Covestro Deutschland Ag

Covestro Intellectual Property Gmbh & Co. Kg

Claudia Houben

Dirk Achten

Thomas König

Mathias Matner

Hans-Detlef Arntz

Stephan Schubert

Rainer Bellinghausen

Christian Hahn

Ernst Felske

Frank Behrendt

The invention relates to a continuous method for producing an isocyanurate-containing isocyanate mixture, in which in a step a) a mixture of a first and a second isocyanate component and an isocyanate group trimerization catalyst is provided; in a step b) the mixture obtained in step a) is reacted in a first residence time zone at an elevated temperature; in a step c), the reaction mixture obtained in step b) is further heated in a second residence time zone, optionally after adding a stopper; and in a step d), the reaction mixture obtained in step c) is cooled down in a third residence time zone by way of lowering the temperature, thus obtaining the desired isocyanurate-containing isocyanate mixture.

Method for producing isocyanate mixtures containing isocyanurate groups

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Heinsberg, Germany

Claudia Houben