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    • 3. 发明授权
    • Mesophase pitch for use in the making of carbon materials
    • 用于制造碳材料的中间相沥青
    • US5182010A
    • 1993-01-26
    • US736561
    • 1991-07-26
    • Isao MochidaYukio SakaiHiroyuki Ohtsuka
    • Isao MochidaYukio SakaiHiroyuki Ohtsuka
    • C10C3/00D01F9/15D01F9/155
    • D01F9/15C10C3/00D01F9/155
    • Pitch that is obtained from naphthalene derivatives having at least one methyl group and the content of an optically anisotropic phase in which is substantially 100% is disclosed. This mesophase pitch has a H/C atomic ratio of about 0.5-1.0 and an aromatic carbon ratio (fa) of at least about 0.7, contains methylic carbon in an amount of at least about 4% of the total carbon atoms, and has a softening point of 200.degree.-250.degree. C. The pitch contains about 12-20 mole % of molecules having an average molecular weight of less than about 600, about 55-70 mole % of molecules having an average molecular weight of from about 600-1,500 and about 20-30 mole % of molecules having an average molecular weight of higher than about 1,500. Fibers melt spun from this mesophase pitch can be converted to carbon or graphite fibers having high strength and modulus of elasticity by a heat treatment which consists of heating to a temperature of 200.degree.-350.degree. C. in an air atmosphere, then heating to about 1,000.degree. C. or higher in an inert gas atmosphere. Such mesophase pitch is produced by polymerizing a naphthalene derivative having at least one methyl group for about 5-300 minutes at a temperature of about 180.degree.-400.degree. C. and at a pressure of about 5-100 atmosphere in the presence of about 0.1-20 moles of HF and about 0.05-1.0 mole of BF.sub.3 per mole of the naphthalene derivative.
    • 公开了由具有至少一个甲基的萘衍生物和基本上为100%的光学各向异性相的含量获得的间距。 该中间相沥青具有约0.5-1.0的H / C原子比和至少约0.7的芳族碳比(fa),含有至少约占总碳原子的约4%的甲基碳,并且具有 软化点为200°-250℃。沥青含有约12-20摩尔%的平均分子量小于约600的分子,约55-70摩尔%的平均分子量为约600〜 1,500和约20-30摩尔%的平均分子量高于约1,500的分子。 从该中间相沥青熔融纺丝的纤维可以通过热处理转化为具有高强度和弹性模量的碳或石墨纤维,该热处理包括在空气气氛中加热至200-350℃的温度,然后加热至约 在惰性气体气氛中为1000℃以上。 这样的中间相沥青通过在约180-400℃的温度和约5-100个气压的压力下在约0.1的存在下将具有至少一个甲基的萘衍生物聚合约5-300分钟来制备 -20摩尔HF和约0.05-1.0摩尔BF 3 /摩尔萘衍生物。
    • 5. 发明授权
    • Process for producing carbon fiber reinforced carbon materials
    • 碳纤维增强碳材料生产工艺
    • US5205888A
    • 1993-04-27
    • US724892
    • 1991-07-02
    • Isao MochidaRyuji Fujiura
    • Isao MochidaRyuji Fujiura
    • C04B35/83
    • C04B35/83
    • A process for making carbon fiber reinforced materials which not only have desirable qualities which include high strength, high heat resistance, chemical resistance, wear resistance and lightweightness but also which are produced in a short time and at low cost. The process includes the steps of impregnating a carbon fiber assembly with a melt of mesophase pitch or mixing short carbon fibers with the mesophase pitch, shaping the pitch-impregnated assembly or the pitch/short carbon fiber mixture, and firing the same. The process requires that the mesophase pitch used in the process be almost 100% of an optical anistropic phase as examined under a polarizing microscope; have a softening point of no higher than 350.degree. C. and be capable of being carbonized in a yield of at least 70% when gradually heated to a temperature of about 600.degree. C. in an inert gas atmosphere and then held at that temperature for two hours.
    • 一种制造碳纤维增强材料的方法,其不仅具有包括高强度,高耐热性,耐化学性,耐磨性和轻质性,而且在短时间和低成本下生产的所需质量。 该方法包括以下步骤:用中间相沥青的熔体浸渍碳纤维组合物或将短碳纤维与中间相沥青混合,对沥青浸渍的组合物或沥青/短碳纤维混合物进行成型,并对其进行烧制。 该方法要求在该过程中使用的中间相沥青几乎是在偏光显微镜下检查的光学相位相的100%; 软化点不高于350℃,并且在惰性气体气氛中逐渐加热至约600℃的温度时能够以至少70%的产率碳化,然后在该温度下保持 两个小时