A method for the production of polyurethane - hard - or half hard foam materials and composite elements containing such polyurethane - foams

摘要

the subject of the invention is a process for the production of polyurethane hartschaumstoffen, preferably of polyurethane halbhartschaumstoffen,through the implementation of $(a) organic and / or modified organic polyisocyanaten with $a (b) hu00f6hermolekularen polyhydroxylverbindungen and, where appropriate, $a (c) low molecular weight kettenverlu00e4ngerungs and / or vernetzungsmitteln $a $a (d) in the presence of water or mixture of water and evalu forward acting foaming (a) $a (e) where appropriate, catalysts $a (f) at least one additiveselected from at least one compound of the formulas (f1) to (f4) $f1 and f2 in which mean $a $r1 and r2 linear or branched alkylreste with 1 to 32 c atoms, x $a is a whole number from 1 to 35 and $a mu of sodium, potassium, ammonium, calcium and magnesium with the provided that the number of cations and anions is compensated.$a and, if necessary, other additives and the additional $a (g) where appropriate, $a and $b "interconnection elements, consisting of $a $a) at least one layer and (b) at least one layer of a polyurethane hard or halbhartschaumstoff produced after the erfindungsgemu00e4u00dfen procedures.