Basf Aktiengesellschaft

Chung-Ji Tschang

Klaus Glaser

Axel Sanner

Ekhard Winkler

Guenther Gotsmann

Heinrich Klefenz

Alfred Oftring

Walter Denzinger

Rolf Fikentscher

Johannes P Dix

Christos Vamvakaris

Gerold Braun

Bernd Burkhart

Stefan Marcinowski

Bernhard Dung

Karlheinz Messmer

Jurgen Hartmann

Erwin Hahn

Volker Schwendemann

Andreas Keller

Bernhard Schuler

Norbert Greif

Wolfgang Ladner

Gerhard Bauer

Peter Keller

Bernd Stanger

Sven Lawrenz

Reinhard B&auml;cher

J&uuml;rgen Schmidt-Th&uuml;mmes

Wolfgang Zahn

Elmar Schwarzenbach

J&uuml;rgen Hartmann

A polymer dispersion is prepared by free radical polymerization of an aqueous monomer emulsion by a process in which the monomer emulsion is prepared continuously at the rate of consumption.

Method for the production of a polymer dispersion by radical aqueous emulsion polymerization with a continuously produced aqueous monomer emulsion

Preparation of an aqueous polymer dispersion

Paper coating slips contain an emulsion copolymer, comprising overall

Alkenylnitrile-containing binders for paper coating slips

Production of nickelized shaped articles

Production of shining shaped articles coated with zinc or a zinc alloy

Polymeric, unquaternized or quaternized condensates which contain piperazine rings bonded via chain members are used as conditioners for the pretreatment of nonmetallic surfaces of moldings before their activation for subsequent chemical metallization. This procedure gives particularly uniform and well adhering metal coatings.

Polymeric conditioner for pretreating nonmetallic surfaces for chemical

Copper is chemically deposited from alkaline aqueous baths containing polyacetal complexing agents obtainable by reacting

Chemical deposition of copper from alkaline aqueous baths

Certain quaternary salts of di- and/or tri-(alkanol)-amines, which salts are soluble in the aqueous bath employed, are used as conditioners for pretreating nonmetallic surfaces of moldings prior to their activation for subsequent chemical metallization. Outstandingly uniform and strongly adhering metal coatings are obtained in this manner.

Sulfatobetaines are prepared by reacting an addition compound of sulfur trioxide and a tertiary amine with an alkylene carbonate.

Preparation of sulfatobetaines

Sulfatobetaines are prepared by reacting an adduct of a base having a tertiary N atom and sulfur trioxide with an alkylene oxide in the presence of an alkylene carbonate as a solvent.

Enzymes are immobilized by mixing the following components with one another in aqueous solution:

Immobilization of enzymes with a water-soluble glycidyl ether

Insoluble polymer powders which are only slightly swellable are prepared by polymerization of N-vinylpyrrolidone or a mixture of (a) an N-vinylcarboxamide, 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.degree. 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.

Preparation of insoluble polymer powders which are only slightly

Insoluble polymer powders which are only slightly swellable and are based on N-vinylpyrrolidone are prepared by polymerization of N-vinylpyrrolidone 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 a 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.degree. 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.

A macroporous, hydrophilic enzyme carrier comprises a sulfonated polymer, charged with polyethyleneimine, of from 10 to 100% by weight of divinylbenzene, from 0 to 90% by weight of styrene and from 0 to 20% by weight of a copolymerizable monomer, the polyethyleneimine being neither crosslinked nor covalently bonded to the polymer.

Macroporous, hydrophilic enzyme carrier

A process for the preparation of an enzymatically active formulation embedded in silica gel, wherein an aqueous mixture of an enzymatically active formulation and a dissolved alkali metal silicate and/or ammonium silicate is suspended in an organic, water-immiscible fluid and then converted to a water-insoluble gel.

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Bad Durkheim, Germany

Chung-Ji Tschang