Advanced processing of absorbable poly(p-dioxanone) containing high level of p-dioxanone monomer

    公开(公告)号:US11028222B2

    公开(公告)日:2021-06-08

    申请号:US16202454

    申请日:2018-11-28

    Applicant: Ethicon, Inc.

    Abstract: The present invention is directed methods of making absorbable poly(p-dioxanone) pellets by melt polymerization of p-dioxanone conducted in a single reactor with a temperature regulator by charging a melt reactor with a mixture of p-dioxanone (PDO) monomer, initiator, catalyst, and optionally a dye; melt polymerizing the mixture in the melt reactor with sufficient agitation of the mixture to allow complete mixing of the monomer and for sufficient time to form a PDO polymer product having an unreacted PDO monomer content of at least 65 mole percent; placing the PDO polymer product under a vacuum to remove at least portion of unreacted PDO; discharging the PDO polymer product from the melt reactor directly into an in-line, underwater pelletizer to produce undried PDO pellets, collecting the undried PDO pellets, and storing the collected PDO pellets in the freezer or a vacuum chamber prior to drying.

    ABSORBABLE POLYMER FORMULATIONS
    16.
    发明申请
    ABSORBABLE POLYMER FORMULATIONS 有权
    可吸收的聚合物配方

    公开(公告)号:US20130089511A1

    公开(公告)日:2013-04-11

    申请号:US13691434

    申请日:2012-11-30

    Applicant: ETHICON, INC.

    Abstract: A co-polyester which includes the reaction product of a polycondensation polyester and epsilon-caprolactone, wherein the polycondensation polyester comprises the reaction product of diglycolic acid and/or a derivative thereof and a diol. The co-polyester is injectable and absorbable into animal, such as human, tissue and can be used for facial cosmetic or reconstructive surgery of soft tissue. Another embodiment is directed to a method for preventing adhesion using a co-polyester comprising the reaction product of a polycondensation polyester and epsilon-caprolactone, wherein the polycondensation polyester comprises the reaction product of diglycolic acid and/or a derivative thereof and a diol, and the co-polyester comprises about 40 to 50% by weight of the polycondensation polyester based on the total weight of the co-polyester.

    Abstract translation: 包括缩聚聚酯和ε-己内酯的反应产物的共聚酯,其中缩聚聚酯包括二甘醇酸和/或其衍生物与二醇的反应产物。 共聚酯是可注射的并且可吸收到动物中,例如人,组织,并且可以用于软组织的面部化妆品或重建手术。 另一个实施方案涉及使用包含缩聚聚酯和ε-己内酯的反应产物的共聚酯来防止粘合的方法,其中缩聚聚酯包括二甘醇酸和/或其衍生物与二醇的反应产物,和 共聚酯包含基于共聚酯总重量的约40至50重量%的缩聚聚酯。

    Advanced Processing of Absorbable Poly(p-dioxanone) Containing High Level of p-Dioxanone Monomer

    公开(公告)号:US20210054141A1

    公开(公告)日:2021-02-25

    申请号:US17090192

    申请日:2020-11-05

    Applicant: Ethicon, Inc.

    Abstract: The present invention is directed methods of making absorbable poly(p-dioxanone) pellets by melt polymerization of p-dioxanone conducted in a single reactor with a temperature regulator by charging a melt reactor with a mixture of p-dioxanone (PDO) monomer, initiator, catalyst, and optionally a dye; melt polymerizing the mixture in the melt reactor with sufficient agitation of the mixture to allow complete mixing of the monomer and for sufficient time to form a PDO polymer product having an unreacted PDO monomer content of at least 65 mole percent; placing the PDO polymer product under a vacuum to remove at least portion of unreacted PDO; discharging the PDO polymer product from the melt reactor directly into an in-line, underwater pelletizer to produce undried PDO pellets, collecting the undried PDO pellets, and storing the collected PDO pellets in the freezer or a vacuum chamber prior to drying.

Patent Agency Ranking