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    Balloons made from liquid crystal polymer blends
    2.
    发明授权
    Balloons made from liquid crystal polymer blends 失效
    由液晶聚合物混合物制成的气球

    公开(公告)号：US06242063B1

    公开(公告)日：2001-06-05

    申请号：US08926905

    申请日：1997-09-10

    申请人： David A. Ferrera ,  George C. Michaels ,  Ralph J. Barry ,  Lixiao Wang ,  Jianhua Chen

    发明人： David A. Ferrera ,  George C. Michaels ,  Ralph J. Barry ,  Lixiao Wang ,  Jianhua Chen

    IPC分类号： A61M2510

    CPC分类号： A61M25/1029 ,  A61L29/049 ,  A61L29/14 ,  A61M2025/1031 ,  B29C49/22 ,  B29L2022/022 ,  B29L2031/7542 ,  Y10T428/1334 ,  Y10T428/1345 ,  Y10T428/139 ,  Y10T428/1393 ,  Y10T428/31797

    摘要： Balloons for use on medical devices such as catheter balloons are formed from polymer blend products which include a liquid crystal polymer (LCP), a crystallizable thermoplastic polymer, especially thermoplastic polyesters such as PET, and a compatabilizer. The compatabilizer may be an ethylene-maleic anhydride copolymer, an ethylene-methyl acrylate copolymer, an ethylene-methyl acrylate copolymer, an ethylene-methyl acrylate-maleic anhydride terpolymer, an ethylene-methyl-methacrylic acid terpolymer, an acrylic rubber, an ethylene-ethyl acrylate-glycidyl methacrylate terpolymer or a mixture of two or more such polymers.

    摘要翻译： 用于诸如导管球囊的医疗装置上的气球由聚合物共混产物形成，其包括液晶聚合物（LCP），可结晶的热塑性聚合物，特别是热塑性聚酯如PET，以及组合物。 该分解剂可以是乙烯 - 马来酸酐共聚物，乙烯 - 丙烯酸甲酯共​​聚物，乙烯 - 丙烯酸甲酯共​​聚物，乙烯 - 丙烯酸甲酯 - 马来酸酐三元共聚物，乙烯 - 甲基 - 甲基丙烯酸三元共聚物，丙烯酸橡胶，乙烯 丙烯酸乙酯 - 甲基丙烯酸缩水甘油酯三元共聚物或两种或更多种这样的聚合物的混合物。

    Process for manufacturing polybutylene terephthalate (PBT) catheter balloons
    3.
    发明授权
    Process for manufacturing polybutylene terephthalate (PBT) catheter balloons 有权
    聚对苯二甲酸丁二醇酯（PBT）导管气球的制造方法

    公开(公告)号：US06787095B2

    公开(公告)日：2004-09-07

    申请号：US10179646

    申请日：2002-06-24

    申请人： Lixiao Wang ,  Jianhua Chen

    发明人： Lixiao Wang ,  Jianhua Chen

    IPC分类号： B29C4700

    CPC分类号： A61M25/1029 ,  A61L29/06 ,  A61M2025/1031 ,  C08K3/38 ,  C08L67/02 ,  Y10T428/1352 ,  Y10T428/139 ,  C08L2666/02

    摘要： A processing technique and a composition which allow compositions of PBT polymers or copolymers to be formed into blow molded articles, especially medical balloons such as dilatation or stent placement balloons, from extruded tubular parisons. The process includes a longitudinal stretch step run at a temperature below the Tg of the polymeric material and a radial expansion step run at a temperature above the Tg of the polymeric material. During the longitudinal stretch step, the tubing is subjected to high internal pressure. In the composition a small amount of boric acid is added to the polybutylene terephthalate in a melt blend to give a formulation which has reduced crystallinity after extrusion and which can more readily fashioned into high strength blow molded articles than PBT by itself. Articles, which may be formed using the invention include medical device balloon articles in which the polymer consists essentially of PBT optionally blended with boric acid.

    摘要翻译： 一种加工技术和组合物，其允许PBT聚合物或共聚物的组合物从挤出的管状型坯形成吹塑制品，特别是医疗气囊如膨胀或支架放置气球。 该方法包括在低于聚合物材料的Tg的温度下运行的纵向拉伸步骤和在高于聚合物材料的Tg的温度下运行的径向膨胀步骤。 在纵向拉伸步骤期间，管道受到高的内部压力。 在组合物中，在熔融共混物中将少量硼酸加入到聚对苯二甲酸丁二醇酯中，得到挤出后结晶度降低且比PBT本身更容易形成高强度吹塑制品的制剂。 可以使用本发明形成的制品包括其中聚合物基本上由PBT任选与硼酸共混的医疗装置球囊制品。

    Block copolymer elastomer catheter balloons
    5.
    发明授权
    Block copolymer elastomer catheter balloons 失效

