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    SURFACE CROSSLINKED POLYETHYLENE
    2.
    发明申请
    SURFACE CROSSLINKED POLYETHYLENE 有权
    表面交联聚乙烯

    公开(公告)号：US20150322239A1

    公开(公告)日：2015-11-12

    申请号：US14806031

    申请日：2015-07-22

    Applicant: Howmedica Osteonics Corp.

    Inventor： Shulin He ,  Zongtao Zhang ,  Keenan Michael Hanson ,  Shi-Shen Yau

    IPC: C08K5/1545

    CPC classification number: C08J3/245 ,  A61L27/16 ,  A61L27/50 ,  A61L2400/18 ,  A61L2430/02 ,  C08J7/123 ,  C08J2323/06 ,  C08K5/1545 ,  C08L23/06

    Abstract: A method for producing a wear resistant polyethylene medical implant includes forming a medical implant, such as an orthopedic implant, made at least partially of ultra high molecular weight polyethylene (UHMWPE). The polyethylene may be irradiated with gamma ray or e-beam radiation to form free radicals and then crosslinked to eliminate free radicals prior to exposure to oxygen. The so treated bearing surface of the crosslinked polyethylene is then coated with a photoinitiator. Thereafter the bearing material is photocrosslinked with ultra-violet (UV) radiation. The photocrosslinking process can also be applied to non-crosslink UHMWPE.

    Abstract translation: 用于制造耐磨聚乙烯医疗植入物的方法包括形成至少部分由超高分子量聚乙烯（UHMWPE）制成的医疗植入物，例如矫形植入物。 可以用γ射线或电子束辐射照射聚乙烯以形成自由基，然后在暴露于氧气之前进行交联以消除自由基。 然后用光引发剂涂覆如此处理的交联聚乙烯的承载表面。 此后，轴承材料与紫外（UV）辐射光交联。 光交联工艺也可应用于非交联UHMWPE。

    POLYETHYLENE CROSS-LINKED WITH AN ANTHOCYANIN
    3.
    发明申请
    POLYETHYLENE CROSS-LINKED WITH AN ANTHOCYANIN 有权
    聚苯乙烯与蒽醌连接

    公开(公告)号：US20130064711A1

    公开(公告)日：2013-03-14

    申请号：US13623254

    申请日：2012-09-20

    Applicant: Howmedica Osteonics Corp.

    Inventor： Shulin He ,  Shi-Shen Yau ,  Aiguo Wang ,  Daniel E. Lawrynowicz

    IPC: A61L2/14 ,  A61L2/20 ,  A61L2/08 ,  C08F10/02 ,  C08J3/28

    CPC classification number: A61L2/14 ,  A61L2/08 ,  A61L2/20 ,  A61L27/16 ,  A61L27/505 ,  C08F10/02 ,  C08J3/28 ,  C08L53/00 ,  C08L2666/02 ,  C08L23/06

    Abstract: A method for manufacturing of ultrahigh molecular weight polyethylene (UHMWPE) for implants, where the implants have been machined out of UHMWPE blocks or extruded rods, has anthocyanin dispersely imbedded in the polyethylene. The implant is then exposed to γ ray or electron beam irradiation in an amount of at least 2.5 Mrad followed by a heat treatment to prevent the implant from becoming brittle in the long term as well as to improve strength and wear. The method includes mixing a powder or granulate resin of UHMWPE with an aqueous liquid that contains anthocyanin in a predetermined amount. The water is then evaporated to deposit the anthocyanin in a predetermined concentration on the polyethylene particles. The doped UHMWPE particles are compressed into blocks at temperatures in a range of approximately 135° C.-250° C. and pressures in a range of approximately 2-70 MPa. Medical implants are made from the blocks.

    Abstract translation: 用于植入物的超高分子量聚乙烯（UHMWPE）的制造方法，其中植入物已经由UHMWPE块或挤出棒加工而成，其中花青素分散嵌入聚乙烯中。 然后将植入物暴露于至少2.5Mrad的γ射线或电子束照射，然后进行热处理，以防止植入物在长期内变脆，并提高强度和磨损。 该方法包括将UHMWPE的粉末或颗粒状树脂与含有预定量的花青素的含水液体混合。 然后将水蒸发以将预定浓度的花色苷沉积在聚乙烯颗粒上。 掺杂的UHMWPE颗粒在约135℃-250℃的温度和约2-70MPa范围内的压力下被压缩成块。 医疗植入物由块体制成。

    Polyethylene cross-linked with an anthocyanin
    4.
    发明授权
    Polyethylene cross-linked with an anthocyanin 有权
    聚乙烯与花青素交联

    公开(公告)号：US08439975B2

    公开(公告)日：2013-05-14

    申请号：US13623254

    申请日：2012-09-20

    Applicant: Howmedica Osteonics Corp.

    Inventor： Shulin He ,  Shi-Shen Yau ,  Aiguo Wang ,  Daniel E. Lawrynowicz

    IPC: A61F2/02

    CPC classification number: A61L2/14 ,  A61L2/08 ,  A61L2/20 ,  A61L27/16 ,  A61L27/505 ,  C08F10/02 ,  C08J3/28 ,  C08L53/00 ,  C08L2666/02 ,  C08L23/06

    Abstract: A method for manufacturing of ultrahigh molecular weight polyethylene (UHMWPE) for implants, where the implants have been machined out of UHMWPE blocks or extruded rods, has anthocyanin dispersely imbedded in the polyethylene. The implant is then exposed to γ ray or electron beam irradiation in an amount of at least 2.5 Mrad followed by a heat treatment to prevent the implant from becoming brittle in the long term as well as to improve strength and wear. The method includes mixing a powder or granulate resin of UHMWPE with an aqueous liquid that contains anthocyanin in a predetermined amount. The water is then evaporated to deposit the anthocyanin in a predetermined concentration on the polyethylene particles. The doped UHMWPE particles are compressed into blocks at temperatures in a range of approximately 135° C.-250° C. and pressures in a range of approximately 2-70 MPa. Medical implants are made from the blocks.

    Abstract translation: 用于植入物的超高分子量聚乙烯（UHMWPE）的制造方法，其中植入物已经由UHMWPE块或挤出棒加工而成，其中花青素分散嵌入聚乙烯中。 然后将植入物以至少2.5Mrad的量暴露于γ射线或电子束照射，然后进行热处理，以防止植入物在长期内变脆，并且改善强度和磨损。 该方法包括将UHMWPE的粉末或颗粒状树脂与含有预定量的花青素的含水液体混合。 然后将水蒸发以将预定浓度的花色苷沉积在聚乙烯颗粒上。 掺杂的UHMWPE颗粒在约135℃-250℃的温度和约2-70MPa范围内的压力下被压缩成块。 医疗植入物由块体制成。

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