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    23.
    发明专利
    未知

    公开(公告)号：DE1669713A1

    公开(公告)日：1971-03-25

    申请号：DE1669713

    申请日：1967-08-16

    Applicant: BASF AG

    Inventor： GAETH RUDOLF DR ,  PFANNMUELLER HELMUT DR ,  STASTNY FRITZ DR ,  TRIESCHMANN HANS-GEORG PROF DR ,  TATZEL HERMANN ,  ZIZLSPERGER JOHANN DR

    IPC: C08G18/62 ,  C08J9/00 ,  C08F47/10

    Abstract: 1,227,454. Expanded ethylene/ester copolymers. BADISCHE ANILIN- & SODAFABRIK A.G. 15 Aug., 1968 [16 Aug., 1967], No. 39077/68. Headings C3C and C3P. A cross-linked expanded polymer is produced by mixing, e.g. in an extruder, a thermoplastic copolymer of ethylene with a vinyl ester of a saturated acid or an ester-of an ethylenically unsaturated acid in the plastic condition with a polyisocyanate and an expanding agent under such pressure that the copolymer is not expanded followed by decompression to allow expansion. The ethylene copolymer may contain units derived from vinyl acetate or acrylic acid and n-hexyl, ethyl or n- or tert-butyl acrylate. The polyisocyanate may be 4,4 1 - dicyclohexylmethane di-isocyanate or its 3,3 1 - dimethyl derivative; others are also exemplified. The expanding agent may be a mixture of iso- and n-butane and/or dichlorodifluoromethane, propane or neopentane or azodicarbonamide or p,p 1 - oxybenzene - sulphohydrazide. Talc may be used as a nucleating agent. The copolymer mixture may also contain polybutene, polyisobutylene or polypropylene and zinc oxide.

    24.
    发明专利
    未知

    公开(公告)号：DE1720296A1

    公开(公告)日：1974-05-30

    申请号：DE1720296

    申请日：1967-08-29

    Applicant: BASF AG

    Inventor： TRIESCHMANN HANS-GEORG PROF DR ,  ZEITLER GERHARD DR ,  REUTER LOTHAR ,  DICKHAEUSER HEINER DR ,  PFANNMUELLER HELMUT DR

    IPC: C08F8/20 ,  C08F27/03

    Abstract: 1,228,976. Chlorinating polyethylene. BADISCHE ANILIN- & SODA-FABRIK A.G. 28 Aug., 1968 [29 Aug., 1967], No. 41122/68. Heading C3P. Polyethylene is chlorinated in a continuous process in which finely particled polyethylene is treated with chlorine in a chlorohydrocarbon whose boiling point is in the range from 30‹ to 90‹ C., the process comprising continuously introducing a high pressure polyethylene in the form of particles having a diameter of from 2 to 6 mm., a chlorohydrocarbon and chlorine into a reaction zone which contains solid polyethylene and a solution of from 1 to 20% by weight with respect to the solution of chlorinated polyethylene in the chlorohydrocarbon, continuously withdrawing from the reaction zone a fraction of the solution which is equivalent in amount to the amount of constituents being continuously introduced, and isolating chlorinated polyethylene from the solution withdrawn. Suitable chlorohydrocarbons are carbon tetrachloride, chloroform and trichloroethane.

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