Basf Aktiengesellschaft

Dieter Hertel

Alfred Oftring

Georg Schuh

Gerhard Wolf

Helmut Wolf

Hans-Heinrich Bechtolsheimer

Beate Strecker

Peter Horn

Sarbananda Chakrabarti

Beate Ehle

Ludwig Jung

Gerhard Lehr

Martin Aus Kahmen

Rudolf Alt

Continuous preparation of N-acylamino carboxylic acids and N-acylamino

Preparation of N-acylamino carboxylic acids and N-acylamino sulfonic

Rigid polyurethane foams, preferably semirigid polyurethane foams, are produced by reacting an organic and/or modified organic polyisocyanates with relatively high molecular weight polyhydroxyl compounds and, optionally, low molecular weight chain extenders and/or crosslinkers in the presence of water or mixtures of water and physically acting blowing agents, optionally, catalysts, at least one additive selected from the group consisting of sulfonate salts of an acid group-containing alkylene oxide polymer, a phosphonate salt of an acid group-containing alkylene oxide polymer, and mixtures thereof, additional other additives and optionally, auxiliaries. The polyurethane foams produced by this process can be used to produce composite comprising at least one covering layer and at least one layer comprising a rigid or semirigid polyurethane foam produced by the process of the present invention.

Production of rigid or semirigid polyurethane foams and composite

Preparation of alkyl glycosides

Process for the preparation of N-alkanoyl-polyhydroxyalkylamines

Growing community of inventors

Leimen, Germany

Dieter Hertel