Covestro Deutschland Ag

Covestro Intellectual Property Gmbh & Co. Kg

Müller, Christopher

Schedler, Michael

Michael Schedler

Peter Haas

Hartmut Nefzger

Stefan Lindner

Torsten Hagen

Sven Meyer-Ahrens

Stephan Schleiermacher

Peter Nordmann

Lutz Brassat

Persefoni Hilken

Niklas Meine

Joern Beaujean

Karin Clauberg

Ralf Koester, Sr

Michael Baecker

Matthaeus Gossner

Sebastian Koester

Christopher Müller

Rolf Albach

Stefanie Rau

Gernot JÄGER

The invention relates to a method for producing soft polyurethane foam obtained by reacting a composition containing a component A1 containing at least one filled polyol, a component A2 containing compounds reactive with isocyanates and having a hydroxyl value of ≥20 to <100 mg KOH/g, the component A2 not containing any filled polyol, a component A3 containing water and/or at least one physical blowing agent, a component A4 containing auxiliary agents and additives, and a component B containing di- and/or polyisocyanates, characterized in that the reaction occurs in the presence of 0.5 to 3 parts by weight of an organic urea derivative as component C, which is obtained by reacting urea with a difunctional amine having a number-average molecular weight of 200 to 1000 g/mol. The invention also relates to a soft polyurethane foam obtainable by the method.

Polyurethane foam materials having reduced cold-flow effect and method for producing same

The invention relates to a method for producing polyurethane foams by reacting the following components A a polyol component containing A1 40 to 100 parts by weight of polyether carbonate polyol with a hydroxyl number according to DIN 53240-1 June 2013 of 20 mg KOH/g to 120 mg KOH/g, A2 0 to 60 parts by weight of polyether polyol with a hydroxyl number according to DIN 53240-1 June 2013 of 20 mg KOH/g to 250 mg KOH/g and an ethylene oxide content of 0 to 60 wt. %, wherein polyether polyol A2 is free from carbonate units, B B1 a catalyst and B2 optionally auxiliary and additional materials, C water and/or physical blowing agents with D di- and/or polyisocyanates, wherein the production occurs at a characteristic value of 90 to 120, characterised in that the component A contains a component A5 of 0.05 to 10.00 parts by weight of polyester polyol, in relation to the sum of the parts by weight of the components A1+A2=100 parts by weight, said polyester polyol containing units derived from malonic acid.

Polyurethane foams based on polyethercarbonate polyols

Growing community of inventors

Leverkusen, Germany

Michael Schedler