Resin transfer molding process for composites
    1.
    发明授权
    Resin transfer molding process for composites 失效
    复合材料的树脂传递模塑工艺

    公开(公告)号:US5730922A

    公开(公告)日:1998-03-24

    申请号:US679324

    申请日:1996-07-12

    摘要: A laminate has at least two layers, at least one of which comprises a polymer having more than one perfluorocyclobutane group. Such polymers impart qualities of environmental or protection, chemical and solvent resistance, hydrolytic stability, lubricity, low dielectric, hydrostatic stability, weatherability, flame resistance, chemical resistance, hydrolytic stability, lubricity, environmental protection, scratch resistance, solvent resistance, surface passivation, water repellancy, lower surface refractive index, lower surface coefficient of friction, fluid barrier properties, oil repellancy, thermal stability, and/or reduced moisture pick-up. Additionally, the coatings are optically clear, easy to apply either neat, in a solvent or otherwise, have relatively low cure temperatures for their temperature resistance, and exhibit insulating and planarizing capabilities.

    摘要翻译: 层压体具有至少两层,其中至少一层包含具有多于一个全氟环丁烷基团的聚合物。 这些聚合物赋予环境或保护性,耐化学性和耐溶剂性,水解稳定性,润滑性,低电介质,静水稳定性,耐候性,阻燃性,耐化学性,水解稳定性,润滑性,环境保护,耐刮擦性,耐溶剂性,表面钝化, 防水性,下表面折射率,较低的表面摩擦系数,流体阻隔性,拒油性,热稳定性和/或降低的吸湿性。 此外,涂层是光学透明的,易于在溶剂中施用,或者以其它方式施加,其耐温度具有相对低的固化温度,并且具有绝缘和平坦化能力。

    Alignment layer for a liquid crystal in a liquid crystal display device
    3.
    发明授权
    Alignment layer for a liquid crystal in a liquid crystal display device 失效
    液晶显示装置中的液晶对准层

    公开(公告)号:US5540997A

    公开(公告)日:1996-07-30

    申请号:US402588

    申请日:1995-03-13

    IPC分类号: G02F1/1337 C09K19/56

    摘要: An alignment layer for a liquid crystal display device is described. The alignment layer comprises a copolymer of a thermoset polymer containing perfluorinated cyclobutane rings and a thermoplastic polymer containing perfluorinated cylcobutane rings, or a blend of thermoset and thermoplastic homopolymers or copolymers containing perfluorinated cyclobutane rings.This copolymer or blend provides an alignment layer with a cure temperature of less than 250.degree. C., a low dielectric, and a low moisture content. The resultant alignment layer can also provide surface tilt angles suitable for supertwisted nematic-liquid crystal displays.

    摘要翻译: 对液晶显示装置的取向膜进行说明。 取向层包含含有全氟化环丁烷环的热固性聚合物和含有全氟化环丁烷环的热塑性聚合物的共聚物,或含有全氟化环丁烷环的热固性和热塑性均聚物或共聚物的共混物。 该共聚物或共混物提供具有小于250℃,低电介质和低含水量的固化温度的取向层。 所得到的取向层还可以提供适用于超扭曲向列型液晶显示器的表面倾斜角度。

    Reactive compounds containing perfluorovinyl groups
    9.
    发明授权
    Reactive compounds containing perfluorovinyl groups 失效
    含全氟乙烯基的活性化合物

    公开(公告)号:US5198513A

    公开(公告)日:1993-03-30

    申请号:US668294

    申请日:1991-03-12

    摘要: A compound having at least one perfluorovinyl group and at least one functional group is suitable for reacting with and/or forming polymers. The compound is preferably of Formula I:(G)n-R-(X--CF.dbd.CF.sub.2).sub.mwherein R represents an optionally substituted hydrocarbyl group, X represents any group which links R and a perfluorovinyl group; n is the number of G groups, m is the number of (XCF.dbd.CF.sub.2) groups; and G represents any reactive functional group or a group convertible into a reactive functional groups.A process for preparing a compound of Formula I comprises the steps of:(a) preparing a 2-halotetrafluoro compound of the Formula III:(Q--CF.sub.2 --CF.sub.2 -X).sub.m -R-(G").sub.n wherein R, X, m and n are as described for Formula I and Q is bromine, chlorine or iodine; and G" is a functional group, or a functional group suitable for conversion into G;(b) chemically modifying group G" to produce functional group G; and(c) dehalogenating the 2-halotetrafluoro compound to form the corresponding trifluorovinyl compound.

    摘要翻译: 具有至少一个全氟乙烯基和至少一个官能团的化合物适于与聚合物反应和/或形成聚合物。 化合物优选为式I:(G)n-R-(X-CF = CF 2)m,其中R表示任选取代的烃基,X表示连接R和全氟乙烯基的任何基团; n是G基团的数目,m是(XCF = CF 2)基团的数目; G表示任何反应性官能团或可转化为反应性官能团的基团。 制备式I化合物的方法包括以下步骤:(a)制备式III的2-卤代四氟化合物:(Q-CF2-CF2-X)mR-(G“)n,其中R,X, m和n如式I所述,Q是溴,氯或碘; G“是官能团,或适合转化为G的官能团; (b)化学修饰基团G“以产生官能团G; 和(c)使2-卤代四氟化合物脱卤以形成相应的三氟乙烯基化合物。