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    • 1. 发明授权
    • Compatibilized fluoroplastic blends
    • 增容的氟塑料共混物
    • US5741855A
    • 1998-04-21
    • US660998
    • 1996-06-10
    • Bruce KadukKeith DawesAwtar SinghJing Tian
    • Bruce KadukKeith DawesAwtar SinghJing Tian
    • C08J3/24C08L23/08C08L23/26C08L27/12C08L27/18C08L53/00C08L27/16
    • C08L23/08C08L27/12C08L27/18C08L53/00
    • A composition comprises a blend of (a) a first crystalline fluoroplastic which is an ethylene-tetrafluoroethylene copolymer, in an amount between 30 and 70 weight %; (b) a second crystalline fluoroplastic which is a terpolymer of tetrafluoroethylene, hexafluoropropylene, and vinylidene fluoride, in an amount between 30 and 65 weight %; and (c) a fluorinated thermoplastic elastomer which is a block copolymer having at least one elastomeric segment comprising tetrafluoroethylene, vinylidene fluoride, and hexafluoropropylene repeat units in a mole ratio 45-90:5-50:0-35 and at least one nonelastomeric segment comprising tetrafluoroethylene and ethylene repeat units, in an amount between 5 and 25 weight %. The fluorinated thermoplastic elastomer acts as a compatibilizer for the two fluoroplastics. The composition exhibits improved flexibility, tensile strength, and/or elongation.
    • 组合物包含(a)作为乙烯 - 四氟乙烯共聚物的第一结晶氟塑料的混合物,其量为30至70重量%; (b)作为四氟乙烯,六氟丙烯和偏二氟乙烯的三元共聚物的第二结晶氟塑料,其量为30至65重量%; 和(c)氟化热塑性弹性体,其是具有至少一个弹性体链段的嵌段共聚物,该弹性链段包含摩尔比为45-90:5-50:0-35的四氟乙烯,偏二氟乙烯和六氟丙烯重复单元,以及至少一个非弹性链段 包括四氟乙烯和乙烯重复单元,其量为5至25重量%。 氟化热塑性弹性体用作两种氟塑料的增容剂。 组合物显示出改善的柔韧性,拉伸强度和/或伸长率。
    • 4. 发明授权
    • Cavity sealing article and method
    • 腔密封制品及方法
    • US5979902A
    • 1999-11-09
    • US925422
    • 1997-09-08
    • Rong J. ChangKeith Dawes
    • Rong J. ChangKeith Dawes
    • B29C44/18B60R13/02B60R13/08B62D29/00G10K11/162G10K11/168F16J15/14
    • B62D29/002B29C44/188B60R13/02B60R13/08G10K11/162G10K11/168
    • A cavity sealing article for use in a longitudinally extending cavity defined by cavity walls, the cavity having a cross-section within the cavity walls which is to be sealed at a predetermined location, comprises: (a) a driver comprising a crosslinked foamable polymer, the driver having a size, shape, and expansion ratio on foaming such that, when foamed within the cross-section of the cavity at the predetermined location, it substantially but incompletely occupies the cross-section of the cavity; and (b) a sealer comprising an uncrosslinked foamable polymer in intimate contact with the driver and surrounding the driver in the cross-section of the cavity, the sealer having a size, shape, and expansion ratio on foaming such that, when the cavity sealing article as a whole is foamed, the foamed sealer is forced into intimate and sealing contact with the cavity walls.
    • 一种用于由空腔壁限定的纵向延伸空腔的空腔密封制品,所述空腔具有在预定位置被密封的空腔壁内的横截面,包括:(a)驱动器,其包括交联的可发泡聚合物, 驱动器具有发泡时的尺寸,形状和膨胀比,使得当在预定位置处在空腔的横截面内发泡时,其基本上但不完全占据空腔的横截面; 和(b)密封剂,其包含与驱动器紧密接触且在空腔的横截面中围绕驱动器的未交联的可发泡聚合物,所述密封剂具有在发泡时的尺寸,形状和膨胀比,使得当腔密封 制品作为一个整体是发泡的,泡沫密封剂被迫与空腔壁紧密地密封接触。
    • 5. 发明授权
    • Reinforced rubber
    • 加强橡胶
    • US4118367A
    • 1978-10-03
    • US763117
    • 1977-01-27
    • Keith DawesRoger James Rowley
    • Keith DawesRoger James Rowley
    • C08L7/00C07F7/18C08K5/00C08K5/5455C08K5/5465C08L21/00C08K5/54
    • C07F7/1836C08K5/54C08K5/5455Y10S524/925
    • The invention relates to the production of silica reinforced rubber incorporating a novel azo-silane coupling agent which does not depend on the vulcanization reaction to effect coupling to the rubber. The novel coupling agents are of the general formula:Y -- X -- CO -- N .dbd. N -- CO -- X.sup.1 -- Zwhere X and X.sup.1 are the same or different and each is an imino group, an oxygen atom, or a substituted or unsubstituted methylene group; Y is a substituted or unsubstituted alkyl, aryl or aralkyl group or is the same as Z; and Z as an alkyl, aryl or aralkyl group which has an substituent at least one silane group of the formula: --Si(OR).sub.3 or --OSi(OR).sub.3 in which R is a straight or branched chain alkyl group. The azo-silane is typically used in amounts of from .1 to 10 pphr. Silica reinforced rubber vulcanizates produced using the azo-silane can have improved properties e.g. abrasion resistance, scorch resistance and resilience as compared with vulcanizates made using conventional coupling agents.
    • 本发明涉及二氧化硅增强橡胶的生产,该二氧化硅增强橡胶结合有不依赖于硫化反应以实现与橡胶偶合的新型偶氮硅烷偶联剂。 新型偶联剂具有以下通式: