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US 7,094,811 B2Granted
Energy absorbing flexible foams produced in part with a double metal cyanide catalyzed polyol
AssigneeBayer Aktiengesellschaft
InventorsNeil H. Nodelman, David A. Radovich, Albert Magnotta, Carl E. Holsinger
Life of this patent
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Abstract
Energy absorbing flexible foams can be produced by reacting an isocyanate with a first polyol, prepared at least in part by an active double metal cyanide catalyst and a second polyether polyol is prepared at least in part by a basic or acidic catalyst.
Claims25
A process for preparing an energy absorbing flexible foam comprising reacting
- a) an organic polyisocyanate with
- b) a polyol blend comprising
- i) at least a first and a second polyol, wherein the first polyol is prepared at least in part by an active double metal cyanide catalyst and has an average functionality of about 2 and wherein the second polyol is prepared at least in part by a basic or acidic catalyst and has an average functionality from about 1.0 to about 6.0
- ii) a blowing agent, and
- iii) at least one catalyst,
- wherein the energy absorbing flexible foam has a sound absorption coefficient of about 0.1 at 250 Hz and about 1.0 at 2000 Hz.
3 more elements
An energy absorbing flexible foam comprising the reaction product of:
- a) an organic polyisocyanate and
- b) a polyol blend comprising
- i) at least a first and a second polyol, wherein the first polyol is prepared at least in part by an active double metal cyanide catalyst and has an average functionality of about 2 and wherein the second polyol is prepared at least in part by a basic or acidic catalyst and has an average functionality from about 1.0 to about 6.0
- ii) a blowing agent, and
- iii) at least one catalyst,
- wherein the energy absorbing flexible foam has a sound absorption coefficient of about 0.1 at 250 Hz and about 1.0 at 2000 Hz.
3 more elements
Dependencies are inferred from the claim text.