4.
    发明专利
    未知

    公开(公告)号:DE50005445D1

    公开(公告)日:2004-04-01

    申请号:DE50005445

    申请日:2000-08-25

    Applicant: BASF AG

    Abstract: The invention relates to an apparatus for transporting polymer dispersions, said apparatus being capable of being driven by a drive and being designed as an impeller ( 28 ). It is possible for said impeller both to be surrounded by a housing and to protrude freely into the polymer dispersion contained in the reactor tank. A number of vanes ( 2 ) are mounted in the region of the hub ( 1 ) of the impeller ( 28 ) in such a way that pumping spaces ( 5, 25 ) on the front side ( 7 ) and rear side ( 8 ) of the impeller ( 28 ) are flowed through uniformly.

    6.
    发明专利
    未知

    公开(公告)号:DE10148511A1

    公开(公告)日:2003-04-10

    申请号:DE10148511

    申请日:2001-10-01

    Applicant: BASF AG

    Abstract: The invention relates to a method for producing an aqueous styrene-butadiene polymer dispersion by means of radical aqueous emulsion polymerisation of a monomer mixture M containing styrene, butadiene, and optionally up to 30 wt. %, in relation to 100 wt. % of monomers, of ethylenically unsaturated comonomers other than styrene and butadiene. The reaction is carried out in a polymerisation vessel according to a monomer supply method, in the presence of a regulator system comprising, in relation to 100 wt. % of monomers, between 0.02 and 0.5 wt. % of at least one hydrocarbon KW having between 6 and 20 C atoms and being selected from compounds forming a pentadienyl radical or a 1-phenylallyl radical by means of abstraction of a hydrocarbon atom, an alpha -methylstyrene dimer, and between 0.3 and 2 wt. % of an organic compound S with at least one SH group. The inventive method is characterised in that at least 30 %, preferably at least 50 %, especially at least 80 %, and ideally the entire amount (or more than 95 %) of the hydrocarbon KW is present in the polymerisation vessel.

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