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    1.
    发明专利
    未知

    公开(公告)号：AT7506T

    公开(公告)日：1984-06-15

    申请号：AT81200693

    申请日：1981-06-19

    Applicant: STAMICARBON B.V.

    Inventor： VAN DER LOOS, JOZEF LAMBERTUS MARIA ,  TIJSSEN, JAN

    IPC: C08L55/00 ,  C08L7/00 ,  C08L21/00 ,  C08L23/00 ,  C08L25/00 ,  C08L25/16 ,  C08L33/00 ,  C08L33/02 ,  C08L51/00 ,  C08L51/02 ,  C08L51/04 ,  C08L55/02 ,  C08L101/00

    Abstract: The invention relates to a heat resistant polymer composition based on one or more graft copolymers of styrene and acrylonitrile on a rubber and a copolymer of alpha -methylstyrene and acrylonitrile. This composition comprises: A. A graft copolymer obtained by polymerizing 50-80 parts by weight of a monomer mixture consisting of 20-40% by weight of acrylonitrile, 50-80% by weight of styrene and 0-30% by weight of one or more other monomers in the presence of 20-50 parts by weight of rubber (in respect of 100 parts by weight of graft copolymer) and B. a copolymer of alpha -methylstyrene and acrylonitrile obtained by polymerizing a mixture of 60-80 parts by weight of alpha -methylstyrene and 20-40 parts by weight of acrylonitrile, of which copolymer the spiral flow length (S) is at least 65 and the flow index (V) 45 at most, and the ratio between spiral flow length and the flow index is at least 3.0, and in which polymer composition 35 to 80% by weight of copolymer of alpha -methylstyrene and acrylonitrile is present.

    2.
    发明专利
    未知

    公开(公告)号：AT7147T

    公开(公告)日：1984-05-15

    申请号：AT81200040

    申请日：1981-01-14

    Applicant: STAMICARBON B.V.

    Inventor： DUYZINGS, WILHELMUS GERARDUS ,  VAN DER LOOS, JOZEF LAMBERTUS ,  TIJSSEN, JAN

    IPC: C08F6/00 ,  C08F6/06 ,  C08F6/22 ,  C08F212/08

    Abstract: The invention relates to an improved process for the preparation of copolymers of alpha -methylstyrene and other co-monomers such as acrylonitrile, styrene, methyl methacrylate and the like. In this process a substantially water-immiscible softener is employed, particularly prior to coagulation of the latex formed of the copolymer, whereby and improved product of higher bulk density and easier to employ in a subsequent processing is obtained.

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