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    CONTINUOUS PREPARATION OF RUBBER-MODIFIED POLYMERS OF VINYL-AROMATICS USING A PER-ESTER OR DIACYL PEROXIDE INITIATOR
    12.
    发明专利
    CONTINUOUS PREPARATION OF RUBBER-MODIFIED POLYMERS OF VINYL-AROMATICS USING A PER-ESTER OR DIACYL PEROXIDE INITIATOR 未知

    公开(公告)号：CA1175592A

    公开(公告)日：1984-10-02

    申请号：CA383857

    申请日：1981-08-13

    Applicant: BASF AG

    Inventor： JENNE HELMUT ,  GAUSEPOHL HERMANN ,  MITTNACHT HANS

    IPC: C08F279/02 ,  C08F4/34 ,  C08F253/00

    Abstract: A process for the continuous preparation of rubber-modified polymers of vinylaromatics, wherein a mixture which contains a monomeric aromatic vinyl compound and an elastomeric polymer synthesized predominantly from 1,3-dienes is reacted in the presence of from 0.5 x 10-2 to 5 x 10-2 mole %, based on monomer, of a per-ester or diacyl peroxide as the free radical initiator and of a mercaptan as a chain transfer agent, the molar ratio of free radical initiator to chain transfer agent being from 3.4 to 0.1. The reaction takes place at an elevated temperature, in two or more process stages, under conditions such that the intrinsic viscosity (determined in 0.5% strength by weight solution in toluene at 23.degree.C) of the matrix-forming polymer, produced from the vinyl-aromatic monomer, is from 65 to 45 ml/g. The polymer obtained is freed from vinyl-aromatic monomer and from solvent, is any, in a devolatilization zone and is used for the production of injection moldings.

    TRANSPARENT POLYMER MIXTURES HAVING HIGH IMPACT STRENGTH
    13.
    发明专利
    TRANSPARENT POLYMER MIXTURES HAVING HIGH IMPACT STRENGTH 未知

    公开(公告)号：CA1087340A

    公开(公告)日：1980-10-07

    申请号：CA272390

    申请日：1977-02-21

    Applicant: BASF AG

    Inventor： FAHRBACH GERHARD ,  GERBERDING KARL ,  MITTNACHT HANS ,  SEILER ERHARD ,  STEIN DIETER

    IPC: C08L25/06 ,  C08L53/02

    Abstract: Mixtures of polystyrene and a block copolymer of a monovinyl-aromatic compound and a conjugated diene. The mixture contains a thermoplastic, non-elastomeric block copolymer having a star-shaped branched structure, the branches being of at least two types of different average composition, and at least 50% by weight of the monovinyl-aromatic compound being present as terminal polymer blocks in one or more of the branches. The mixtures, which exhibit good transparency and high impact strength, are particularly suitable for the manufacture of moldings and packaging materials.

    17.
    发明专利
    未知

    公开(公告)号：NO803491L

    公开(公告)日：1981-05-21

    申请号：NO803491

    申请日：1980-11-19

    Applicant: BASF AG

    Inventor： ECHTE ADOLF ,  GAUSEPOHL HERMANN ,  JENNE HELMUT ,  MITTNACHT HANS

    IPC: C08F212/06 ,  C08F255/06 ,  C08F279/02 ,  C08F

    Abstract: Thermoplastic molding materials which contain a copolymer which has been made impact-resistant with a rubber. The copolymer is produced by polymerizing a mixture of a monovinyl-aromatic compound and an acrylic acid derivative or methacrylic acid derivative in the presence of a rubber. The folding materials contain a specific proportion of soft component. The diameter of the particles of the soft component, and the swelling index of the soft component, lie within a specific range, and the tensile strength of the molding material is higher than the yield strength.

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