Rhodia Chimie

Rhodia Limited

Fr&eacute;d&eacute;ric Leising

Jean-Marie Bernard

Christian Priou

Denis Revelant

Paul-Joel Derian

Fr&eacute;d&eacute;ric Dallemer

The invention concerns a (cyclo)trimerisation method for isocyanates having at least two isocyanate functions, characterised in that it comprises: a) reacting initial isocyanate monomers having at least two isocyanate functions, optionally in the presence of other monomers reactive with the isocyanate monomers having at least two isocyanate functions at a temperature of at least 20&deg; C., advantageously at least 50&deg; C., and lower than 200&deg; C., advantageously lower than 150&deg; C., in the presence of a compound comprising at least one rare earth alcoholate function; b) stopping the reaction by inactivating the catalyst or its derivative forms in the reaction medium at a transformation rate of at least 2.5% and at most 90% of the initial isocyanate functions; and optionally c) distilling the reaction medium to eliminate the unreacted monomers.

Condensation polymerization method for isocyanates

Process for alkoxylation in the presence of rare earth triflimides

Growing community of inventors

Avilly Saint Leonard, France

Frédéric Leising

Growing community of inventors

Avilly Saint Leonard, France

Fr&eacute;d&eacute;ric Leising

Frédéric Leising