Basf Aktiengesellschaft

Karl Herrle

Walter Denzinger

Wolfgang Schwarz

Ernst Hofmann

Petr Simak

Franz Haaf

Guenter Hatzmann

Kurt Seelert

Hermann Gausepohl

Johannes Perner

Hans-Uwe Schenck

Wolfgang Linke

Aqueous solutions of polyvinylpyrrolidone-iodine, generally referred to as PVP-iodine, which is finding increasing use because of its germicidal, bactericidal, fungicidal and disinfectant properties.

Manufacture of aqueous polyvinylpyrrolidone-iodine solutions

Low molecular weight poly-N-vinyl-pyrrolidone-2 is prepared by polymerizing N-vinylpyrrolidone-2 at elevated temperature in the presence of organic peroxides which carry organic radicals on either side of the peroxide group.

Manufacture of low molecular weight poly-N-vinylpyrrolidone-2

A process for the continuous manufacture of vinylpyrrolidone polymers of low K values, wherein vinylpyrrolidone, with or without comonomers copolymerizable therewith, is polymerized in organic solvents at elevated temperatures and superatmospheric pressures in the presence of a source of free radicals.

Manufacture of vinylpyrrolidone polymers

Mixtures based on vinyl chloride polymers and small amounts of a copolymer of an ester of acrylic acid or methacrylic acid. The said copolymer contains acrylic acid ester or methacrylic acid ester units, units which contain a lactone ring structure, and, optionally, units of other copolymerizable monomers. The mixtures exhibit improved processability and may in particular be used for the manufacture of films, sheets and the like.

Thermoplastic vinyl chloride polymer compositions with improved

Mixtures based on vinyl chloride polymers and small amounts of copolymer of an ester of acrylic acid or methacrylic acid, which mixtures have been obtained by polymerization of vinyl chloride in the presence of the above copolymer. The said copolymer contains acrylic acid ester or methacrylic acid ester units, units which contain a lactone ring structure, and, optionally, units of other copolymerizable monomers. The mixtures exhibit improved processability and may in particular be used for the manufacture of films, sheets and the like.

Thermoplastic compositions with improved processing properties

Polyvinylpyrrolidone-iodine, manufactured by reaction of iodine and a polyvinylpyrrolidone obtained by polymerization in an anhydrous organic solvent in the presence of a source of free radicals and optionally in the presence of a heavy metal of atomic number from 23 to 29, in the form of a complex compound or of a salt with an organic acid, as a co-activator, followed by steam distillation of this polyvinylpyrrolidone, if appropriate. The PVP-iodine of the invention is very stable and can be used as a disinfectant.

Manufacture of polyvinylpyrrolidone-iodine

Manufacture of insoluble polyvinyl lactams in the absence of oxygen and in the presence of .alpha.- or .beta.-ketocarboxylic acids or esters thereof.

Manufacture of insoluble and only slightly water-swellable polymers of

Manufacture of insoluble polyvinyl lactams by polymerization in the absence of oxygen and in the presence of sulfur compounds having a functionality of less than 6.

Copolymers obtained by copolymerization of vinyl esters of aliphatic carboxylic acids and/or acrylic or methacrylic acid esters of aliphatic alcohols, with half-esters of ethylenically unsaturated dibasic carboxylic acids, followed by neutralization with bases, are used in hair setting compositions.

Hair setting compositions containing easily removable neutralized

Manufacture of insoluble poly-N-vinyl-pyrrolidone-2 or copolymers of N-vinylpyrrolidone-2 in the presence of a difunctional crosslinker by heating the reaction solution at temperatures above 80.degree.C and completing the reaction at the boiling temperature of water.

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Ludwigshafen, Germany

Karl Herrle