Basf Aktiengesellschaft

Hans-Jurgen Raubenheimer

Walter Denzinger

Heinrich Hartmann

Axel Sanner

Christian Schade

Johannes Perner

Birgit Potthoff-Karl

Axel Kistenmacher

Ekhard Winkler

Angelika Funhoff

Peter Hossel

Felix Richter

Gerhard Faulhaber

Ulrich Gockel

Quaternized copolymers suitable as active ingredients in hair styling compositions are obtainable from N-vinylimidazoles, N-vinylcaprolactam, N-vinylpyrrolidone and, if required, further monomers.

Quaternized copolymers suitable as active ingredients in cosmetic

A water-soluble or water-dispersible graft copolymer obtainable by free-radical graft copolymerization of

Water-soluble or water-dispersible graft copolymers, the preparation

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

40The efficiency of high molecular weight crosslinked polycarboxylic acids which are used as thickeners for neutral and alkaline aqueous systems and are obtained by precipitation polymerization or suspension polymerization of a mixture of

Increasing the efficiency of high molecular weight crosslinked

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Ketsch, Germany

Hans-Jurgen Raubenheimer