Basf Aktiengesellschaft

Basf Corporation

Felix Richter

Ekhard Winkler

Heinrich Hartmann

Alfred Oftring

Walter Denzinger

Richard Baur

Rolf Fikentscher

Hans-Juergen Raubenheimer

Stefan Birnbach

Ulrich Goeckel

Wolfgang Trieselt

Johannes Perner

Paul Diessel

Werner Bochnitschek

Hans-Jurgen Raubenheimer

Ulrich Gockel

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

Serine-N,N-diacetic acid and derivatives thereof are prepared in various ways and used in particular as complexing agents, bleaching agent stabilizers and builders in detergents.

Serine-N,N-diacetic acid and derivatives as complexing agents and

Preparation of serine-N,N-diacetic acid and derivatives as complexing

Slightly crosslinked, water-soluble polymaleic acid which is obtainable by polymerization of maleic anhydride with from 0.1 to 10% by weight of a crosslinking agent in an aromatic hydrocarbon at from 60.degree. 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 crosslinked 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

2-Hydroxy-3-aminopropionic-N,N-diacetic acid and derivatives thereof are used in particular as complexing agents, bleaching agent stabilizers and builders in detergents.

2-Hydroxy-3-aminopropionic-n,n-diacetic acid and derivatives thereof,

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.

Polyacetals, preparation thereof from dialdehydes and polyolcarboxylic

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Bruehl, Germany

Felix Richter