Substrate composed of at least one cycloolefin copolymer for recording
media and process for producing it
    4.
    发明授权
    Substrate composed of at least one cycloolefin copolymer for recording media and process for producing it 失效
    由至少一种用于记录介质的环烯烃共聚物构成的基材及其制造方法

    公开(公告)号:US5439722A

    公开(公告)日:1995-08-08

    申请号:US131945

    申请日:1993-10-08

    摘要: As starting materials for substrates for optical storage disks, cycloolefin copolymers (COC) are produced by a polymerization process in which the polymerization is terminated at a point in time at which the molar-mass distribution M.sub.w /M.sub.n is 15,000 g/mol and M.sub.w /M.sub.n less than/equal to 4 and greater than/equal to 2. The substrate is produced by thermal deformation either of a single COC having a molar-mass distribution M.sub.w /M.sub.n of

    摘要翻译: 作为光存储盘基材的原料,通过聚合方法制备环烯烃共聚物(COC),其中聚合在摩尔质量分布Mw / Mn <2.0的时间点终止,或COC共混物为 由Mw <30,000g / mol,Mw / Mn <2,优选<2的第一成分和Mw> 15,000g / mol的Mw / Mn小于等于4的第二成分和 大于/等于2.通过热变形产生基体,其中,单一COC的摩尔质量分布Mw / Mn为<2,或由这样的COC组成的共混物和一种或多种具有摩尔质量的COC 分布为2