Soluble catalyst systems for the preparation of polyalk-1-enes having
high molecular weights
    81.
    发明授权
    Soluble catalyst systems for the preparation of polyalk-1-enes having high molecular weights 失效
    用于制备高分子量聚烯-1-烯的可溶性催化剂体系

    公开(公告)号:US6096912A

    公开(公告)日:2000-08-01

    申请号:US642491

    申请日:1996-05-03

    摘要: Abstract of the Disclosure: Catalyst systems for the polymerization of C.sub.2 -C.sub.10 -alk-1-enes contain, as active components,a) a metallocene complex of the general formula I ##STR1## where M is titanium, zirconium, hafnium, vanadium, niobium or tantalum, X is halogen or C.sub.1 -C.sub.8 -alkyl, Y is carbon, phosphorus, sulfur, silicon or germanium, Z is C.sub.1 -C.sub.8 -alkyl, C.sub.3 -C.sub.10 -cycloalkyl or C.sub.6 -C.sub.10 -aryl, R.sup.1 and R.sup.2 are identical or different and are each C.sub.1 -C.sub.4 -alkyl, R.sup.3 to R.sup.6 are identical or different and are each hydrogen or C.sub.1 -C.sub.8 -alkyl, or two adjacent radicals R.sup.3 and R.sup.4 and R.sup.5 and R.sup.6 in each case together form a hydrocarbon ring system of 4 to 15 carbon atoms and n is 0, 1 or 2, andb) an open-chain or cyclic alumoxane compound of the general formula II or III ##STR2## where R.sup.7 is C.sub.1 -C.sub.4 -alkyl and n is from 5 to 30. The novel catalyst systems are particularly suitable for the preparation of polyalk-1-enes having high molecular weights.

    摘要翻译: 本发明摘要:用于C2-C10-烷-1-烯的聚合的催化剂体系包含作为活性组分的a)通式I的茂金属络合物,其中M是钛,锆,铪,钒,铌或钽 X是卤素或C 1 -C 8烷基,Y是碳,磷,硫,硅或锗,Z是C 1 -C 8 - 烷基,C 3 -C 10 - 环烷基或C 6 -C 10 - 芳基,R 1和R 2是相同或不同的 并且各自是C 1 -C 4 - 烷基,R 3至R 6相同或不同,并且各自为氢或C 1 -C 8 - 烷基,或两个相邻基团R 3和R 4以及R 5和R 6在每种情况下一起形成4〜 15个碳原子,n为0,1或2,以及b)通式II或III的开链或环状铝氧烷化合物,其中R 7为C 1 -C 4 - 烷基且n为5至30.新型催化剂体系 特别适用于制备具有高分子量的聚酮-1-烯。

    Dienes and liquid-crystalline media
    85.
    发明授权
    Dienes and liquid-crystalline media 失效
    二烯和液晶介质

    公开(公告)号:US5744058A

    公开(公告)日:1998-04-28

    申请号:US458704

    申请日:1995-06-02

    摘要: Dienes of the formula I ##STR1## in which n is 0, 1, 2, 3, 4 or 5, r is 1, 2 or 3, s is 1 or 2, ##STR2## is trans-1,4-cyclohexylene or trans-1,3-dioxane-2,5-diyl, ##STR3## is trans-1,4-cyclohexylene, trans-1,3-dioxane-2,5-diyl, unfluorinated or mono- or polyfluorinated 1,4-phenylene, in which one or two CH groups may also be replaced by N, or the central part ##STR4## Z is a single bond, a bridging member selected from the group consisting of --CH.sub.2 CH.sub.2 --, --CH.dbd.CH--, --C.tbd.C--, --CO--O--, --CH.sub.2 O--, --OCH.sub.2 -- and --O--CO--, or any desired combination of two such bridging members, where two O atoms are not linked directly to one another, and R is --CN, --NCS, halogen or an alkyl, alkenyl, alkoxy or alkenyloxy group, in each case having up to 12 carbon atoms and in each case unsubstituted or monosubstituted or polysubstituted by fluorine and/or chlorine.

    摘要翻译: 式I的二烯类,其中n为0,1,2,3,4或5,r为1,2或3,s为1或2,图像为反式-1,4-亚环己基 或反式-1,3-二恶烷-2,5-二基,图像是反式-1,4-亚环己基,反式-1,3-二恶烷-2,5-二基,未氟化或单氟化或多氟化1,4 - 亚苯基,其中一个或两个CH基团也可以被N取代,或者中心部分Z是单键,桥接成员选自-CH 2 CH 2 - , - CH = CH - , - C 3BOND C - , - CO-O - , - CH 2 O-,-OCH 2 - 和-O-CO-,或两个这样的桥连构件的任何所需组合,其中两个O原子不直接连接 并且R是-CN,-NCS,卤素或烷基,烯基,烷氧基或烯氧基,在每种情况下具有至多12个碳原子,并且在每种情况下都是未被取代或被氟和/或氯单取代或多取代的。

    Liquid-crystalline medium
    86.
    发明授权
    Liquid-crystalline medium 失效
    液晶介质

    公开(公告)号:US5616284A

    公开(公告)日:1997-04-01

    申请号:US453355

    申请日:1995-05-30

    IPC分类号: C09K19/30 C09K19/52 G02F1/13

    摘要: The invention relates to a liquid-crystalline medium based on a mixture of polar compounds of positive dielectric anisotropy, characterized in that it contains one or more compounds of the general formula I ##STR1## in which X is fluorine, chlorine, CF.sub.3, OCF.sub.3 or OCHF.sub.2, one of the radicals 1.sup.1 and 1.sup.2 is fluorine, the other radical 1.sup.1 or 1.sup.2 is hydrogen and R is alkyl, oxaalkyl, fluoroalkyl or alkenyl, in each case having up to 7 carbon atoms.

    摘要翻译: 本发明涉及一种基于正介电各向异性极性化合物的混合物的液晶介质,其特征在于其含有一种或多种通式I的化合物,其中X为氟,氯,CF 3,OCF 3 或OCHF 2,基团11和12之一是氟,另一个基团11或12是氢,R是烷基,氧杂烷基,氟烷基或烯基,在每种情况下具有至多7个碳原子。