-
公开(公告)号：US06395359B1
公开(公告)日：2002-05-28
申请号：US08910844
申请日：1997-08-13
IPC分类号： E21D1552
CPC分类号： F15B21/06 , F15B15/1428 , Y10T428/1393 , Y10T428/1397
摘要： Corrosion resistance is provided for a power cylinder by providing a preloaded molded urethane elastomer sleeve liner within an outer cylinder of material such as a copper/nickel alloy which is subject to corrosion from long-term exposure to ambient fluids such as sea water. Preloading is preferably provided by thermal shrink fitting of the molded urethane sleeve liner to the inner bore of an outer metal cylinder. Preloading of a structure which has high structural integrity and low permeability thus effectively prevents incursion of fluids and gases at the interface between the outer cylinder and the sleeve liner as well as providing a surface which can be machined to a high degree of smoothness and against which reciprocating piston seals and wear assemblies can directly ride and which is resistant to abrasion therefrom even at high piston speeds.
摘要翻译： 通过在诸如铜/镍合金的材料的外圆筒内提供预加载的模制的聚氨酯弹性体套筒衬套来提供动力缸的耐腐蚀性，该铜/镍合金从长期暴露于诸如海水的环境流体中经受腐蚀。 优选通过模制的聚氨酯套筒衬套与外金属圆筒的内孔的热收缩配合来提供预加载。 具有高结构完整性和低渗透性的结构的预加载因此有效地防止了流体和气体在外筒和套筒衬套之间的界面处的侵入以及提供可被加工成高度平滑度的表面， 往复式活塞密封件和磨损组件可以直接骑行，即使在高活塞速度下也能抵抗磨损。
-
32.发明授权
公开(公告)号：US5357040A
公开(公告)日：1994-10-18
申请号：US22049
申请日：1993-02-24
申请人： James E. McGrath , Keith R. Lyon , Richey M. Davis , Ann Texier , Atilla Gungor
发明人： James E. McGrath , Keith R. Lyon , Richey M. Davis , Ann Texier , Atilla Gungor
CPC分类号： C08J3/12 , C08G65/4093 , C08G65/48 , C08J2365/00 , H05K1/0373
摘要： Fine particles of semi-crystalline ketone-containing aromatic polymers (PEEK, PEKK, etc.) are produced by controlling the rate and conditions of hydrolysis of an amorphous polyarylketimine intermediate. The choice of acid and its concentrations affects the rate of ketimine hydrolysis and subsequent particle formation. In addition, zero or reduced amounts of agitation during hydrolysis has been found to promote the formation of smaller (submicron) sized particles which are spherical in shape, while greater amounts of agitation or shear stress applied during hydrolysis results in nonspherical, larger particles. Carbon fiber reinforced composites were made from aqueous suspensions of these particles that were dispersed or stabilized by a water soluble polymer.
摘要翻译： 通过控制无定形聚芳基酮亚胺中间体的水解速率和条件来制备含半结晶酮芳族聚合物（PEEK，PEKK等）的微粒。 酸和其浓度的选择影响酮亚胺水解和随后的颗粒形成速率。 此外，已经发现在水解期间零或减少的搅拌量促进了形状为球形的较小（亚微米）尺寸的颗粒的形成，而在水解期间施加的较大量的搅拌或剪切应力导致非球形的较大颗粒。 碳纤维增强复合材料由水溶性聚合物分散或稳定的这些颗粒的水悬浮液制成。
-
33.发明授权Poly(amide-acid) compositions derived from tetracarboxylic acid dianhyrides capable of solution imidization 失效衍生自能够进行酰亚胺化的四羧酸二甘醚的聚（酰胺酸）组合物
公开(公告)号：US5194565A
公开(公告)日：1993-03-16
申请号：US735488
申请日：1991-07-25
申请人： James E. McGrath , Attila Gungor
发明人： James E. McGrath , Attila Gungor
CPC分类号： C08G73/1057 , C08G79/04
摘要： The imidization temperature of poly(amide-acid) compositions derived from tetracarboxylic acid dianhydrides can be lowered by use of a bis(aminophenoxyphenyl) phosphine oxide in the diamine component which is reacted with the dianhydride. These homo- or copolyimides can be cyclized without use of catalysts or excessive temperature which can product undesired side reactions. Tough film forming materials can be produced which show excellent thermo-oxidative stability and high char yields even at 800.degree. C. in air.
