on 6) The medical device of claim 6, wherein the connector comprises a polar material selected from the group consisting of: poly(methyl methacrylate) (PMMA), styrene maleic anhydride (SMA), polycarbonate (PC), and methyl methacrylate-acrylonitrile-butadiene-styrene (MABS). ### Claim 11 A medical tubing manufactured by a process comprising: melting a polymeric base consisting of polyethylene, polypropylene, a thermoplastic elastomer (TPE) comprising a total polyethylene and/or polypropylene in an amount of at least 60 mol %, or combinations thereof, and excluding free poly(ethylene oxide) at a temperature in the range of 60° C. to 300° C. to form a melted polymeric base; adding an additive comprising a polypropylene-poly(ethylene oxide) amphiphilic graft copolymer (PP-g-PEO copolymer) to the melted polymeric base to form a blend the PP-g-PEO copolymer being present in the blend in an amount in the range of 0.01 to 2.5% by weight of the blend; mixing the blend for a time period in the range of 15 seconds to 90 seconds; and melt extruding the blend to form the tubing. ### Claim 12 (depends on 10) The medical tubing of claim 10, wherein the PP-g-PEO copolymer is according to Formula (I): wherein R is hydrogen, alkyl, substituted alkyl, vinylic substituted alkyl, hydrocarbyl, substituted hydrocarbyl, or vinylic substituted hydrocarbyl group; the molar percentages of grafted maleic anhydride units, m, is in the range from 2 to 10 mole percent; the molar values of propylene units, n, is in the range from 98 to 90 mole percent, and p is in the range of 5 to 500 ethylene oxide units. ### Claim 13 (depends on 10) The medical tubing of claim 10, wherein the base polymeric formulation consists of the polyethylene and the thermoplastic elastomer (TPE) comprising the total polyethylene and/or polypropylene in the amount of at least 60 mol %. ### Claim 14 A method of making a medical device comprising: obtaining a polypropylene-poly(ethylene oxide) amphiphilic graft copolymer (PP-g-PEO); combining the PP-g-PEO with a base polymeric formulation comprising at least a polymer or co-polymer of ethylene or propylene and excluding free poly(ethylene oxide) to form a blend, the PP-g-PEO being present in the blend in an amount in the range of about 0.01 to about 5.0% by weight of the blend; forming a tubing from the blend; bonding the tubing to a connector in the presence of a solvent to form the medical device; wherein the PP-g-PEO is effective to enhance bonding of the tubing to a connector. ### Claim 15 (depends on 14) The method of claim 14, wherein ethylene oxide ring-opening polymerization of a polypropylene-maleic anhydride co-polymer (PP-MA) having from 10-50 weight percent of maleic anhydride is used to form the PP-g-PEO, which is according to Formula (I): wherein R is hydrogen, alkyl, substituted alkyl, vinylic substituted alkyl, hydrocarbyl, substituted hydrocarbyl, or vinylic substituted hydrocarbyl group; the molar percentages of grafted maleic anhydride units, m, is in the range from 2 to 10 mole percent; the molar values of propylene units, n, is in the range from 98 to 90 mole percent, and p is in the range of 5 to 500 ethylene oxide units. ### Claim 16 (depends on 14) The method of claim 14, wherein the base polymeric formulation comprises polyethylene, polypropylene, a polyethylene-polypropylene co-polymer, a polyethylene-and/or polypropylene-containing thermoplastic elastomer (TPE), or combinations thereof. ### Claim 17 (depends on 16) The method of claim 16, wherein the base polymeric formulation comprises a co-polymer of polyethylene and polypropylene. ### Claim 18 (depends on 16) The method of claim 16, wherein the polyethylene-and/or polypropylene-containing thermoplastic elastomer (TPE) comprises at least 60 mol % polyethylene and/or polypropylene. ### Claim 19 (depends on 16) The method of claim 16, wherein the base polymeric formulation consists of the polypropylene and the thermoplastic elastomer (TPE) comprising the total polyethylene and/or polypropylene in the amount of at least 60 mol %, and the PP-g-PEO copolymer is present in the blend in an amount in the range of 0.01 to 2.5% by weight of the blend. ### Claim 20 (depends on 14) The method of claim 14, wherein: combining the PP-g-PEO copolymer with the base polymeric formulation comprises: melting the base polymeric formulation at a temperature in the range of 60° C. to 300° C. to form a melted polymeric base and mixing the blend for a time period in the range of 15 seconds to 90 seconds; and forming the tubing comprises melt extruding the blend.