公开(公告)号：CA1194648A

公开(公告)日：1985-10-01

申请号：CA362436

申请日：1980-10-15

Applicant: BASF AG

Inventor： MESSMER KARLHEINZ ,  STEDEFEDER JOACHIM ,  FISCHER HERMANN ,  HARTMANN HEINRICH

IPC: C08F2/00 ,  C08F2/06 ,  C08F2/14 ,  C08F2/34

Abstract: PREPARATION OF POLYMER POWDERS of the disclosure: Polymer powders are prepared from polymerizable monoethylenically unsaturated compounds, which boll at above +5.degree.C under atmospheric pressure, by polymerizing the monomer, in the form of a 5 - 50% strength solution or emulsion in an inert organic solvent which is a precipitant for the polymer, in a powder bed in the presence of a conventional polymerization initiator, whilst maintaining the reaction mixture in the form of a powder and causing it to circulate, the organic solvent being removed, as vapor, from the polymerization zone during the polymerization.

公开(公告)号：CA1241798A

公开(公告)日：1988-09-06

申请号：CA490882

申请日：1985-09-17

Applicant: BASF AG

Inventor： TSCHANG CHUNG-JI ,  MESSMER KARLHEINZ ,  DENZINGER WALTER

IPC: C08F218/00 ,  C08F2/12 ,  C08F2/36 ,  C08F2/44 ,  C08F20/00 ,  C08F20/52 ,  C08F26/00 ,  C08F26/10 ,  C08F218/02 ,  C08F220/00 ,  C08F220/10 ,  C08F220/56 ,  C08F226/06 ,  C08F226/10

Abstract: Insoluble polymer powders which are only slightly swellable and are based on N-vinyl-pyrrolidone are prepared by polymerization of N-vinyl-pyrrolidone or a mixture of this with copolymerizable monomers and from 0.1 to 10% by weight, based on the total amount of monomers, of a crosslinking agent in 2 powder bed in the presence of a heat-transfer medium, which is inert to the reactants, and in the absence of oxygen and polymerization initiators, at from 90 to 220.degree.C, while maintaining the powder state, circulating the reaction mass and evaporating the heat-transfer medium from the polymerization zone. The resulting insoluble polymers which are only slightly swellable are used as adsorbents or formulation assistants for fertilizers and crop protection agents.

公开(公告)号：CA1183645A

公开(公告)日：1985-03-05

申请号：CA396587

申请日：1982-02-18

Applicant: BASF AG

Inventor： MESSMER KARLHEINZ ,  FISCHER HERMANN ,  HARTMANN HEINRICH ,  DENZINGER WALTER ,  SCHNEIDER ROLF ,  WULZ KLAUS ,  RAUBENHEIMER HANS-JUERGEN

IPC: C08F20/00 ,  C08F20/02 ,  C08F210/00 ,  C08F222/06 ,  C09K23/52 ,  C11D3/37 ,  D21H17/43 ,  D21H19/58 ,  C08F2/00 ,  C08F22/06

Abstract: Maleic anhydride copolymer powders are prepared by a process wherein a solution or dispersion of maleic anhydride in an alkyl vinyl ether and/or an alkene, containing from 3 to 25 moles of the alkyl vinyl ether and/or alkene per mole of maleic anhydride, is brought into contact with a powder bed under polymerization conditions, and is polymerized in the bed whilst the reaction mass is circulated and the powder state is maintained, and the heat generated during polymerization is removed by evaporating excess monomer which boils lower than maleic anhydride. The products are useful as crust inhibitors for detergents, dispersants for pigments, paper sizes, adhesive auxiliaries, cosmetic auxiliaries and thickeners for aqueous polymer solutions or dispersions.

公开(公告)号：CA1258348A

公开(公告)日：1989-08-08

申请号：CA490881

申请日：1985-09-17

Applicant: BASF AG

Inventor： TSCHANG CHUNG-JI ,  MESSMER KARLHEINZ ,  DENZINGER WALTER

IPC: C08F218/00 ,  C08F2/12 ,  C08F2/36 ,  C08F2/44 ,  C08F20/00 ,  C08F20/52 ,  C08F26/00 ,  C08F26/10 ,  C08F218/02 ,  C08F218/04 ,  C08F220/00 ,  C08F220/04 ,  C08F220/06 ,  C08F220/10 ,  C08F220/56 ,  C08F226/02 ,  C08F226/10

Abstract: Insoluble polymer powders which are only slightly swellable are prepared by polymerization of N-vinylpyrrolidone or a mixture of (a) an Nvinylcarboxamide, acrylamide, methacrylamide, acrylic acid, methacrylic acid, acrylates, methacrylates and/or a vinyl ester and (b) from 0.1 to 10% by weight, based on the total amount of monomers, of, as a crosslinking agent, a compound possessing two or more ethylenically unsaturated double bonds, in a powder bed in the presence of a heat-transfer medium and in the absence of oxygen and polymerization initiators, at from 90 to 220.degree.C, the powder state being maintained, the reaction mass being circulated and the heat-transfer medium evaporated from the polymerization zone. The resulting polymers are used as adsorbents, as formulation assistants for crop protection agents or as ion exchangers.

公开(公告)号：CA1247796A

公开(公告)日：1988-12-28

申请号：CA508421

申请日：1986-05-05

Applicant: BASF AG

Inventor： MESSMER KARLHEINZ ,  HENNIG KARL ,  DENZINGER WALTER ,  HETTCHE ALBERT ,  TRIESELT WOLFGANG ,  RAUBENHEIMER HANS-JUERGEN

IPC: C08F2/00 ,  C08F2/10 ,  C08F2/34 ,  C08F2/36 ,  C08F4/00 ,  C08F4/04 ,  C08F4/28 ,  C08F4/32

Abstract: Water-soluble polymer powders are prepared by polymerizing water-soluble ethylenically unsaturated monomers in a powder bed in the presence of polymerization initiators and water while maintaining the powder state, removing the heat of polymerization by distilling off water and circulating the reaction mixture, by a process in which water-insoluble organic peroxides which are liquid at 20.degree.C are used alone or as a mixture with up to 50% by weight, based on the initiator mixture, of water-soluble, organic azo initiators and/or waterinsoluble solid peroxy-containing compounds, as polymerization initiators.

公开(公告)号：CA1241497A

公开(公告)日：1988-08-30

申请号：CA442498

申请日：1983-12-02

Applicant: BASF AG

Inventor： HENNIG KARL ,  MESSMER KARLHEINZ ,  HARTMANN HEINRICH

IPC: C08F2/38 ,  C08F20/06 ,  C11D3/37 ,  D21H19/58

Abstract: Pulverulent polymers based on water-soluble ethylenically unsaturated monomers are prepared by polymerizing monomers, which contain acidic groups and are dissolved in water or a water/isopropanol mixture, in a powder bed in the presence of a conventional polymerization initiator while maintaining the powder state, conducting away the heat of polymerization by distilling off the solvent and circulating the reaction mixture, by a process in which from 40 to 95% of the acidic groups of the monomers are neutralized and the polymerization is carried out in the presence of from 3 to 10 mole%, based on the monomers, of a thiocarboxylic acid, of a metal salt or chelate, of an enol-ether or of Z-mercaptoethanol as a regulator. The homopolymers and copolymers thus obtained are used as milling assistants and dispersants for pigments and as encrustation inhibitors and antiredeposition agents for detergents.