    公开(公告)号：US07618696B2

    公开(公告)日：2009-11-17

    申请号：US10080781

    申请日：2002-02-22

    申请人： Lixiao Wang ,  Jianhua Chen

    发明人： Lixiao Wang ,  Jianhua Chen

    IPC分类号： B29D22/00 ,  B29D23/00 ,  B32B1/08

    CPC分类号： A61M25/1027 ,  A61L29/06 ,  A61L29/14 ,  A61M25/1029 ,  B29L2031/7542 ,  Y10T428/1334 ,  Y10T428/1352 ,  Y10T428/139 ,  Y10T428/1393 ,  Y10T428/1397 ,  C08L77/12 ,  C08L67/02

    摘要： Balloons for medical devices, particularly balloon angioplasty catheters, are made from particular block copolymer thermoplastic elastomers in which the block copolymer is made up of hard segments of a polyester or polyamide and soft segments of polyether; the polyester hard segments are polyesters of an aromatic dicarboxylic acid and a C2-C4 diol; the polyamide hard segments are polyamides of C6 or higher carboxylic acids and C6 or higher organic diamines or of C6 or higher aliphatic ω-amino-α-acids, and the polyether soft segments are polyethers of C2-C10, diols; the block copolymer has a low flexural modulus, namely less than 150,000 psi; the block copolymer has a hardness, Shore D scale, of greater than 60; and the percentage by weight of the block polymer attributable to the hard segments is between about 50% and about 95%. The polymers provide high strength, thin wall, compliant and semi-compliant balloons, which leads to a low profile catheter. The low profile catheters have very good initial crossing, good trackability, good recrossing after first inflation.

    Composition and process for manufacturing PBT catheter balloons
    7.
    发明授权
    Composition and process for manufacturing PBT catheter balloons 有权
    制造PBT导管气球的组成和工艺

    公开(公告)号：US06465067B1

    公开(公告)日：2002-10-15

    申请号：US09706266

    申请日：2000-11-03

    申请人： Lixiao Wang ,  Jianhua Chen

    发明人： Lixiao Wang ,  Jianhua Chen

    IPC分类号： B29D2202

    CPC分类号： A61M25/1029 ,  A61L29/06 ,  A61M2025/1031 ,  C08K3/38 ,  C08L67/02 ,  Y10T428/1352 ,  Y10T428/139 ,  C08L2666/02

    摘要： A processing technique and a composition which allow compositions of PBT polymers or copolymers to be formed into blow molded articles, especially medical balloons such as dilatation or stent placement balloons, from extruded tubular parisons. The process includes a longitudinal stretch step run at a temperature below the Tg of the polymeric material and a radial expansion step run at a temperature above the Tg of the polymeric material. During the longitudinal stretch step, the tubing is subjected to high internal pressure. In the composition a small amount of boric acid is added to the polybutylene terephthalate in a melt blend to give a formulation which has reduced crystallinity after extrusion and which can more readily fashioned into high strength blow molded articles than PBT by itself. Articles, which may be formed using the invention include medical device balloon articles in which the polymer consists essentially of PBT optionally blended with boric acid.

    摘要翻译： 一种加工技术和组合物，其允许PBT聚合物或共聚物的组合物从挤出的管状型坯形成吹塑制品，特别是医疗气囊如膨胀或支架放置气球。 该方法包括在低于聚合物材料的Tg的温度下运行的纵向拉伸步骤和在高于聚合物材料的Tg的温度下运行的径向膨胀步骤。 在纵向拉伸步骤期间，管道受到高的内部压力。 在组合物中，在熔融共混物中将少量硼酸加入到聚对苯二甲酸丁二醇酯中，得到挤出后结晶度降低且比PBT本身更容易形成高强度吹塑制品的制剂。 可以使用本发明形成的制品包括其中聚合物基本上由PBT任选与硼酸共混的医疗装置球囊制品。

    Block copolymer elastomer catheter balloons
    10.
    发明授权
    Block copolymer elastomer catheter balloons 失效

    公开(公告)号：US5830182A

    公开(公告)日：1998-11-03

    申请号：US805899

    申请日：1997-02-25

    申请人： Lixiao Wang ,  Jianhua Chen

    发明人： Lixiao Wang ,  Jianhua Chen

    IPC分类号： A61L29/06 ,  A61L29/14 ,  A61M29/00

    CPC分类号： A61L29/14 ,  A61L29/06 ,  B29L2031/7542

    摘要： Balloons for medical devices, particularly balloon angioplasty catheters, are made from particular block copolymer thermoplastic elastomers in which the block copolymer is made up of hard segments of a polyester or polyamide and soft segments of polyether; the polyester hard segments are polyesters of an aromatic dicarboxylic acid and a C.sub.2 -C.sub.4 diol; the polyamide hard segments are polyamides of C.sub.6 or higher carboxylic acids and C.sub.6 or higher organic diamines or of C.sub.6 or higher aliphatic .omega.-amino-.alpha.-acids, and the polyether soft segments are polyethers of C.sub.2 -C.sub.10, diols; the block copolymer has a low flexural modulus, namely less than 150,000 psi; the block copolymer has a hardness, Shore D scale, of greater than 60; and the percentage by weight of the block polymer attributable to the hard segments is between about 50% and about 95%. The polymers provide high strength, thin wall, compliant and semi-compliant balloons, which leads to a low profile catheter. The low profile catheters have very good initial crossing, good trackability, good recrossing after first inflation.