Basf Se Corporation

Maria Thomas

Karl Haeberle

Marc Fricke

Peter Huntemann

Lars Schoen

Rainer Hensiek

Roland Fabisiak

Bernd Schaper

Markus Bubolz

Dirk Kempfert

Ulrich Treuling

Dirk Weinrich

Frank Schaefer

Guenter Scholz

Maria Teresa Hechavarria Fonseca

Wibke Loelsberg

Bernd Zaschke

Karl Häberle

Torben Kaminsky

Heinrich Bollmann

Fatemeh Ahmadnian

Marcel Nobis

Ruediger Viereck

Markus Kraemer

Sven Lawrenz

Günter Scholz

Volker Vogelsang

Lars Rehling

Marion Wenzel

Carsten Buschmann

Kai Henke

Thorsten Inderrieden

Lars Schön

Rüdiger Viereck

Frank SCHÄFER

Markus KRÄMER

Lars SCHÖN

Jan-Michael Dreisörner

Johann Knake

A process for purifying a polycarbodiimide comprising (a) providing a mixture comprising a polycarbodiimide and a carbodiimidization catalyst; (b) separating carbodiimidization catalyst from the polycarbodiimide by subjecting the mixture according to (a) to a first distillation, (c) adding an entrainer to the first bottom product obtained from (b) to obtain a mixture; (d) further separating carbodiimidization catalyst from the polycarbodiimide by subjecting the mixture obtained from (c) to a second distillation.

Process for the purification of a polycarbodiimide

A process for producing a polycarbodiimide, comprising polymerizing a diisocyanate in the presence of a carbodiimidization catalyst in a reaction vessel in liquid phase at a temperature in the range of from 20 to 250&#xb0; C., at a pressure in the range of from 20 to 800 mbar and in the presence of at least one inert gas, wherein the at least one inert gas is introduced into the liquid phase in the reaction vessel with a flow rate in the range of from 0.1 x/h to 100 x/h, x being the volume of the reaction vessel.

Process for producing polycarbodiimide

The invention relates to a process for the production of composites, composed of at least one outer layer b) and of an isocyanate-based rigid foam a), where the outer layer b) is moved continuously and the starting material for the isocyanate-based rigid foam a) is applied to the outer layer b), which comprises achieving the application of the liquid starting material for the isocyanate-based rigid foam a) by means of at least one fixed tube c) which has openings f) and which has been placed, with respect to the outer layer b), so as to be parallel to the plane of the outer layer and at right angles to the direction of movement.

Methods for producing composite elements based on foams based on isocyanate

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Muehlen, Germany

Maria Thomas