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1. 发明授权

US06787095B2 Process for manufacturing polybutylene terephthalate (PBT) catheter balloons 有权
标题翻译：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。

2. 发明授权

US07101597B2 Medical devices made from polymer blends containing low melting temperature liquid crystal polymers 有权
公开(公告)号：US07101597B2
公开(公告)日：2006-09-05
申请号：US10012872
申请日：2001-12-12
申请人： Lixiao Wang , Jianhua Chen
发明人： Lixiao Wang , Jianhua Chen
IPC分类号： B29D22/02 , B29D23/00
CPC分类号： A61M25/0009 , A61F2/958 , A61L29/049 , A61L29/14 , A61M25/1029 , A61M2025/1084 , Y10T428/1334 , Y10T428/1341 , Y10T428/1352 , Y10T428/1372 , Y10T428/139
摘要： A medical device, at least a portion of which is composed of a polymeric material in which the polymeric material is a melt blend product of at least two different thermoplastic polymers, one of the thermoplastic polymers being a thermoplastic liquid crystal polymer (LCP) having a melting point of less than 250° C. The portion of the device made from the melt blend may be a catheter body segment or a balloon for a catheter. The LCP blends suitably also include a non-LCP base polymer having a melting point in the range of about 140° C. to about 265° C.

3. 发明授权

US06328925B1 Laminate catheter balloons with additive burst strength and methods for preparation of same 有权
标题翻译：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。

4. 发明授权

US06284333B1 Medical devices made from polymer blends containing low melting temperature liquid crystal polymers 有权
标题翻译：由含有低熔点液晶聚合物的聚合物共混物制成的医疗器械
公开(公告)号：US06284333B1
公开(公告)日：2001-09-04
申请号：US09257677
申请日：1999-02-25
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 , A61L29/049 , A61L29/126 , A61L29/14 , A61M25/1027 , B29C49/0005 , B29C49/04 , B29C49/22 , B29L2022/022 , B29L2031/7542 , Y10T428/1345 , Y10T428/1386 , Y10T428/1397 , C08L77/00
摘要： A medical device, at least a portion of which is composed of a polymeric material in which the polymeric material is a melt blend product of at least two different thermoplastic polymers, one of the thermoplastic polymers being a thermoplastic liquid crystal polymer (LCP) having a melting point of less than 250° C. The portion of the device made from the melt blend may be a catheter body segment or a balloon for a catheter. The LCP blends suitably also include a non-LCP base polymer having a melting point in the range of about 140° C. to about 265° C.
摘要翻译：一种医疗装置，其至少一部分由聚合材料构成，其中所述聚合物材料是至少两种不同的热塑性聚合物的熔融共混物，所述热塑性聚合物之一是热塑性液晶聚合物（LCP），其具有熔点低于250℃。由熔体共混物制成的装置的部分可以是导管主体部分或用于导管的气囊。 LCP共混物适合地还包括熔点在约140℃至约265℃范围内的非LCP基聚合物。

5. 发明授权

US06171278B2 Block copolymer elastomer catheter balloons 失效
标题翻译：嵌段共聚物弹性体导管气球
公开(公告)号：US06171278B2
公开(公告)日：2001-01-09
申请号：US08811761
申请日：1997-03-06
申请人： Lixiao Wang , Jianhua Chen
发明人： Lixiao Wang , Jianhua Chen
IPC分类号： A61M2900
CPC分类号： A61L29/06 , A61L29/14 , A61M25/1027 , A61M25/1029 , B29C2049/0089 , B29K2105/258 , B29L2022/022 , B29L2031/7542 , Y10T428/1352 , C08L77/12 , C08L67/02
摘要： Balloons for medical devices, particularly balloon angioplasty catheters, which have hybrid compliance curves are made from particular block copolymer thermoplastic elastomers. Melt blends of an engineering resin having by a flexural modulus of about 240,000 psi or greater and a block copolymer elastomer having a flexural modulus of about 150,000 psi or less, the block copolymer including at least one block which is structurally similar to the engineering resin are also used to produce medical device balloons.
摘要翻译：具有混合顺应性曲线的用于医疗装置，特别是球囊血管成形术导管的气球由特定的嵌段共聚物热塑性弹性体制成。具有约240,000psi或更大的挠曲模量的工程树脂和具有约150,000psi或更小的挠曲模量的嵌段共聚物弹性体的熔融共混物，所述嵌段共聚物包括至少一个在工程树脂上结构相似的嵌段，也用于生产医疗器械气球。

