Optical disk substrate
    3.
    发明授权
    Optical disk substrate 失效
    光盘基板

    公开(公告)号:US4812345A

    公开(公告)日:1989-03-14

    申请号:US155109

    申请日:1988-02-11

    CPC分类号: G11B7/253 Y10S430/146

    摘要: There is disclosed herein an optical disk substrate comprising a copolymer produced by polymerizing 50 to 65% by weight of methyl methacrylate (a) units, 20 to 35% by weight of tricyclo[5.2.1.0.sup.2.6 ]deca-8-yl methacrylate (b) units, 5 to 25% by weight of cyclohexyl methacrylate (c) units and 1 to 5% by weight of acrylic ester (d) units.

    摘要翻译: 这里公开了一种光盘基片,其包括通过聚合50-65重量%的甲基丙烯酸甲酯(a)单元,20-35重量%的三环[5.2.1.02.6]癸基-8-基甲基丙烯酸酯( b)单元,5至25重量%的甲基丙烯酸环己酯(c)单元和1至5重量%的丙烯酸酯(d)单元。

    Process for producing polyphenylene oxide
    4.
    发明授权
    Process for producing polyphenylene oxide 失效
    生产聚苯醚的方法

    公开(公告)号:US4385168A

    公开(公告)日:1983-05-24

    申请号:US353105

    申请日:1982-03-01

    IPC分类号: C08G65/44 C08L71/12 C08G65/38

    CPC分类号: C08G65/44 C08L71/123

    摘要: A process for producing polyphenylene oxide which comprises contacting a phenolic monomer with oxygen in the presence of a catalyst composed of a manganese (II) salt and an ortho-hydroxyazo compound represented by the following formula: ##STR1## wherein A and B represent identical or different arylene ring having a valency of at least 2 and having an oxy group and an azo group directly linked to the ortho carbon atoms of the arylene ring and R represents hydrogen or lower alkyl group, or in the presence of said catalyst and an amine, in a polymerization solvent containing a base and thereby subjecting said phenolic monomer to an oxidative polymerization.

    摘要翻译: 一种生产聚苯醚的方法,其包括在由锰(II)盐和由下式表示的邻羟基偶氮化合物组成的催化剂存在下使酚单体与氧接触:其中A和B表示相同或 不同的亚芳基环具有至少为2的化合价,并且具有氧基和与亚芳基环的邻碳原子直接连接的偶氮基,R表示氢或低级烷基,或者在所述催化剂和胺的存在下, 在含有碱的聚合溶剂中,从而使所述酚类单体进行氧化聚合。