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    Process for the preparation impact resistant styrene polymers
    2.
    发明授权
    Process for the preparation impact resistant styrene polymers 失效
    制备耐冲击苯乙烯聚合物的方法

    公开(公告)号：US3927142A

    公开(公告)日：1975-12-16

    申请号：US42597473

    申请日：1973-12-19

    Applicant: HOECHST AG

    Inventor： STROBEL WOLFGANG ,  JAENICKE OTTOKAR ,  SCHUDDEMAGE HORST-DIETER ,  JASTROW HORST

    IPC: C08F2/00 ,  C08F255/00 ,  C08F255/04 ,  C08F255/06 ,  C08L23/16

    CPC classification number: C08F255/06 ,  C08F212/04 ,  C08F210/14

    Abstract: An improved polymer and a process for the preparation of impact resistant styrene graft copolymers. Ethylene-propylenetercomponent-rubber is dissolved in styrene, then acrylonitrile is added to a styrene to acrylo-nitrile ratio of 6/1 to 4/1, the polymerization is carried out in the mass until the end of the phase transition, further acrylonitrile, and optionally further styrene, is added and the polymerization is completed in the mass or in suspension.

    Abstract translation: 改进的聚合物和制备耐冲击苯乙烯接枝共聚物的方法。 将乙烯 - 丙烯 - 三元橡胶溶解在苯乙烯中，然后将丙烯腈加入到苯乙烯中，以丙烯腈的比例为6/1〜4/1，聚合在质量上进行直到相变结束 丙烯腈和任选的其它苯乙烯，聚合在质量或悬浮液中完成。

    POLYETHYLENE MOLDING COMPOSITION
    4.
    发明专利
    POLYETHYLENE MOLDING COMPOSITION 未知

    公开(公告)号：CA2070470A1

    公开(公告)日：1992-12-06

    申请号：CA2070470

    申请日：1992-06-04

    Applicant: HOECHST AG

    Inventor： BOEHM LUDWIG ,  ENDERLE HANS-FRIEDER ,  JASTROW HORST

    IPC: C08L23/06 ,  C08L23/08

    Abstract: A polyethylene molding composition which consists of 50 to 80 % by weight of a HD polyethylene having a very broad bimodal molecular mass distribution and 20 to 50 % by weight of a chemical LLD polyethylene or LD poly- ethylene gives pipes, plates and sheets which have very good long-term and low-temperature characteristics.

    PROCESS FOR PREPARING IMPACT RESISTANT STYRENE POLYMERS
    6.
    发明专利
    PROCESS FOR PREPARING IMPACT RESISTANT STYRENE POLYMERS 未知

    公开(公告)号：CA1090499A

    公开(公告)日：1980-11-25

    申请号：CA230340

    申请日：1975-06-27

    Applicant: HOECHST AG

    Inventor： SCHUDDEMAGE HORST-DIETER ,  JASTROW HORST ,  BARTH HARRY

    IPC: C08F255/00 ,  B29C47/00 ,  C08F255/04 ,  C08F255/06 ,  C08J3/24

    Abstract: of the disclosure: There is disclosed a process for preparing impact resistant styrene graft copolymers having improved properties, especially a high gloss. They are obtained by polymerizing a solution of an EPTR in a mixture of styrene and acrylonitrile in one step (mass polymerization) or two steps (mass/ suspension polymerization) in the presence of an organic peroxide and submitting the polymer to a two step extrusion, the first step being carried out at temperatures of from 130 to 240.degree.C, the second step at temperatures of from 200 to 280.degree.C, and providing that during the second extrusion step a quantity of about 0.05 to about 0.5% by weight of the organic peroxide is still present.

    PROCESS FOR THE PREPARATION OF FOAMABLE STYRENE POLYMERS
    7.
    发明专利
    PROCESS FOR THE PREPARATION OF FOAMABLE STYRENE POLYMERS 未知

    公开(公告)号：CA977100A

    公开(公告)日：1975-10-28

    申请号：CA127606

    申请日：1971-11-15

    Applicant: HOECHST AG

    Inventor： JASTROW HORST ,  LEDERER MICHAEL ,  HEISKEL ELMAR

    IPC: C08F271/00 ,  C08F283/12 ,  C08J9/20

    Abstract: 1334150 Preparation of foamable styrene polymer beads by suspension polymerization FARBWERKE HOECHST AG 15 Nov 1971 [16 Nov 1970] 52950/71 Headings C3P and C3C In a process for the production of foamable styrene polymer beads by suspension polymerizing styrene with or without up to 10% by weight of an alkyl styrene or nuclear halogenated styrene or up to 10% by weight of an acrylic or methacrylic acid ester, acrylonitrile, vinyl chloride, a vinyl ester or a vinyl polysiloxane, in the presence of a blowing agent, the protective colloid for the suspension is 0À02-0À08% by wt. based on the total monomer, of a copolymer of 98-99À5% by wt. of an N-vinyl-N- alkyl acetamide in which the alkyl is C 1-4 , and from 2-0À5% by wt. of a C 6-18 aliphaticalcohol ester of acrylic, methacrylic, maleic, or fumaric acid, said copolymer having a Fickentscher K value of 70-120, measured as a 1% methanol solution at 20‹ C. The preferred protective colloid is a copolymer of N-vinyl-N- methyl acetamide and 2-ethylhexyl acrylate. Other suitable comonomers for the N-vinyl-N- alkylacetamide are n-hexyl acrylate, decyl methacrylate, dodecyl maleate and stearyl fumarate. Blowing agents specified are npentane, isopentane, cyclopentane, hexane, petroleum ether, and halogenated hydrocarbons such as CFCl 3 , CF 2 Cl 2 , CH 3 Cl, and CH 2 Cl 2 . Nucleating agents for pore regulation may also be present, such as hexabromocyclododecane, tetrabromobutane, tris(dibromopropylphosphate), brominated butadiene oligomers and chlorine compounds such as chloro-paraffins and P.V.C., and polysiloxanes. The initiators used are conventional. Other additives such as flame retarders, plasticizers &c. may also be present. The blowing agent may be added before or during polymerization.

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