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    6.
    发明专利
    未知

    公开(公告)号：DE1805635A1

    公开(公告)日：1971-06-16

    申请号：DE1805635

    申请日：1968-10-26

    Applicant: BASF AG

    Inventor： GROPPER HANS DR ,  GEORG DR MIETZNER FRANZ ,  KINKEL KLAUS DR ,  URBAN FRIEDRICH DR

    IPC: C08F2/00 ,  C08F10/00 ,  C08F1/60

    Abstract: 1276713 Polymerizing ethylene BADISCHE ANILIN- & SODA-FABRIK AG 24 Oct 1969 [26 Oct 1968] 52135/69 Heading C3P Ethylene homopolymers are prepared by polymerizing ethylene at 1000 to 7000 atmospheres and 200‹ to 400‹ C. with an initiator comprising a mixture of (a) 2 to 50 mole p.p.m. of oxygen and (b) 0À5 to 30 mole p.p.m. of a 2-hydroperoxy-2-isopropylphenyl propane. Polymerization may be effected continuously in tubular reactions, optionally in the presence of regulators such as hydrogen, ketones, alcohols and ethers. An example describes the polymerization of ethylene in the presence of oxygen, 2-hydroperoxy-2-p-isopropylphenyl propane and acetone. The products may be made into films.

    8.
    发明专利
    未知

    公开(公告)号：DE1770295A1

    公开(公告)日：1972-02-03

    申请号：DE1770295

    申请日：1968-04-27

    Applicant: BASF AG

    Inventor： LEHNERER WOLFGANG DR ,  GUETERBOCK HERMANN DR ,  KINKEL KLAUS DR

    IPC: B29C47/80 ,  B29C48/395 ,  B29C48/67 ,  B29C48/76 ,  C08F27/28

    Abstract: 1,257,042. Extruding polyisobutylene. BADISCHE ANILIN- & SODA-FABRIK A.G. 25 April, 1969 [27 April, 1968], No. 21161/69. Heading B5A. [Also in Divisions B1-B2 and C3] A screw extruder comprises a barrel 8 and a screw 7 rotatable in the barrel, the screw 7 comprising a series of alternating threaded and unthreaded sections in zones 1a, 1b, 2a, 2b, 3a, 3b, the distance between the section in zone 1b and the barrel being from 1¢-4 times the distance between the section in zone 2b and the barrel, and the diameter of the section in zone 3b being less than that of the section in zone 2b. The barrel may be provided with heating and cooling zones (not shown) and a degassing zone 5. The screw may be provided with threaded sections in zones 4, 6 before andafter the threaded section in the degassing zone. An extruder head 10 including a die is located at the end of the barrel. Material to be degraded, e.g. high M.W. polyisobutylene, is fed into the barrel from hopper 9. The profile of the unthreaded section in zone 1b may be frusto-conical as shown or cylindrical.

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