Wolff Walsrode Ag

Bayer Aktiengesellschaft

Helmut Huhn

Werner Karstens

Lutz Hoppe

Eugen Reinhardt

Siegfried Kaiser

Process for the preparation of aqueous solutions of hydrolysed styrene/acrylonitrile copolymers, the carboxyl groups of which are entirely or partly present as NH.sub.4 and/or alkali metal salt, characterized in that

Process for the preparation of water-soluble copolymers

Water swellable substances based on crosslinked polyacrylonitrile hydrolysates, preferably in granulate form useful for improving water retention in sandy soils and plant substrates.

High molecular weight water-swellable substances

Coupled tubular casings are obtained by placing a coupling piece, preferably a multilayered foil, on the inside of and overlapping two adjacent ends of tubular casings to be coupled and whose adjacent edges make an angle of 10.degree. to 80.degree. with the envisaged axis of the tubular casing, and sealing it.

Coupled tubular casing for foodstuffs

A process for the production of water-soluble hydrolyzed polyacrylonitrile polymers, wherein the acrylonitrile is polymerized in the presence of 1-8% by weight of hydrolyzed polyacrylonitrile and hydrolyzed without intermediate isolation from the reaction mixture.

Process for the production of water-soluble hydrolyzed products of

Aqueous polymer mixture, process for its preparation and its use as substrate anchoring, blocking resistant one-coat sealing lacquer on sheet products. An aqueous polymer mixture containing at least two polymeric components A and B, A being present in form of an aqueous dispersion and consisting of micronuclear shell structures comprising as nuclear portion a copolymer of methyl acrylate, ethyl acrylate, acrylic acid, methacrylic acid -n-butyl ester and/or methyl methacrylate and vinylidene halide and as shell portion a copolymer of methyl acrylate, ethyl acrylate, ethyl methacrylate ethyl hexyl acrylate, n-butyl (meth)acrylate and/or itacaconic acid and vinylidene halide; and B being present in form of an aqueous alkaline solution and consists of a (co)polymer of unsaturated carboxylic acid amide -N-methylol derivatives and optionally unsaturated carboxylic acids and/or amides of said acids.

Growing community of inventors

Walsrode, Germany

Helmut Huhn