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US 6,617,365 B2Granted
Use of silicon-polyether copolymers in the production of high resilience polyurethane foams
AssigneeGoldschmidt GmbH
InventorsGeorg Burkhart, Georg Feldmann-Krane, Ingo Fleute-Schlachter, Andreas Weier
Life of this patent
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Abstract
The invention relates to the use of silicone-polyether copolymers of the formula I as surface-active substances in the production of polyurethane foams.
Claims8
A process for preparing a polyurethane foam which comprises reacting a polyol and an isocyanate in the presence of a silicone-polyether copolymer of the formula
- where
- Rf is a polyether radical of the average formula
- —(Y)c[O(CxH2xO)pZ]w,
- where
- c=0 or 1,
- x=2 to 4, with mixtures of the corresponding monomers also being able to be used,
- p≧0,
- w=1 to 4,
- Z=hydrogen atom or a monovalent organic radical,
- Y=a w+1-valent hydrocarbon radical which may also be branched,
- Rg is an alkyl radical or a substituted or unsubstituted aryl radical,
- where
- a is from 0 to 20, with the proviso that c and p must not at the same time be 0.
10 more elements
In a process for preparing a polyurethane foam, the improvement which comprises adding a silicone-polyether copolymer of the formula
- where
- Rf is a polyether radical of the average formula
- —(Y)c[O(CxH2xO)pZ]w,
- where
- c=0 or 1,
- x=2 to 4, with mixtures of the corresponding monomers also being able to be used,
- p≧0,
- w=1 to 4,
- Z hydrogen atom or a monovalent organic radical,
- Y=a w+1-valent hydrocarbon radical which may also be branched,
- Rg is an alkyl radical or a substituted or unsubstituted aryl radical,
- where
- a is from 0 to 20,
- with the proviso that c and p must not at the same time be 0 as a surface active substance.
11 more elements
Dependencies are inferred from the claim text.