Basf Aktiengesellschaft

Michael Schiessl

Hans D Zettler

Joerg Rosenberg

Jorg Breitenbach

Bernd Bruchmann

Klaus Hahn

Hans Renz

Jurgen Hofmann

Knut Kaempfer

Jan Holoch

Michael Witt

Josef Wunsch

Martin Reif

Juergen Pfister

Wolfram Husemann

Werner Langer

G&uuml;nter Mohrhardt

Rainer Nachtrab

Michael Baumgartel

Gerhard Dembek

Joachim J&auml;hme

Ralph Diener

Peter Nikolaus Lay

Axel Paul Hartl

Werner Hofscheuer

A process for preparing biuret-functional polyisocyanates from at least one aliphatic or cycloaliphatic diisocyanate and from at least one amine or water or a mixture thereof as reactants involves mixing the reactants with one another in a mixing unit having a high shear action.

Process for producing polyisocyanates containing biuret groups from (cyclo)aliphatic diisocyanates

Method of producing multi-layer medicaments in solid form for oral or

Solid drug forms are produced by mixing and melting at least one pharmacologically acceptable polymeric binder and at least one pharmaceutical active ingredient, with or without conventional pharmaceutical additives, in the absence of a solvent to give a plastic mixture and shaping the mixture to the required drug form by extrusion, where the shaping takes place in two steps, with the extrudate being broken into shaped articles in a first step, and these shaped articles being rounded off in a second step in the plastic state.

Production of solid drug forms

Essentially syndiotactic and semicrystalline polymers which comprise vinylaromatic monomers arc prepared from a reaction mixture containing, as components, vinylaromatic compounds, metallocene complexes as catalysts and one or more cocatalysts selected from the group consisting of the strong, neutral Lewis acids, the ionic compounds having Lewis acid cations and the ionic compounds having Bronsted acids as cations, by a process in which the components are premixed before entering the reactor.

Preparation of semicrystalline syndiotactic polymers of vinylaromatic

Continuous production process of expandable styrene polymer beads

1-Hydroxyanthraquinones are prepared in an improved process by reacting phthalic anhydride or derivatives thereof with phenol derivatives in the presence of a Lewis acid as catalyst and in the presence or absence of a diluent, wherein the improvement comprises conducting the reaction in a self-cleaning apparatus having a mixing effect, at a temperature of from 120.degree. C. to 300.degree. C. for from 5 to 1,000 seconds, the self-cleaning apparatus having a mixing effect subjecting the reactants to a shear gradient of from 50 to 20,000 sec.sup.-1 with an energy input of from 0.01 to 0.2 kwh/kg of reactants.

Preparation of hydroxyanthraquinones

Growing community of inventors

Hassloch, Germany

Michael Schiessl