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    Laminate catheter balloons with additive burst strength and methods for preparation of same
    3.
    发明授权
    Laminate catheter balloons with additive burst strength and methods for preparation of same 有权
    层叠导管气球，具有添加爆破强度及其制备方法

    公开(公告)号：US06328925B1

    公开(公告)日：2001-12-11

    申请号：US09670074

    申请日：2000-09-26

    申请人： Lixiao Wang ,  Jianhua Chen ,  Nao Lee

    发明人： Lixiao Wang ,  Jianhua Chen ,  Nao Lee

    IPC分类号： B29C4700

    CPC分类号： B32B27/08 ,  A61M25/1029 ,  B29C49/24 ,  B29C2049/0089 ,  B29K2105/258 ,  B29K2995/005 ,  B29L2031/7542 ,  B32B1/08 ,  B32B7/02 ,  B32B27/281 ,  B32B27/285 ,  B32B27/34 ,  B32B27/36 ,  B32B27/40 ,  B32B2038/0028 ,  B32B2367/00 ,  B32B2371/00 ,  B32B2375/00 ,  B32B2377/00 ,  B32B2379/08 ,  B32B2535/00 ,  Y10S428/91 ,  Y10T428/1334 ,  Y10T428/1393 ,  Y10T428/24942

    摘要： A laminate balloon comprising at least two layers of separately oriented thermoplastic polymer material, which are coextensive over the body of the balloon. The two layers may be made of different polymer materials, including an underlying layer made of a low compliant, high strength polymer, such as PET, and an overlying layer of a softer and more flexible polymer material relative to the first polymer material, such as a polyester-polyether block copolymer. The balloon structures have an additive burst pressure, meaning that they are stronger than a single-layer reference balloon corresponding to the underlying polymer layer. The balloons are characterized by a combination of flexibility and surface softness which allows catheters to track down into lesions relatively easily, puncture resistance, abrasion resistance and refoldability, in addition to low compliance and high burst strength. The balloons may be prepared with generally linear or with stepped compliance profiles. Methods of preparation of such balloons are also disclosed.

    摘要翻译： 包括至少两层单独取向的热塑性聚合物材料的叠层气囊，其在气囊的主体上共同延伸。 两层可以由不同的聚合物材料制成，包括由低顺应性高强度聚合物（例如PET）制成的下层，以及相对于第一聚合物材料的较软和更柔性的聚合物材料的上层，例如 聚酯 - 聚醚嵌段共聚物。 气球结构具有附加爆破压力，这意味着它们比对应于下面的聚合物层的单层参考气球更强。 气囊的特征在于灵活性和表面柔软性的组合，除了低顺应性和高爆裂强度之外，还允许导管相对容易地追踪到损伤，抗穿刺性，耐磨性和再折叠性。 气囊可以以大致线性或阶梯式顺应性曲线制备。 还公开了制备这种气球的方法。

    Process for manufacturing polybutylene terephthalate (PBT) catheter balloons
    5.
    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
    7.
    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
    10.
    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。