PRODUCTION OF FLAME-RETARDANT, ISOCYANATE-BASED RIGID FOAMS

摘要

A process for producing isocyanate-based, flame-retardant rigid foams by reacting a) organic and/or modified organic polyisocyanates with b) at least one higher-molecular-weight compound having at least two reactive hydrogen atoms and, if desired c) low-molecular-weight chain extenders and/or crosslinkers in the presence of d) flame retardants, e) water, f) blowing agents and g) other auxiliaries and/or additives, comprises using, as blowing agents, a mixture of at least one hydrocarbon which is liquid at room temperature and has 5 or more carbon atoms in the molecule with at least one hydrocarbon which is gaseous at room temperature and has 4 or fewer carbon atoms in the molecule.