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    METHOD FOR PRODUCING AQUEOUS STYRENE-BUTADIENE POLYMER DISPERSIONS III
    23.
    发明专利
    METHOD FOR PRODUCING AQUEOUS STYRENE-BUTADIENE POLYMER DISPERSIONS III 未知

    公开(公告)号：CA2461947A1

    公开(公告)日：2003-04-10

    申请号：CA2461947

    申请日：2002-09-30

    Applicant: BASF AG

    Inventor： SCHAEDLER VOLKER ,  GASCHLER WOLFGANG ,  MANDERS LAMBERTUS ,  KROENER HUBERTUS ,  WIRTH THOMAS

    IPC: C08F2/22 ,  C08F2/38 ,  C08F212/00 ,  C08F212/08 ,  C08F236/00 ,  C08F236/10 ,  C08F291/00 ,  C08F236/06

    Abstract: The invention relates to a method for producing an aqueous styrene-butadiene polymer dispersion by the radical aqueous emulsion-polymerisation of a monom er mixture M, containing: between 40 and 80 wt. % styrene as monomer M1; betwee n 20 and 60 wt. % butadiene as monomer M2 and between 0 and 40 wt. %, (in relation to l00 wt. % monomers), of ethylenically unsaturated comonomers M3 that differ from styrene and butadiene, according to a monomer feed process in the presence of between 0.05 and 0.5 wt. %, (in relation to l00 wt. % monomers), of at least one hydrocarbon KW comprising between 6 and 20 C atom s, selected from compounds, which form a pentadienyl or a 1-phenylallyl radical during the abstraction of a hydrogen atom, or from .alpha.-methylstyrene dimers. Said method is characterised in that at least 30 % of the hydrocarbo n KW is already present in the polymerisation vessel and the residual quantity of the hydrocarbon KW is fed to the polymerisation reaction during the cours e of the latter.

    METHOD FOR PRODUCING AQUEOUS STYRENE-BUTADIENE POLYMER DISPERSIONS
    24.
    发明专利
    METHOD FOR PRODUCING AQUEOUS STYRENE-BUTADIENE POLYMER DISPERSIONS 未知

    公开(公告)号：CA2461672A1

    公开(公告)日：2003-04-10

    申请号：CA2461672

    申请日：2002-09-30

    Applicant: BASF AG

    Inventor： MANDERS LAMBERTUS ,  WIRTH THOMAS ,  GASCHLER WOLFGANG ,  KROENER HUBERTUS

    IPC: C08F2/38 ,  C08F212/08 ,  C08F236/06

    Abstract: The invention relates to a method for producing an aqueous styrene-butadiene polymer dispersion by carrying out a radical aqueous emulsion polymerization of a monomer mixture M containing: 40 to 80 wt. % of styrene depicted as Monomer M1; 20 to 60 wt. % of butadiene depicted as monomer M2, and; 0 to 40 wt. %, with regard to 100 wt. % of the monomers, of ethylenically unsaturate d comonomers M3 that differ from styrene and butadiene. The polymerization is carried out according to a monomer feeding method in the presence of 0.05 to 0.5 wt. %, with regard to 100 wt. % of the monomers, of at least one hydrocarbon KW selected among compounds having 6 to 20 C atoms that form a pentadienyl radical or a 1-phenylallyl radical when a hydrogen atom is abstracted, and the .alpha.-methylstyrene dimer. The inventive method is characterized in that the monomers to be polymerized are introduced within three hours of the polymerization reaction.

    25.
    发明专利
    未知

    公开(公告)号：DE19940399A1

    公开(公告)日：2001-03-01

    申请号：DE19940399

    申请日：1999-08-25

    Applicant: BASF AG

    Inventor： KASTENHUBER WALTER ,  KROENER HUBERTUS ,  FUNKHAUSER STEFFEN

    IPC: F04D29/22 ,  F04D7/04 ,  F04D29/42 ,  F04D29/18 ,  F04D29/24

    Abstract: The invention relates to a device for transporting polymer dispersions. Said device can be driven by a drive system and is configured in the form of an impeller (28). Said impeller can be surrounded by a housing or project freely into the polymer dispersion contained in a reactor vessel. A number of blades (2) are arranged in the area of the hub (1) of the impeller (28) in such a way that the polymer dispersion flows evenly through the pump chambers (5, 25) on the front side (7) and the rear side (8) of the impeller (28).

    26.
    发明专利
    未知

    公开(公告)号：DE19905712A1

    公开(公告)日：2000-08-17

    申请号：DE19905712

    申请日：1999-02-11

    Applicant: BASF AG

    Inventor： KROENER HUBERTUS ,  KLOSTERMANN RAINER ,  BIRK JOACHIM ,  HAUFF THOMAS

    IPC: B01J19/00 ,  B01J19/18 ,  C08F2/01 ,  C08F2/22 ,  C08G85/00

    Abstract: The invention relates to a method for on-line monitoring and controlling the monomer conversion during emulsion polymerization. According to said method, a balance is continuously made, starting from an initialization point in time, of the heat amount Q?IN? fed to a reaction, the reaction enthalpy Q?RE? added by the supply with monomers and the amount of heat Q?OUT? dissipated from the reactor. A non-dissipated amount of heat Q?AD? is calculated on the basis of these values which in the case of a spontaneous adiabatic reaction would result in an increase in the internal temperature and the internal pressure of the reactor. A check is carried out whether the potential adiabatic temperatures and pressures are always within the predetermined upper limits. If said upper limits are exceeded, the addition of monomers to the reactor is slowed down or stopped.

    30.
    发明专利
    未知

    公开(公告)号：DE50206929D1

    公开(公告)日：2006-06-29

    申请号：DE50206929

    申请日：2002-09-30

    Applicant: BASF AG

    Inventor： MANDERS LAMBERTUS ,  WIRTH THOMAS ,  GASCHLER WOLFGANG ,  KROENER HUBERTUS

    IPC: C08F212/08 ,  C08F2/38 ,  C08F236/06

    Abstract: A process for preparing an aqueous styrene-butadiene polymer dispersion by free-radical aqueous emulsion polymerization of a monomer mixture M containing from 40 to 80% by weight of styrene as monomer M1, from 20 to 60% by weight of butadiene as monomer M2, and from 0 to 40% by weight, based on 100% by weight of monomers, of ethylenically unsaturated comonomers M3 other than styrene and butadiene by a monomer feed technique in the presence of from 0.05 to 0.5% by weight, based on 100% by weight of monomers, of at least one hydrocarbon HC selected from compounds having 6 to 20 carbon atoms which on abstraction of a hydrogen atom form a pentadienyl radical or a 1-phenylallyl radical and from alpha-methylstyrene dimer comprises supplying the monomers to be polymerized to the polymerization reaction over the course of 3 hours.

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