Bayer Intellectual Property Gmbh

Covestro Deutschland Ag

Yvonne Dienes

Christoph Gürtler

Walter Leitner

Thomas Ernst Müller

Burkhard Köhler

Julien Barruet

Anthony Kermagoret

Aurel Wolf

Christoph Guertler

Stefan Grasser

Igor Busygin

Thoams Ernst Mueller

The present invention relates to a process for the activation of double metal cyanide (DMC) catalysts with heterocumulenes for the preparation of polyether carbonate polyols by catalytic copolymerization of carbon dioxide (CO) with alkylene oxides in the presence of one or more H-functional starter substances, and to a process for the preparation of polyether carbonate polyols from one or more H-functional starter substances, one or more alkylene oxides and carbon dioxide in the presence of a double metal cyanide catalyst, characterized in that

Method for activating double metal cyanide catalysts for the production of polyether carbonate polyols

The present invention relates to a method for producing polyetherester carbonate polyols by means of catalytic addition of carbon dioxide, alkylene oxides and cyclic anhydrides to H-functional starter compounds in the presence of double metal cyanide (DMC) catalysts.

Method for producing polyetherester carbonate polyols

The invention relates to a process for the preparation of polycarbonate polyols, characterized in that cyclic carbonates are polymerized in the presence of DMC catalysts and chain-transfer agents consisting of polyether carbonate polyols.

Method for producing polycarbonate polyols by the immortal polymerization of cyclic carbonates

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Hannover, Germany

Yvonne Dienes