Basf Aktiengesellschaft

Basf Corporation

Ulrich Goeckel

Heinrich Hartmann

Walter Denzinger

Hans-Juergen Raubenheimer

Ekhard Winkler

Felix Richter

Harro Petersen

Alfred Oftring

Richard Baur

Rolf Fikentscher

Eberhard Schupp

Rolf Osterloh

Johannes Perner

Alexander Kud

Werner Loch

Thomas Schwerzel

Guenter Eckert

Charalampos Gousetis

Stefan Birnbach

Alfred Ruland

Kurt Fischer

Lothar Wuertele

Use of water-soluble copolymers of monoethylenically unsaturated

Water-soluble copolymers of maleic acid useful as water treatment agents are prepared by copolymerizing

Preparation of water-soluble copolymers of maleic acid and use thereof

Glycerol aminocarboxylates of the formula ##STR1## where n is from 0 to 10 and

Glycerol aminocarboxylates and preparation and use thereof

Condensates based on substituted ureas, their reaction products with di- and/or polyisocyanates, derivatives of di- and/or polycarboxylic acids or p-substituted phenols and/or their methylol derivatives, their preparation and their use. These condensates each contain two or more cyclic urea units and can be prepared either by reacting primary di- or polyamines with ureas and reacting the product with predominantly CH-acidic aldehydes or by reacting primary amines with isocyanates and reacting the product with predominantly CH-acidic aldehydes in the presence of an acidic catalyst. The said condensates and their reaction products are useful for the preparation of heat-curable coating materials and of binders for cathodic electrocoating.

Reaction products and condensates based on substituted propyleneureas

A process for the preparation of polymaleic acid by polymerizing maleic anhydride in an aromatic hydrocarbon at from 60.degree. to 200.degree. C., using from 1 to 20% by weight, based on maleic anhydride, of peroxyesters derived from saturated or ethylenically unsaturated carboxylic acids, as the polymerization initiators and hydrolyzing the polymer, the polymaleic acid thus obtained and the use of the polymaleic acid as an agent for reducing scale formation and hard water deposits in systems through which water flows.

Polymaleic acid, its preparation and its use

Slightly crosslinked, water-soluble polymaleic acid which is obtainable by polymerization of maleic anyhdride with from 0.1 to 10% by weight of a crosslinking agent in an aromatic hydrocarbon at from 60 to 200.degree. C. in the presence of from 1 to 20% by weight, based on maleic anhydride, of a peroxyester, and hydrolysis of the polymer to give slightly crosslinked polymaleic acid having a Fikentscher K value of from 8 to 20 (measured at 20.degree. C. in 5% strength aqueous solution at pH 7 as the Na salt), a process for the preparation of slightly cross-linked polymaleic acid, and its use as a water treatment agent for reducing boiler scale and hard water deposits in water-conveying systems.

Slightly crosslinked, water-soluble polymaleic acid, its preparation and

A process is disclosed for insolubilizing casein coatings for leather utilizing alkoxy alkyl ureas. The coatings are cured in the presence of an acid catalyst. The casein coatings of the invention avoid the disadvantageous use of aldehydes such as formaldehyde and glutaraldehyde to cure the casein and reduce its water sensitivity and unexpectedly show improved wet abrasion resistance.

Casein coatings for leather insolubilized with alkoxy alkyl ureas

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Boehl-Iggelheim, Germany

Ulrich Goeckel