Lanxess Deutschland Gmbh

Covestro Deutschland Ag

Bayer Materialscience Ag

Covestro Intellectual Property Gmbh & Co. Kg

Arlanxeo Deutschland Gmbh

Lars Krueger

Matthias Soddemann

Daniel Gordon Duff

Sigrun Stein

Christoph Gürtler

Hartmut Nefzger

Jörg Hofmann

Aurel Wolf

Arno Nennemann

Michael Traving

Matthias Wohak

Urs Rauwald

Stefanie Braun

Nicole Welsch

Paula Cristina Alves Rodrigues

The invention relates to a method for producing polyether carbonate polyols by adding alkylene oxides and carbon dioxide to an H-functional starter substance in the presence of a double metal cyanide (DMC) catalyst or in the presence of a metal complex catalyst based on the metals zinc and/or cobalt, wherein (&#x3b3;) alkylene oxide and carbon dioxide are added to an H-functional starter substance in a reactor with a total pressure (absolute) of 5 to 120 bar in the presence of a double metal cyanide catalyst or in the presence of a metal complex catalyst based on the metals zinc and/or cobalt, and a reaction mixture containing the polyether carbonate polyol is obtained, (&#x3b4;) the reaction mixture obtained in step (&#x3b3;) remains in the reactor or is optionally continuously transferred to a downstream reactor at a starting total pressure (absolute) of 5 to 120 bar, the content of free alkylene oxide in the reaction mixture being reduced in the course of a downstream reaction in each case, and the total pressure (absolute) can be reduced by up to 50% during the step (&#x3b4;), and (&#x3b6;) the content of highly volatile components of the obtained reaction mixture is thermally reduced at a temperature of 80&#xb0; C. to 200&#xb0; C. The invention is characterized in that (&#x3b5;) the reaction mixture resulting from step (&#x3b4;) is brought to a total pressure (absolute) of &#x2264;2.0 bar, preferably 0.5 bar to 2.0 bar, particularly preferably 0.9 bar to 1.1 bar, prior to step (&#x3b6;) and then left at a temperature of 80 to 180&#xb0; C. for a dwell time of at least 0.5 h. After the dwell time has expired, 5 to 100 ppm of component K is added to the resulting mixture, component K being selected from at least one compound which contains a phosphorus-oxygen-hydrogen group.

Method for producing polyether carbonate polyols

Novel stable aqueous suspensions of a functionalized, completely or partially hydrogenated nitrile rubber are provided with very low emulsifier content and small particle diameter, furtheron a process for production thereof and the use thereof for producing composite materials via coating of substrate materials with the suspension.

Fine-particle, stable suspensions of functionalized, completely or partially hydrogenated nitrile rubbers

Novel stable aqueous suspensions of a functionalized, completely or partially hydrogenated nitrite rubber are provided with very low emulsifier content and small particle diameter, furtheron a process for production thereof and the use thereof for producing composite materials via coating of substrate materials with the suspension.

The present invention relates to innovative nanoparticles, to a process for preparing nanoparticles by recrystallization, and to the use thereof.

Process for preparing dispersible nanoparticles

Growing community of inventors

Leverkusen, Germany

Lars Krueger