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).

公开(公告)号：DE4202192A1

公开(公告)日：1993-07-29

申请号：DE4202192

申请日：1992-01-28

Applicant: BASF AG

Inventor： DERSCH ROLF DR ,  GRUND NORBERT DR ,  NIESSNER MANFRED DR ,  SCHNEIDER REINHARD DR

IPC: C09D7/00

公开(公告)号：DE4123049A1

公开(公告)日：1993-01-14

申请号：DE4123049

申请日：1991-07-12

Applicant: BASF AG

Inventor： UHL GUENTER ,  GRUND NORBERT DR ,  SCHNEIDER REINHARD DR ,  KRACK INGEBORG DR ,  NIESSNER MANFRED DR ,  HARTMANN HEINRICH DR

IPC: C08F2/32 ,  C08F220/06 ,  D06P1/52

Abstract: Crosslinked copolymers containing crosslinkable groups based on acrylic acid or methacrylic acid which are obtainable by copolymerisation of (a) from 50 to 99 parts by weight of acrylic acid and/or methacrylic acid, (b) from 1 to 50 parts by weight of at least one N-methylol(meth)acrylamide, or derivatives thereof, (c) from 50 to 10000 ppm, based on monomers (a) and (b), of an at least bifunctional crosslinking agent and (d) from 0 to 49 parts by weight of other monoethylenically unsaturated monomers, in the presence of polymerisation initiators which form free radicals, a process for the preparation of the crosslinkable copolymers by copolymerising the monomers (a), (b), (c) and, if used, (d) in the aqueous phase of a water-in-oil emulsion, and the use of the copolymers as thickeners for textile printing pastes.

公开(公告)号：DE3926120A1

公开(公告)日：1991-02-14

申请号：DE3926120

申请日：1989-08-08

Applicant: BASF AG

Inventor： NIESSNER MANFRED DR ,  GRUND NORBERT DR ,  HEIDE WILFRIED DR ,  HARTMANN HEINRICH DR

IPC: B01D21/01 ,  C02F1/50 ,  C02F1/54 ,  C02F1/56 ,  C02F11/00 ,  C02F11/14 ,  C08F2/32 ,  C08F6/00 ,  C08F6/24 ,  C09K3/00

Abstract: Process for the preparation of finely divided polymer powders by polymerisation of water-soluble monomers in the aqueous phase of a water-in-oil emulsion in the presence of water-in-oil emulsifiers and polymerisation initiators, removal of water from the resulting water-in-oil polymer suspension by an azeotropic method and isolation of the suspended finely divided polymer powder, wherein either the polymerisation of the water-soluble monomers is carried out in the presence of 0.1 to 10% by weight, based on the monomers used in the polymerisation, of protective colloids or the protective colloids are added to the water-in-oil polymer suspension after the end of the polymerisation. The polymerisation is preferably carried out in the presence of a wetting agent. The finely divided pulverulent polymers are used as flocculants or thickeners for aqueous systems.

公开(公告)号：DE3861301D1

公开(公告)日：1991-01-31

申请号：DE3861301

申请日：1988-03-18

Applicant: BASF AG

Inventor： REHMER GERD DR ,  NIESSNER MANFRED DR ,  HEIDE WILFRIED DR ,  HARTMANN HEINRICH DR ,  PETERS KARL-CLEMENS DR

IPC: C08F2/00 ,  C08F2/32 ,  C08F257/00

Abstract: Polymers in bead form are prepared from water-soluble ethylenically unsaturated monomers by a reverse suspension polymerization of a liquid in the presence of polymerization initiators and protective colloids obtainable by grafting polymers (A) containing (a) aromatic monovinyl monome from 40 to 100% by weight (b) C3-6 monoethylenically unsaturated carboxylic acid and/or maleic anhydride from 0 to 60% by weight (c) other monoethylenically unsaturated monomers from 0-20% by weight, as copolymerized units with the proviso that the sum of the weight (a) to (c) is always 100 and the polymer (A) has a molecular weight (number average) from 500 to 20,000 and a hydrogenation iodine number from 1.3 to 51 with a fixed monomer mixture at given concentration levels.

公开(公告)号：DE3709921A1

公开(公告)日：1988-10-06

申请号：DE3709921

申请日：1987-03-26

Applicant: BASF AG

Inventor： REHMNER GERD DR ,  NIESSNER MANFRED DR ,  HEIDE WILFRIED DR ,  HARTMANN HEINRICH DR ,  PETERS KARL-CLEMENS DR

IPC: C08F2/00 ,  C08F2/32 ,  C08F257/00 ,  C08F20/04 ,  C08F20/34 ,  C08F20/54 ,  C08F22/02 ,  C08F22/36 ,  C08F26/00

Abstract: Polymers in bead form are prepared from water-soluble ethylenically unsaturated monomers by a reverse suspension polymerization of a liquid in the presence of polymerization initiators and protective colloids obtainable by grafting polymers (A) containing (a) aromatic monovinyl monome from 40 to 100% by weight (b) C3-6 monoethylenically unsaturated carboxylic acid and/or maleic anhydride from 0 to 60% by weight (c) other monoethylenically unsaturated monomers from 0-20% by weight, as copolymerized units with the proviso that the sum of the weight (a) to (c) is always 100 and the polymer (A) has a molecular weight (number average) from 500 to 20,000 and a hydrogenation iodine number from 1.3 to 51 with a fixed monomer mixture at given concentration levels.