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    • 10. 发明授权
    • Liquid-crystalline polymers of virtually uniform molecular weight
    • 几乎均匀分子量的液晶聚合物
    • US5332520A
    • 1994-07-26
    • US880578
    • 1992-05-08
    • Volker BachKarl-Heinz EtzbachKarl Siemensmeyer
    • Volker BachKarl-Heinz EtzbachKarl Siemensmeyer
    • C08F20/02C08F20/10C08F20/12C08F20/30C09K19/38G02F1/13C09K19/52C08F22/10G11B7/24
    • C09K19/3857C08F20/30
    • A liquid-crystalline polymer of virtually uniform molecular weight, obtainable by polymerizing identical or different monomers of the formula I ##STR1## where R is hydrogen, chlorine or methyl,A is a flexible, long-chain moiety which acts as a spacer, is a mesogenic moiety built up from at least two aromatic rings which are linked to one another in a linear or approximately linear manner, andC is an optically active, chiral moiety,in from 0.01 to 0.1 molar solution in an inert organic solvent in the presence of from 1 to 40 mol %, based on the monomers, of a free-radical initiator, at from 40.degree. to 60.degree. C. for from 100 to 140 hours, and subsequently isolating the polymerization product from the reaction mixture, and the use thereof for building up recording layers for laser-optical and electrical recording elements and for electrophotography and for building up liquid-crystalline display elements.
    • 通过聚合相同或不同的式I的单体得到的具有实质上均匀分子量的液晶聚合物,其中R是氢,氯或甲基,A是作为间隔基的柔性长链部分, 是由至少两个芳族环构成的介晶部分,其以线性或近似线性的方式彼此连接,C是光学活性的手性部分,在惰性有机溶剂中的0.01至0.1摩尔溶液 在40至60℃下,在100至140小时内,以单体为基础,存在1至40摩尔%的自由基引发剂,随后从反应混合物中分离出聚合产物, 其用于建立用于激光光学和电气记录元件的记录层和用于电子照相和用于构建液晶显示元件。