| abstract |
The invention relates to flamep-roofed polyurethane hard foam material or polyurethane/polyisocyanurate hard foam material (designated below individually or jointly also as "PUR/PIR hard foam material") comprising phosphinates (also hypophosphite), and to a method for producing PUR/PIR hard foam materials through the implementation of a reaction mixture containing A1 an isocyanate-reactive component, A2 propellant, A3 catalyst, A4 optionally additive, A5 flame-proofing agent, B an isocyanate component, characterised in that the flame-proofing agent A5 contains a phosphine according to the formula (I) M[(R)2PO2]n, where R = in each case stands for H, C1- to C4-(hydroxy-)alkyl group or benzyl group, M = an element of the main groups 1 to 3, wherein hydrogen is excepted, and n = the number of the main group of M, and the proportion of the phosphine according to the formula (I) is 0.1 to 15 wt%, based on the total mass of components A1 to A5. |