Homogeneous .alpha.-olefin dimerization catalysts
    64.
    发明授权
    Homogeneous .alpha.-olefin dimerization catalysts 失效
    均相α-烯烃二聚催化剂

    公开(公告)号:US5500398A

    公开(公告)日:1996-03-19

    申请号:US336864

    申请日:1994-11-09

    Abstract: A new class of olefin dimerization catalysts and an efficient method for their preparation is disclosed. B(C.sub.6 F.sub.5).sub.3 reacts quantitatively with Group 4 metallocene type catalysts to yield highly reactive cationic complexes as follows:(L.sub.2 MR.sup.2).sup.+ X.sup.- whereL=R.sub.2 (C.sub.5 H.sub.3); R=a C.sub.3 -C.sub.20 tert-alkyl group; R.sup.2 =a C.sub.1 -C.sub.20 alkyl group, HM=Ti, Zr, Hf;X.sup.- =RB(C.sub.5 F.sub.3).sup.-.sub.3, or methylalumoxane, where R"=a C.sub.1 -C.sub.20 alkyl group, H.These complexes are potent catalysts and may be used in the dimerization of .alpha.-olefins.

    Abstract translation: 公开了一类新的烯烃二聚催化剂及其制备方法。 B(C6F5)3与第4族金属茂型催化剂定量反应,得到高反应性阳离子络合物如下:(L2MR2)+ X-,其中L = R2(C5H3); R = C 3 -C 20叔烷基; R2 = C1-C20烷基,H M = Ti,Zr,Hf; X = RB(C5F3)-3或甲基铝氧烷,其中R“= C1-C20烷基,H.这些络合物是有效的催化剂,可用于α-烯烃的二聚。

    Self-assembled super lattices
    67.
    发明授权
    Self-assembled super lattices 失效
    自组装超级板

    公开(公告)号:US5156918A

    公开(公告)日:1992-10-20

    申请号:US676992

    申请日:1991-03-28

    Abstract: Polymer-based second harmonic generation materials are disclosed, including electric field poled, chromophore-functionalized polyphenylene ethers with second harmonic coefficients (d.sub.33) as high as 65.times.10.sup.-9 esu, Tg.apprxeq.173.degree. C., and with superior temporal stability of the poling-induced chromophore orientation. Procedures for simultaneously poling and diepoxide cross-linking chromophore-functionalized poly(.rho.-hydroxystyrene) are set forth, resulting in a significant improvement in the temporal stability of chromophore orientation. Chromophore immobilization is disclosed involving highly cross-linkable epoxy matrices. In a first procedure chromophore molecules are embedded in a matrix which can be simultaneously poled and thermally cured. In a second procedure, a functionalized high-.beta. chromophore is synthesized for use as an epoxy matrix component.

    Abstract translation: 公开了基于聚合物的二次谐波发生材料,其包括具有高达65×10 -9 esu的二次谐波系数(d33)的电场极化,发色团官能化聚苯醚,Tg约为173℃,并且具有优异的极化时间稳定性 诱导发色团取向。 阐述了同时极化和双环氧化物交联发色团官能化的聚(对羟基苯乙烯)的方法,导致发色团取向的时间稳定性的显着改善。 公开涉及高度可交联的环氧基质的发色团固定化。 在第一步骤中,发色团分子嵌入基质中,其可以同时极化并热固化。 在第二程序中,合成功能化的高β发色团用作环氧基质组分。

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