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    Thermoplastic resin composition
    4.
    发明授权
    Thermoplastic resin composition 失效

    公开(公告)号：US4990559A

    公开(公告)日：1991-02-05

    申请号：US479288

    申请日：1990-02-13

    申请人： Takeshi Shiraki ,  Kunie Hiroshige ,  Iwatosi Suzuki

    发明人： Takeshi Shiraki ,  Kunie Hiroshige ,  Iwatosi Suzuki

    IPC分类号： C08L23/06 ,  C08L65/00

    CPC分类号： C08L23/06 ,  C08L23/0815 ,  C08L23/0823 ,  C08L65/00 ,  C08L2205/02 ,  C08L2205/03 ,  C08L2314/02

    摘要： A thermoplastic resin composition composed of[A] 5 to 90% by weight of a linear polyolefin having an intrinsic viscosity [.mu.], measured in decalin at 135.degree. C., of 1.0 to 15.0 and a crystallinity of at least 45% and formed substantially of from 8 to 40% of an ultrahigh-molecular-weight polyolefin having an intrinsic viscosity [.mu.], determined at 135.degree. C., of 10 to 40 dl/g and 60 to 92% of a low-molecular-weight to high-molecular-weight polyolefin having an intrinsic viscosity [.mu.], measured in decalin at 135.degree. C., of 0.1 to 5.0 dl/g, and[B] 95 to 10% by weight of at least one type of cyclo-olefin resin having an intrinsic viscosity, measured in decalin at 135.degree. C., of 0.05 to 10 dl/g and a softening temperature of at least 70.degree. C. and selected from ring-opened polymers and ring-opened copolymers derived from cyclo-olefins represented by the following formula [I], ##STR1## wherein n is 0 or a positive integer, R.sup.1 to R.sup.12, independently from each other, represent an atom or a group selected from the class consisting of a hydrogen atom, halogen atoms and hydrocarbon groups, R.sup.9 to R.sup.12 may be linked to each other to form a monocyclic or polycyclic group which may have a double bond, and R.sup.9 and R.sup.11, or R.sup.10 and R.sup.12, may each form an alkylidene group,hydrogenated products of said polymers or copolymers, and addition polymers of ethylene with the cyclo-olefins of formula [I]. The composition is suitable for obtaining molded articles having self-lubricating property, molding dimensional stability, heat resistance and rigidity in a well-balanced combination.