Low melting mesophase pitches
    1.
    发明授权
    Low melting mesophase pitches 失效
    低熔点中间相沥青

    公开(公告)号:US4443324A

    公开(公告)日:1984-04-17

    申请号:US388479

    申请日:1982-06-14

    CPC分类号: C10C1/00 C10C3/00 D01F9/145

    摘要: A low melting point, low molecular weight, heptane insoluble, 1,2,4-trichlorobenzene soluble mesophase pitch useful in carbon fiber spinning as such or as a plasticizer in a carbon fiber spinning composition is obtained by heating chrysene, triphenylene or paraterphenyl as well as mixtures thereof and hydrocarbon fractions containing the same, dissolving the resulting heat treated material with 1,2,4-trichlorobenzene, and separating the insolubles, and then contacting the 1,2,4-trichlorobenzene soluble fraction with a sufficient amount of heptane to precipitate the low melting point, low molecular weight mesophase pitch.

    摘要翻译: 通过对碳纤维纺丝组合物中的碳纤维纺丝或增塑剂可用的低熔点,低分子量,庚烷不溶性,1,2,4-三氯苯可溶中间相沥青也可通过加热三苯乙烯或对甲苯基苯 作为其混合物和含有它们的烃馏分,将所得热处理材料与1,2,4-三氯苯溶解,分离不溶物,然后使1,2,4-三氯苯可溶部分与足量的庚烷接触 沉淀低熔点,低分子量中间相沥青。

    Forming optically anisotropic pitches
    2.
    发明授权
    Forming optically anisotropic pitches 失效
    形成光学各向异性间距

    公开(公告)号:US4208267A

    公开(公告)日:1980-06-17

    申请号:US903172

    申请日:1978-05-05

    IPC分类号: C10C3/00 D01F9/145 C10C3/08

    CPC分类号: C10C3/00 D01F9/145

    摘要: An improved process for preparing liquid-crystal containing pitches comprises extracting carbonaceous isotropic pitches with an organic solvent system to provide a solvent insoluble fraction which when heated for 10 minutes or less and to temperatures in the range of about 230.degree. C. to 400.degree. C. will upon polarized light microscopy examination of cooled samples display greater than 75% of an optically anisotropic phase.

    摘要翻译: 用于制备含液晶的间距的改进方法包括用有机溶剂系统萃取碳质各向同性沥青,以提供溶剂不溶性级分,当加热10分钟或更低时,温度在约230℃至400℃ 将在偏光显微镜下检查冷却样品显示大于75%的光学各向异性相。