Covestro Deutschland Ag

Covestro Intellectual Property Gmbh & Co. Kg

Persefoni Hilken

Hartmut Nefzger

Aurel Wolf

Stefan Lindner

Urs Rauwald

Markus Meuresch

Michael Baecker

Michael Schedler

Antje Wehlau

Rolf Albach

A process for producing rigid PUR/PIR foams via the reaction of a reaction mixture comprising A1 an isocyanate-reactive component, A2 a flame retardant, A3 a blowing agent, A4 a catalyst, and A5 optionally auxiliaries and additives with B an organic polyisocyanate component. Component A1 comprises a diurethane diol A1.1 and a compound A1.2 selected from the group consisting of polyether polyol, polyester polyol, polyether carbonate polyol, and polyether ester polyol. Also disclosed is a rigid PUR/PIR foam, an insulating material, a composite element, and a mixture.

Flame-retardant polyurethane rigid foams

A process for producing rigid PUR/PIR foams comprising A1 an isocyanate-reactive component, A2 a flame retardant, A3 a blowing agent, A4 a catalyst, A5 optionally auxiliaries and additives, and B an organic polyisocyanate component. Component A1 comprises a triurethane triol A1.1 and a compound A1.2 selected from the group consisting of polyether polyol, polyester polyol, polyether carbonate polyol, and polyether ester polyol. Also disclosed is a rigid PUR/PIR foam, an insulating material, a composite element, and a mixture.

Flame-retarded rigid polyurethane foams

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

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Cologne, Germany

Persefoni Hilken