摘要翻译： 通过在与二酐反应的二胺组分中使用双（氨基苯氧基苯基）氧化膦，可以降低由四羧酸二酐衍生的聚（酰胺酸）组合物的酰亚胺化温度。 这些均聚或共聚酰亚胺可以不使用催化剂或过高的温度环化，这可能产生不希望的副反应。 可以生产即使在空气中800℃下显示优异的热氧化稳定性和高焦炭产率的耐热成膜材料。
-
公开(公告)号：US5166274A
公开(公告)日：1992-11-24
申请号：US560265
申请日：1990-07-30
申请人： James E. McGrath , Timothy E. Long , Allan D. Broske , Lu H. Tung
发明人： James E. McGrath , Timothy E. Long , Allan D. Broske , Lu H. Tung
IPC分类号： C08F297/02
CPC分类号： C08F297/026
摘要： Novel diene/methacrylate ester block polymers, especially tertiary butyl methacrylate ester block polymers are uniquely prepared at near ambient temperatures and capable of being hydrolyzed and neutralized to yield the corresponding methacrylic acid and methacrylic acid salt (ionomer) derivatives. The compositions are usefully employed in the preparation of thermoplastic elastomers, adhesives and laminating films.
摘要翻译： 新的二烯/甲基丙烯酸酯嵌段聚合物，特别是甲基丙烯酸叔丁酯酯嵌段聚合物在接近环境温度下独特地制备并且能够水解和中和以产生相应的甲基丙烯酸和甲基丙烯酸盐（离聚物）衍生物。 该组合物有用地用于制备热塑性弹性体，粘合剂和层合膜。
-
35.发明授权Polyarylene ethers and polyarylene sulfides containing phosphine oxide group and modified by reaction with organoamine 失效含有氧化膦基团的聚亚烷基二醇和聚亚烷基硫酸酯，并与有机胺反应进行了改性
公开(公告)号：US5134207A
公开(公告)日：1992-07-28
申请号：US393205
申请日：1989-08-14
IPC分类号： C08G79/02
CPC分类号： C08G79/02
摘要： Phosphine oxide-containing polyarylene ethers and sulfides can be reacted with organoamines to form novel graft copolymers (with monofunctional amines) or novel crosslinked thermosetting network compositions (with multifunctional amines). The network materials show desirable resistance to a variety of organic solvents including chloroform.
摘要翻译： 含氧化膦的聚亚芳基醚和硫化物可与有机胺反应形成新的接枝共聚物（与单官能胺）或新型交联的热固性网络组合物（具有多官能胺）。 网络材料显示出对各种有机溶剂（包括氯仿）的耐受性。
-
公开(公告)号：US5098959A
公开(公告)日：1992-03-24
申请号：US560266
申请日：1990-07-30
IPC分类号： C08F297/02 , C09J153/00
CPC分类号： C08F297/026 , C09J153/00
摘要： Novel methacrylate ester block polymers comprising both a hydrolyzable and a non-hydrolyzable ester functionality are capable of being partially hydrolyzed and neutralized to yield the corresponding methacrylic acid and methacrylic acid salt (ionomer) derivatives. The compositions are usefully employed in the preparation of thermoplastic elastomers, adhesives and laminating films.
摘要翻译： 包含可水解和不可水解的酯官能团的新的甲基丙烯酸酯嵌段聚合物能够被部分水解和中和以产生相应的甲基丙烯酸和甲基丙烯酸盐（离聚物）衍生物。 该组合物有用地用于制备热塑性弹性体，粘合剂和层合膜。
-
37.发明授权Primary polyether active hydrogen compounds which are prepared from linked, protectively initiated polyalkyleneoxides 失效由连接的保护性引发的聚亚烷基氧化物制备的初级聚醚活性氢化合物
公开(公告)号：US4943626A
公开(公告)日：1990-07-24
申请号：US226302
申请日：1988-07-29
CPC分类号： C08G65/12 , C08G18/48 , C08G65/2648 , C08G65/2651 , C08G65/324
摘要： Polyether active hydrogen compounds having at least two terminal active hydrogen groups on primary carbon atoms are prepared by (a) forming polyoxyalkylene molecules each having at least one active hydrogen precursor, (b) linking at least two of the polyoxyalkylene molecules, and (c) converting the active hydrogen precursor groups to active hydrogen groups on primary carbon atoms. The polyoxyalkylene molecule is formed by exposing a reaction mixture comprising at least one alkylene oxide and at least one protective initiator to conditions effective for the polymerization of the alkylene oxides. Linking is accomplished at polyether chain ends distal to the protected active hydrogen precursor groups, such that the active hydrogen precursors remain on the linked polyether chains until they are converted to active hydrogen groups. The process is particularly useful to produce polyether compounds having at least about 80 mole percent primary active hydrogen groups, which compounds are useful, for instance, in forming polyurethanes.
