Basf Aktiengesellschaft

Basf Se Corporation

Ulrich Filges

Oral Aydin

Eberhard Schupp

Karl Haeberle

Gerhard Auchter

Rainer Dobrawa

Josef Neutzner

Bernd De Potzolli

Ralf Widmaier

Lothar Maempel

Klaus Schnell

Karl-Hermann Strube

Reinhold Dieing

Hermann Anders

Wolfgang Bouquet

Andreas Gruber

Jürgen Nieberle

Ulrike Licht

Dirk Wulff

Gerhard Bauer

Martin Meister

Andreas Otterbach

Werner Langer

Thomas Christ

Juergen Barwich

Tanja Schneider

Klaus Vorspohl

Volker B&uuml;hler

Andy Wolff

Described is a process for producing aqueous solutions of vinyllactam polymers and solids obtainable therefrom by drying, especially polyvinylpyrrolidone, said process comprising using one or more sulfur components selected from the group consisting of sulfur dioxide, sulfurous acid and one or more salts of sulfurous acid, to reduce residual monomer. Also described are vinyllactam polymers obtainable by the process which have good stability in storage, the use of these vinyllactam polymers, and articles of manufacture and preparations comprising these vinyllactam polymers or obtained by use thereof.

Producing aqueous solutions of vinyllactam polymers and powders thereof

Described is a radiation-crosslinkable hotmelt adhesive comprising at least one radiation-crosslinkable poly(meth)acrylate formed to an extent of at least 60% by weight of C1 to C10 alkyl(meth)acrylates and at least one oligo(meth)acrylate which comprises nonacrylic C C double bonds and has a K value of less than or equal to 20. The hotmelt adhesive comprises a photoinitiator which may be present in the form of an additive not attached to the poly(meth)acrylate and/or not attached to the oligo(meth)acrylate, may be incorporated by copolymerization into the poly(meth)acrylate, and/or may be attached to the oligo(meth)acrylate. The hotmelt adhesive can be used for producing adhesive tapes.

Hotmelt adhesive comprising radiation-crosslinkable poly(meth)acrylate and oligo(meth)acrylate with nonacrylic C-C double bonds

Method of producing copolymers by free-radical polymerization of at least one water-soluble N-vinyllactam and at least one hydrophobic comonomer in an organic solvent in the presence of an initiator, where the polymerization is carried out under a gauge pressure such that evaporation of the components is avoided.

Method of producing water-soluble nonturbid copolymers of at least one water-soluble N-vinyllactam and at least one hydrophobic comonomer by polymerization under increased pressure

Methods of producing vinyllactam copolymers which include: providing at least one water-soluble N-vinyllactam; providing at least one hydrophobic comonomer; and subjecting the at least one water-soluble N-vinyllactam and the at least one hydrophobic comonomer to free-radical polymerization in an organic solvent in the presence of an initiator, under a combination of process measures selected from the group consisting of A and B; wherein:

Methods of producing water-soluble, non-turbid copolymers of at least one water-soluble N-vinyllactam and at least one hydrophobic comonomer

Preparations in powder form comprising or consisting of soluble or insoluble polyvinylpyrrolidone and/or polyvinylpyrrolidone copolymers and suitable as aid for pharmaceutical formulations comprise in homogeneous dispersion very small amounts of heavy metals which are physiologically tolerated in these amounts, or very small amounts of peroxide-cleaving enzymes.

Stabilized polyvinylpyrrolidone formulation

Copolymers which are self-curable with atmospheric humidity and are based on acrylic, methacrylic and/or vinyl esters which have been prepared using silicon-containing regulators, and mixtures of such polymers with crosslinkers, are suitable as adhesive, sealing and coating compositions which are self-curable with atmospheric humidity.

Copolymers and mixtures which are self-curable with atmospheric humidity

Nonaqueous polyisocyanate formulation containing

Nonaqueous polyisocyanate formulation

Aqueous dispersions of a copolymer obtained by free-radical polymerization and containing from 0.01 to 40% w/w of polymerized units of comonomers having at least one aldehyde or keto group, which dispersions contain at least one polyisocyanate in which the isocyanate groups are blocked by oximes.

Aqueous synthetic resin preparation capable of cross-linking at room

Nonaqueous plastics formulations

Silicon-containing polymers composed mainly of acrylates and/or

Growing community of inventors

Neustadt, Germany

Ulrich Filges