Covestro Deutschland Ag

Covestro Intellectual Property Gmbh & Co. Kg

Michael Baecker

Hartmut Nefzger

Stefan Lindner

Reinhard Albers

Marcel Schornstein

Torsten Hagen

Dirk Hinzmann

Paul Heinz

Peter Nordmann

Christian Hahn

Persefoni Hilken

Niklas Meine

Michael Schedler

Ali-Kasim Anwar

Sebastian Scherf

Gernot JÄGER

The invention relates to a process used to produce open-cell and extremely fine-cell PUR/PIR rigid foams, said process using a polyol formulation comprising a specific isocyanate-reactive component, a catalyst component having zerewitinoff-active hydrogens and a cell-opener component.

Polyurethane foam and process 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

Korschenbroich, Germany

Michael Baecker