Patent ID: 6166098
Filing Date: 2000-12-26
Classification: C08G,C08J

Abstract:
A composition for making a polyurethane foam comprising the polymer reactants for making said foam including a foam stabilizer which comprises a mixture of at least two organically modified polysiloxanes of the formula ##STR2## in which the radicals R.sup.1 are alkyl radicals or aryl radicals,R.sup.2 are R.sup.1 and/or R.sup.3 and/or R.sup.4 wherein at least one R.sup.2 is not R.sup.1,R.sup.3 is a polyether radical of the formula II--(Y).sub.e, [O(C.sub.2 H.sub.4-d R'.sub.d O).sub.m (C.sub.x H.sub.2x O).sub.p Z].sub.w, with the proviso thate=0 or 1,w=1 to 4,d=1 to 3,m.gtoreq.1,x=2 to 4, obtainable by using C.sub.2 H.sub.4 O, C.sub.3 H.sub.6 O and C.sub.4 H.sub.8 O units either individually or in combination, andp.gtoreq.1, andY is a (w+1)-valent hydrocarbon radical, which can also be branched,R' is selected from the group consisting of monovalent aromatic or nonaromatic hydrocarbon radicals from C.sub.3 to C.sub.18,Z is hydrogen or a monovalent organic radical, the sum m+p=1 to 150,R.sup.4 is a polyether radical of the formula III--(F).sub.f [O(C.sub.x H.sub.2x O).sub.r Z].sub.g, with the proviso thatf=0 or 1,x=2 to 4, obtainable by using C.sub.2 H.sub.4 O, C.sub.3 H.sub.6 O and C.sub.4 H.sub.8 O units either individually or in combination,g=1 to 4 andr.gtoreq.1,F is a (g+1)-valent hydrocarbon radical, which can also be branched,a is a number from 1 to 100 if b is a number from 6 to 8,a is a number from 1 to 200 if b is a number from 3 to 6,a is a number from 1 to 300 if b is a number from 0 to 3,b=0 to 8,subject to the condition that in at least one of the silicone copolymer components of the mixture both e and f are 1 and in at least one of the silicone components of the mixture either e or f is 0.