Low temperature, polyphenylmethane-based dielectric compositions
    3.
    发明授权
    Low temperature, polyphenylmethane-based dielectric compositions 失效
    低温,聚苯基甲烷介电组合物

    公开(公告)号:US5192463A

    公开(公告)日:1993-03-09

    申请号:US750702

    申请日:1991-08-20

    IPC分类号: C07C2/86 C07C15/16

    CPC分类号: C07C15/16 C07C2/861

    摘要: Novel dielectric compositions, well adapted for low temperature applications, include admixture of benzyltoluene, benzylbenzene and the higher homologs thereof, and optionally contain triphenylmethane, ditolylphenylmethane, tolyldiphenylmethane and the higher homologs thereof; the subject novel compositions are prepared by chlorinating a mixture of toluene and benzene and then treating the product of reaction with an inorganic halide.

    摘要翻译: 适用于低温应用的新型电介质组合物包括苄基甲苯,苄基苯及其较高同系物的混合物,并且任选地含有三苯基甲烷,二甲苯基甲烷,对二苯基甲烷及其较高同系物; 通过氯化甲苯和苯的混合物然后用无机卤化物处理反应产物来制备主题新颖的组合物。

    Dielectrics comprising methyl/benzyl derivatives of diphenylmethane
    4.
    发明授权
    Dielectrics comprising methyl/benzyl derivatives of diphenylmethane 失效
    包含二苯基甲烷的甲基/苄基衍生物的介电体

    公开(公告)号:US5601755A

    公开(公告)日:1997-02-11

    申请号:US399998

    申请日:1995-03-06

    CPC分类号: H01B3/22 C07C15/16 C07C2/861

    摘要: Novel dielectric liquids for such electrical components as transformers, capacitors and cables, especially adopted for low temperature applications, comprise immixtures of benzyltoluene, (methylbenzyl)toluene, benzylxylene and (methylbenzyl)xylene, and optionally include the benzyl or methylbenzyl derivatives thereof; these immixtures are facilely prepared by chlorinating a mixture of xylene and toluene and then adding a catalytically effective amount of a Friedel-Crafts catalyst to the medium of chlorination.

    摘要翻译: 用于诸如变压器,电容器和电缆的电气部件的新型介电液体,特别适用于低温应用,包括苄基甲苯,(甲基苄基)甲苯,苄基二甲苯和(甲基苄基)二甲苯的混合物,并且任选地包括其苄基或甲基苄基衍生物; 通过将二甲苯和甲苯的混合物氯化,然后向氯化介质中加入催化有效量的Friedel-Crafts催化剂,容易地制备这些固体。

    Liquid composition containing diisocyanate of diphenylurethane
    6.
    发明授权
    Liquid composition containing diisocyanate of diphenylurethane 失效
    含二苯基氨基甲酸二异氰酸酯的液体组合物

    公开(公告)号:US4650899A

    公开(公告)日:1987-03-17

    申请号:US603964

    申请日:1984-04-26

    CPC分类号: C07C265/14 C08G18/7671

    摘要: A liquid composition comprising a mixture of isomers of essentially diisocyanates having the diphenylmethane structure, the distribution by weight of isomers in the composition for each 100 parts by weight of the composition being:32 to 55% of the 4,4' isomer,30 to 45% of the 2,4' isomer,5 to 12% of the 3,4' isomer,4 to 10% of the 2,2' isomer, and2 to 5% of the 2,3' isomer;and the method of making the composition by first reacting a benzyl halide with benzene, followed by nitration, hydrogenation, and phosgenation.

    摘要翻译: 一种液体组合物,其包含具有二苯基甲烷结构的基本上二异氰酸酯的异构体混合物,组合物中异构体的重量分别为每100重量份组合物为:32-55%的4,4'异构体,30至 2,4'异构体的45%,3,4'异构体的5〜12%,2,2'异构体的4〜10%,2,3'异构体的2〜5%。 以及首先使苄基卤与苯反应,然后进行硝化,氢化和光气化来制备组合物的方法。

    Dielectric composition based on polyarylalkanes which have improved
dielectric properties
    7.
    发明授权
    Dielectric composition based on polyarylalkanes which have improved dielectric properties 失效
    基于具有改善介电性能的聚芳基烷烃的介电组合物

    公开(公告)号:US5856598A

    公开(公告)日:1999-01-05

    申请号:US537394

    申请日:1995-10-02

    IPC分类号: C08L65/00 H01B3/22 C07C15/00

    CPC分类号: H01B3/442 H01B3/22

    摘要: The invention relates to a dielectric composition including at least one polyarylalkane oligomer of formula: ##STR1## in which n.sub.1 and n.sub.2 =0, 1 or 2, with the proviso that n.sub.1 +n.sub.2 =1 or 2, x=0, 1, 2, 3, 4, 5 or 6 and that the said composition has, in particular, a breakdown voltage increasing with the temperature.

    摘要翻译: 本发明涉及一种包含至少一种下式的其中n1和n2 = 0,1或2的聚芳基烷烃低聚物的介电组合物,条件是n1 + n2 = 1或2,x = 0, 1,2,3,4,5或6,并且所述组合物特别是具有随温度升高的击穿电压。

    Separation of isomers, e. g., phenethyl bromide from
1-phenyl-1-bromoethane
    10.
    发明授权
    Separation of isomers, e. g., phenethyl bromide from 1-phenyl-1-bromoethane 失效
    异构体的分离,E.G.,1-苯基-1-甲氧基苯乙烯的苯乙酰胺

    公开(公告)号:US5181992A

    公开(公告)日:1993-01-26

    申请号:US537926

    申请日:1990-06-13

    CPC分类号: C07C17/395 Y10S203/06

    摘要: Mixtures of isomers, e.g., mixtures of phenethyl bromide and 1-phenyl-1-bromoethane, are separated by (a) selectively condensing one such isomer with an aromatic compound bearing at least one aryl (nuclear) hydrogen atom, e.g., xylene, in the presence of a catalytically effective amount of a Friedel-Crafts catalyst, e.g., ferric chloride, and then (b) separating the product of condensation, e.g., phenylxylylethane, from the unreacted isomer.

    摘要翻译: 异构体的混合物,例如苯乙基溴和1-苯基-1-溴乙烷的混合物通过(a)选择性地将一种这样的异构体与带有至少一个芳基(核)氢原子的芳族化合物(例如二甲苯) 存在催化有效量的Friedel-Crafts催化剂,例如氯化铁,然后(b)从未反应的异构体中分离缩合产物,例如苯基二甲基乙烷。