Covestro Deutschland Ag

Covestro Intellectual Property Gmbh & Co. Kg

Stratasys, Inc.

Jan Suetterlin

Dirk Achten

Frank Richter

Marc-Stephan Weiser

Sebastian Dörr

Heike Heckroth

Thomas Buesgen

Sascha Plug

Ian Teasdale

Claudine Stoye

Andy Honour

Jeff Motley

Oliver Plavcan

Anne Fischer

Jeffrey Motley

Christoph Ulbricht

Oliver Brueggemann

Jan-Patrick Bachmann

Susanne Kimeswenger

Florian Hartmann

Method for adjusting the volumetric flow ratio of at least two different fluids (F, F) with a control-device. The control-device comprises a first chamber with a chamber-volume (V) for the first fluid (F) and an inlet-element and an outlet-element for the first fluid (F) and at least one rotating or nutating element. The control-device further comprises at least one second chamber with a chamber-volume (V) for the second fluid (F), wherein the second chamber has an inlet-element and an outlet-element for the second fluid (F) and at least one rotating or nutating element. The rotating or nutating elements are coupled so as to rotate or nutate at a defined rotational or nutational frequency ratio and are driven by the fluids (F, F). The chamber volume ratio (V:V) and the rotational or nutational frequency ratio are selected such that the fluids (F, F) flowing out of the outlet-elements have a predefined volumetric flow ratio. The input resistor (R) of the respective inlet-element and the output resistor (R) of the respective outlet-element of the first chamber and/or the second chamber are chosen so as to satisfy the equation: (I), wherein ηis the viscosity of the respective fluid (F, F) and Cn designates the respective chamber.

Method for adjusting the volumetric flow ratio of at least two different fluids

The invention provides a process for producing polyurethane foams, in which compositions comprising

Process for producing elastic and tear-resistant polyurethane foams and uses

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Cologne, Germany

Jan Suetterlin