6. 发明授权

US5807520A Method of balloon formation by cold drawing/necking 失效
标题翻译：通过冷拉/颈缩形成球囊的方法
公开(公告)号：US5807520A
公开(公告)日：1998-09-15
申请号：US954453
申请日：1997-10-20
申请人： Lixiao Wang , Jianhua Chen , Nao Lee , Daniel J. Horn
发明人： Lixiao Wang , Jianhua Chen , Nao Lee , Daniel J. Horn
IPC分类号： A61L29/06 , A61L29/14 , A61M25/00 , B29C49/04 , B29C49/42 , B29C55/26 , B29C49/14 , B29C49/18 , B29C49/64
CPC分类号： A61M25/1029 , A61L29/06 , A61L29/14 , B29C49/04 , B29C49/4242 , B29C55/26 , B29L2031/7542
摘要： A method for forming a balloon for a dilatation catheter involving the steps of extruding a segment of thermoplastic material, maintaining the center portion at a temperature below the glass transition of the thermoplastic material, drawing the segment to a predetermined length, wherein after the drawing the wall thickness of the center portion does not appreciably change, and expanding the segment in a mold to produce the balloon.
摘要翻译：一种用于形成用于扩张导管的球囊的方法，其包括挤压一段热塑性材料的步骤，将中心部分保持在低于热塑性材料的玻璃化转变温度的温度下，将该段拉伸至预定长度，其中在拉伸之后中心部分的壁厚度不会明显改变，并且在模具中使该片段膨胀以产生气球。

7. 发明授权

US5556383A Block copolymer elastomer catheter balloons 失效
公开(公告)号：US5556383A
公开(公告)日：1996-09-17
申请号：US397837
申请日：1995-03-02
申请人： Lixiao Wang , Jianhua Chen
发明人： Lixiao Wang , Jianhua Chen
IPC分类号： A61M25/00 , A61L29/00 , A61L29/06 , A61L29/14 , A61M29/00
CPC分类号： A61M25/1027 , A61L29/06 , A61L29/14 , A61M25/1029 , 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.

8. 发明授权

US07700033B2 Block copolymer elastomer catheter balloons 失效
标题翻译：嵌段共聚物弹性体导管气球
公开(公告)号：US07700033B2
公开(公告)日：2010-04-20
申请号：US11653769
申请日：2007-01-16
申请人： Lixiao Wang , Jianhua Chen
发明人： Lixiao Wang , Jianhua Chen
IPC分类号： B29C49/04
CPC分类号： A61L29/049 , A61L29/06 , A61L29/085 , A61M25/1029 , Y10T428/1352 , C08L77/12
摘要： Balloons for medical devices, particularly balloon angioplasty catheters, which have hybrid compliance curves in which growth rate slows at higher pressures are made from block copolymer thermoplastic elastomers.
摘要翻译：用于医疗装置的气球，特别是球囊血管成形术导管，其具有在较高压力下生长速度减慢的混合顺应性曲线，由嵌段共聚物热塑性弹性体制成。

9. 发明授权

US07618696B2 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.

10. 发明授权

US07163522B1 Block copolymer elastomer catheter balloons 失效
标题翻译：嵌段共聚物弹性体导管气球
公开(公告)号：US07163522B1
公开(公告)日：2007-01-16
申请号：US09712042
申请日：2000-11-14
申请人： Lixiao Wang , Jianhua Chen
发明人： Lixiao Wang , Jianhua Chen
IPC分类号： A61M29/02 , A61M29/00
CPC分类号： A61L29/049 , A61L29/06 , A61L29/085 , A61M25/1029 , Y10T428/1352 , C08L77/12
摘要： Balloons for medical devices, particularly balloon agioplasty catheters, which have hybrid compliance curves in which growth rate slows at higher pressures are made from block copolymer thermoplastic elastomers.
摘要翻译：用于医疗装置的气球，特别是气囊成形术导管，其具有在较高压力下生长速度减慢的混合顺应性曲线，由嵌段共聚物热塑性弹性体制成。

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