Patent ID: 8034848

Claim:
A low-viscosity aqueous hot-cure flexible polyurethane foam stabilizer solution which has a viscosity of ≧100 mPa·s to ≦5000 mPa·s and is for the production of hot-cure flexible polyurethane foams, wherein the low-viscosity aqueous hot-cure flexible polyurethane foam stabilizer solution comprises the following components: ≧40% to ≦70% by weight of polyethersiloxane, ≧0.5% to ≦20% by weight of organic surfactant, ≧10% by weight of water, ≧0% by weight of organic solvent additions, in which the polyethersiloxane has the following formula (I) R 1 —Si(CH 3 ) 2 O—[Si(CH 3 )(OSi(CH 3 ) 2 R 0 )O—] u —[Si(OSi(CH 3 ) 2 R 0 ) 2 O—] v —[Si(CH 3 ) 2 O—] w —[SiCH 3 R 2 O—] x —[SiCH 3 R 3 O—] y —[SiCH 3 R 4 O] z —[SiR 3 R 4 O] t —Si(CH 3 ) 2 —R 5 (I) in which R 0 =—O—[Si(CH 3 ) 2 O—] w —[SiCH 3 R 2 O—] x —[SiCH 3 R 3 O—] y —[SiCH 3 R 4 O] z —Si(CH 3 ) 2 —R 5 , R 1 , R 2 , R 3 , R 4 and R 5 =identically to or differently from one another in each case an alkyl or aryl radical of 1 to 12 carbon atoms or in each case —CH 2 —R 6 or —CH 2 —CH 2 —R 6 or polyalkylene oxide polyether of the formula (II) —C m H 2m O(C 2 H 4 O) a (C 3 H 6 O) b (C 4 H 8 O) c (C 6 H 5 —C 2 H 3 O) d (C 12 H 24 O) 9 R 7 (II), R 6 =H, —C 6 H 5 , —CN, -alkyl with C 1 to C 10 , —CH—CH 2 O (epoxide ring), -alkyl-OH, -aryl-OH, —Cl, —OH, —R 8 —O—R 9 , —R 8 —O—CO—R 9 or a divalent bridge to a further siloxane radical, selected from the group consisting of alkylene, —R 8 —O—R 9 —, —R 8 —COO—R 9 , —R 8 —O—R 9 —O—R 8 —, —R 8 —COO—R 9 —OOC—R 8 —, —R 8 —OOC—R 9 —COO—R 8 —, R 7 =H, alkyl, acyl, acetyl or aryl radical, alkyl- or aryl-urethane group or a diva lent bridge to a further siloxane radical, selected from the group consisting of alkylene, —R 8 —O —R 9 —, —R 8 —COO—R 9 , —R 8 —O—R 9 —O—R 8 —, —R 8 —COO—R 9 —OOC—R 8 —, —R 8 —OOC—R 9 —COO—R 8 —, R 8 =alkyl- or aryl-, R 9 =alkyl- or aryl-, u=0 to 5, v=0 to 5, t=0 to 15, w=15 to 130, x=0 to 15, y=0 to 15, z=0 to 15, m=0 to 4, a=≧0 to ≦160, b=≧0 to ≦140, c=≧0 to ≦50, g=≧0 to ≦50, d=0 to ≦50, it being the case that a+b+c+d+g≧ 10, wherein at least one polyether unit has an average molar mass, M n ≧2100 g/mol; with the proviso that x+y+z+t≧3, and that at least one substituent R 1 , R 2 , R 3 , R 4 , and R 5 is a polyether of the formula II, the weight fraction of the aforementioned components being selected such that the overall weight fraction of the components does not exceed 100% by weight, based on the hot-cure flexible polyurethane foam stabilizer solution.