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    Prepn. of vinyl] polymers of low mol. wt.
    11.
    发明专利
    Prepn. of vinyl] polymers of low mol. wt. 未知

    公开(公告)号：DE4203278A1

    公开(公告)日：1993-08-12

    申请号：DE4203278

    申请日：1992-02-06

    Applicant: BASF AG

    Inventor： KEMPTER FRITZ ERDMANN DR ,  NIESSNER MANFRED DR ,  DIENER RALPH DR ,  THIELE HEINO DR ,  WEISS WOLFRAM DR ,  RENZ HANS DR

    IPC: B01J19/18 ,  C08F2/00

    Abstract: The continuous polymerisation of vinyl monomers by formation of vinyl polymers (I) with a mol. wt. of 1000-20,000 is claimed. The polymerisation is carried out at 110-270 deg. C in a ring slit (slit width 0.5-1.00 mm) that is bounded on the inner side by a rotor. Also claimed is the use of (I) as binding agents for paints, protective coatings, paper coating materials and printing inks. The reaction temp. is 150-270 deg. C and the polymer dispersivity (Mw/Mn) of (I) is less than 3.5. A portion of the volumetric flow is recirculated through the ring slit such that the recycle ratio of recirculated volumetric flow to throughput is 2-35. The rotor promotes reacton by thorough mixing and has a tangential avelocity of 0.5-2 m/s. The reaction is carried out in 0-40% of a solvent (w.r.t. monomer). The mixt. of monomers comprises 60-100 wt.% (meth)acrylic acid esters. Polymerisation initiator is added in a molar ratio of 0.0005:1 to 0.1:1 (w.r.t. monomer).

    Prepn. of vinyl] polymers of low mol. wt.
    12.
    发明专利
    Prepn. of vinyl] polymers of low mol. wt. 未知

    公开(公告)号：DE4203277A1

    公开(公告)日：1993-08-12

    申请号：DE4203277

    申请日：1992-02-06

    Applicant: BASF AG

    Inventor： KEMPTER FRITZ ERDMANN DR ,  NIESSNER MANFRED DR ,  DIENER RALPH DR ,  THIELE HEINO DR ,  WEISS WOLFRAM DR ,  RENZ HANS DR

    IPC: B01J19/18 ,  C08F2/00

    Abstract: The continuous polymerisation of vinyl monomers by formation of vinyl polymers (I) with a mol. wt. of 1000-20,000 is claimed. The polymerisation is carried out at 110-270 deg. C in a ring slit (slit width 0.5-1.00 mm) that is bounded on the inner side by a rotor. Also claimed is the use of (I) as binding agents for paints, protective coatings, paper coating materials and printing inks. The reaction temp. is 150-270 deg. C and the polymer dispersivity (Mw/Mn) of (I) is less than 3.5. A portion of the volumetric flow is recirculated through the ring slit such that the recycle ratio of recirculated volumetric flow to throughput is 2-35. The rotor promotes reacton by thorough mixing and has a tangential avelocity of 0.5-2 m/s. The reaction is carried out in 0-40% of a solvent (w.r.t. monomer). The mixt. of monomers comprises 60-100 wt.% (meth)acrylic acid esters. Polymerisation initiator is added in a molar ratio of 0.0005:1 to 0.1:1 (w.r.t. monomer).

    14.
    发明专利
    未知

    公开(公告)号：DE3522359A1

    公开(公告)日：1987-01-02

    申请号：DE3522359

    申请日：1985-06-22

    Applicant: BASF AG

    Inventor： HUPFER LEOPOLD DR ,  PAETSCH JUERGEN DR ,  HOTZ JOHANN ,  THIELE HEINO DR ,  ZETTLER HANS DIETER

    IPC: B01J2/00 ,  B01J2/20 ,  C07C29/94

    Abstract: In order to compound organic materials which are crystalline under standard conditions, these materials, in the pulverulent and/or molten state, are processed in a self-purging, twin-screw extruder in which the screws rotate in the same direction, ejected through one or more narrow passages into a low pressure zone, cooled and comminuted to give particles. In order to improve the pourability and shelf life, the materials are completely crystallized by the time they reach the end of the screws, and are heated during discharge through the narrow passage, in order to form a melt film. Dust-free granules havig a smooth surface can be produced in this manner.

    15.
    发明专利
    未知

    公开(公告)号：DE3763200D1

    公开(公告)日：1990-07-19

    申请号：DE3763200

    申请日：1987-07-24

    Applicant: BASF AG

    Inventor： ZETTLER HANS DIETER ,  THIELE HEINO DR ,  NACHTRAB RAINER ,  SAPPOK REINHARD DR

    IPC: C09B67/20 ,  B01F23/47 ,  C09B67/00 ,  C09C3/00 ,  B01F7/08

    Abstract: 1. A continuous process for the preparation of a poorly flowing flushed color from an aqueous pigment suspension (press cake) and a water-immiscible organic liquid which may or may not contain a binder, with the aid of an intensive mixer, wherein the aqueous pigment suspension (press cake) and the water-immiscible organic liquid (binder) or the mixture of the aqueous pigment suspension (press cake) and water-immiscible organic liquid (binder) are or is continuously fed to an intensive mixing and shearing zone, from 3 to 10% by volume of the mixture present in the said zone being subjected to a shear gradient of from 500 to 7500 S**-1 at any time and the residence time under the action of this shear gradient being from 0.5 to 60 seconds, and the remaining 97-90% by volume of the mixture are subjected to shear gradients which are lower by a factor of 10 or more, and the water phase is separated off from the water/flushed color mixture leaving the intensive mixing and shearing zone.

    Process and device for producing a reactive mixture of at least two components for the production of foams
    19.
    发明专利
    Process and device for producing a reactive mixture of at least two components for the production of foams 未知

    公开(公告)号：DE3416442A1

    公开(公告)日：1984-11-08

    申请号：DE3416442

    申请日：1984-05-04

    Applicant: BASF AG

    Inventor： THIELE HEINO DR ,  WEBER WERNER DR ,  TAUBENMANN PETER

    IPC: B29B7/76 ,  B29D27/02 ,  C08G18/08 ,  C08J9/30

    Abstract: For the production of a foam-forming reactive mixture, at least one of the components disposed in separate supply tanks (1) with a stirrer (6) is charged with gas before mixing with the other component takes place. To this end the component is circulated in a separate circuit by means of a conveying unit (10), the gas is supplied in the suction region and/or compression region of the conveyor unit and the gas-component mixture is compressed. Directly following the compression zone (12) the gas-component mixture is depressurised again by means of a throttle element (11), by which means high proportions of gas can be homogeneously distributed in the liquid component.

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