RADIOOPAQUE, IODINE FUNCTIONALIZED PHENYLALANINE-BASED POLY(ESTER UREA)S

    公开(公告)号:US20170081476A1

    公开(公告)日:2017-03-23

    申请号:US15330815

    申请日:2015-05-07

    IPC分类号: C08G71/02 A61L27/18 A61L27/56

    CPC分类号: C08G71/02 A61L27/18 A61L27/56

    摘要: In one or more embodiments, the present invention provides iodine-functionalized phenylalanine-based poly(ester urea)s (PEUs) (and related methods for their synthesis and use) that are metal free, degradable, radiopaque and suitable for use in surgical implants and other medical devices used within a patient. In one or more embodiment of the present invention 4-Iodo-L-phenylalanine and L-phenylalanine are separately reacted with 1,6-hexanediol to produce two monomers, bis-4-I-L-phenylalanine-1,6-hexanediol-diester (1-IPHE-6 monomer) and bis-L-phenylalanine-1,6-hexanediol-diester (1-PHE-6 monomer). It has been found that by varying the feed ratio of the 1-IPHE-6 and 1-PHE-6 monomers, the copolymer composition may be modulated to predictably create phenylalanine-based PEUs having a wide variation in thermal, mechanical and radiopacity properties. As most medical device procedures require placement verification via fluoroscopic imaging, materials that possess inherent X-ray contrast are valuable for a number of applications.

    BIORESORBABLE,STEREOCHEMICALLY DEFINED ELASTOMERS AND METHODS OF MAKING AND USING SAME

    公开(公告)号:US20230383056A1

    公开(公告)日:2023-11-30

    申请号:US18182146

    申请日:2023-03-10

    IPC分类号: C08G63/688

    CPC分类号: C08G63/6888

    摘要: In various embodiments, the present invention relates to a series of anti-fouling zwitterionic biodegradable thiol-yne elastomers that incorporate degradable C4-C14 dicarboxylic acid-based monomer units made using a nucleophilic thiol-yne polymerization methodology that targets high cis-content at comparable molar masses to provide excellent mechanical properties and zwitterionic side chains that provide anti fouling properties. As each C4-C14 dicarboxylic acid-based monomer unit contains at least two labile ester linkages, altering the stoichiometry of degradable C4-C14 dicarboxylic acid-based monomer unit incorporation allows the degradation rate of the material to be tuned precisely, while retaining control over the mechanical properties by maintaining the cis/trans stereochemistry of the double bonds to provide independent tuning of mechanical and degradative properties.

    Pressure differential distribution system
    6.
    发明授权
    Pressure differential distribution system 有权
    压差分配系统

    公开(公告)号:US06983757B1

    公开(公告)日:2006-01-10

    申请号:US10110646

    申请日:2000-08-24

    IPC分类号: B67D5/08

    摘要: An pressure differential distribution system which offers an pressure differential reaction element (1) made of a comfortable, flexible pressure differential interface (2) that is attached to a support element (3), which in conjunction with a difference in pressure between the interior volume of the differential reaction element (1) can conform to various extended or reduced conformers. The flexible pressure differential interface (2) may retract within an enclosure(4). An emission removal adaptor (12) or terminal interface (23) may be coupled to a substance source (10) to capture or move substances on a pressure differential from a first zone to a second zone.

    摘要翻译: 一种压差分布系统,其提供由连接到支撑元件(3)的舒适的柔性压差界面(2)制成的压差反应元件(1),其结合内部体积 差示反应元件(1)可以符合各种延伸或缩合构象异构体。 柔性压差界面(2)可以在外壳(4)内缩回。 排放物去除适配器(12)或终端接口(23)可以耦合到物质源(10)以捕获或移动在从第一区域到第二区域的压力差上的物质。

    Star-shaped poly(propylene fumarate) copolymers for 3D printing applications

    公开(公告)号:US11661477B2

    公开(公告)日:2023-05-30

    申请号:US17274510

    申请日:2019-09-10

    IPC分类号: C08G63/58 B33Y70/00 B33Y80/00

    CPC分类号: C08G63/58 B33Y70/00 B33Y80/00

    摘要: In various embodiments, the invention relates to poly(propylene fumarate) (PPF)-based star-shaped copolymers synthesized using a core-first approach that uses a multi-functional alcohols as an initiator, and Mg(BHT)2(THF)2 as catalyst for controlled ring opening copolymerization (ROCOP) of maleic anhydride (MAn) with propylene oxide (PO). In some embodiments, these star-PPF copolymers have lower viscosities than their linear analogs, allowing a decrease in DEF fraction in resin formulation, as well as the use of higher molecular weights. These star-shape PPF can be used to prepare PPF:DEF resins containing as much as 70% by weight of the multi-arm PPF star copolymers, and have a low complex viscosity of high Mn star PPF resin that affords rapid printing with a Mn nearly eight times larger than the largest linear PPF oligomer printed previously.

    Radioopaque, iodine functionalized phenylalanine-based poly(ester urea)s

    公开(公告)号:US10280261B2

    公开(公告)日:2019-05-07

    申请号:US15330815

    申请日:2015-05-07

    摘要: In one or more embodiments, the present invention provides iodine-functionalized phenylalanine-based poly(ester urea)s (PEUs) (and related methods for their synthesis and use) that are metal free, degradable, radiopaque and suitable for use in surgical implants and other medical devices used within a patient. In one or more embodiment of the present invention 4-Iodo-L-phenylalanine and L-phenylalanine are separately reacted with 1,6-hexanediol to produce two monomers, bis-4-I-L-phenylalanine-1,6-hexanediol-diester (1-IPHE-6 monomer) and bis-L-phenylalanine-1,6-hexanediol-diester (1-PHE-6 monomer). It has been found that by varying the feed ratio of the 1-IPHE-6 and 1-PHE-6 monomers, the copolymer composition may be modulated to predictably create phenylalanine-based PEUs having a wide variation in thermal, mechanical and radiopacity properties. As most medical device procedures require placement verification via fluoroscopic imaging, materials that possess inherent X-ray contrast are valuable for a number of applications.