-
38.发明授权公开(公告)号：US08551511B2
公开(公告)日：2013-10-08
申请号：US12577203
申请日：2009-10-11
IPC分类号： A61F13/00
CPC分类号： C08G64/42 , A61L31/148 , C08G63/08 , C08G63/672 , C08G63/6822 , C08G63/6856 , C08G63/912 , C08G64/0241 , C08G64/12 , C08G65/3326 , C08G65/33313 , C08G65/337 , C08G2261/126 , C08L67/02 , C08L69/00 , C08L2203/02 , C08L2205/05 , C08L2666/02
摘要： A variety of phase-separated biocompatible polymer compositions are described. In preferred embodiments the polymers are bioresorbable and/or biodegradable, and have desirable mechanical properties, such as fracture and/or fatigue toughness, that have previously not been a primary design criteria for such polymers. The polymer compositions are useful in a variety of medical applications, such as in the fabrication of medical devices.
摘要翻译： 描述了各种相分离的生物相容性聚合物组合物。 在优选的实施方案中，聚合物是生物可再吸收的和/或可生物降解的，并且具有以前不是这种聚合物的主要设计标准的期望的机械性能，例如断裂和/或疲劳韧性。 聚合物组合物可用于各种医疗应用中，例如在医疗装置的制造中。
-
公开(公告)号：US20110213456A1
公开(公告)日：2011-09-01
申请号：US13101391
申请日：2011-05-05
IPC分类号： A61F2/82 , C08F220/18 , C08F8/14
CPC分类号： A61L31/18 , A61F2/92 , A61K49/12 , A61K49/126 , A61K49/128 , A61L31/06 , C08F220/00 , C08G63/00 , C08G63/08
摘要： Side-chain crystallizable (SCC) polymers are useful in various medical applications. In certain applications, heavy atom containing side-chain crystallizable polymers (HACSCCP's) are particularly useful. An example of a HACSCCP is a polymer that comprises a main chain, a plurality of crystallizable side chains, and a plurality of heavy atoms attached to the polymer. In certain configurations, the heavy atoms are present in an amount that is effective to render the polymer radiopaque. A polymeric material that includes an HACSCCP may be fabricated into a medical device useful for at least partially occluding a body cavity. For example, such a medical device may be an embolotherapy product. A polymeric material that includes a SCC polymer may also be fabricated into other medical devices, such as stents.
摘要翻译： 侧链可结晶（SCC）聚合物可用于各种医疗应用。 在某些应用中，含重链原子的侧链可结晶聚合物（HACSCCP）特别有用。 HACSCCP的实例是包含主链，多个可结晶侧链和连接到聚合物上的多个重原子的聚合物。 在某些构型中，重质原子以有效使聚合物不透射线的量存在。 包括HACSCCP的聚合物材料可以制造成用于至少部分地封闭体腔的医疗装置。 例如，这种医疗装置可以是电疗产品。 包括SCC聚合物的聚合物材料也可制成其他医疗装置，例如支架。
-
公开(公告)号：US07375178B2
公开(公告)日：2008-05-20
申请号：US11475542
申请日：2006-06-27
CPC分类号： C08G79/04
摘要： High refractive index, melt processable polyphosphonates and methods for preparing the same are provided. These polymers are particularly useful for optical and ophthalmic parts, such as lenses. A method of preparing optical and ophthalmic lenses by injection molding the polymers of the present invention into the form of the optical or ophthalmic lenses is also provided.
摘要翻译： 提供高折射率，可熔融加工的聚膦酸盐及其制备方法。 这些聚合物特别适用于光学和眼科部件，例如透镜。 还提供了通过将本发明的聚合物注射成光学或眼科镜片的形式来制备光学和眼科镜片的方法。
-
-
-
-
-
-
-
-
-
搜索结果
47 条记录 (耗时 0.021 秒)