45.
    发明专利
    未知

    公开(公告)号:DE19734176A1

    公开(公告)日:1999-02-11

    申请号:DE19734176

    申请日:1997-08-07

    Applicant: BASF AG

    Abstract: A process is disclosed for preparing halogen-free, reactive polyisobutylene with a content of terminal double bonds of more than 50 % by moles and an average molecular weight Mn of 500 to 5000 daltons by cationic polymerisation of isobutylene or isobutylene-containing hydrocarbon mixtures in the liquid phase. Polymerisation is carried out at a temperature of between -40 and +10 DEG C in the presence of a molybdate or wolframate heteropolyacid.

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