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US 5,177,116 AGranted
Flexible polyurethane foams with reduced dripping during burning
AssigneeBASF SE
InventorsManfred Genz, Andreas Rothacker
Life of this patent
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Abstract
The invention pertains to drip retardant flexible polyurethane foams prepared by the reaction of an isocyanate with a polyol resin containing a drip retardant made of either a trialkyl end-capped amine functional silicone polymer or a trialkly end-capped carbinol functional silicone polymer to effectively prevent the foam from dripping while burning and encourage char formation.
Claims11
A drip retardant flexible polyurethane foam obtained by reacting a polyol resin comprising:
- a) a polyol;
- b) a blowing agent;
- c) a drip retardant;
- d) a urethane promoting catalyst;
- and optionally,
- e) a surfactant, a chain extender, and/or a flame retardant;
- with an organic polyisocyanate, said drip retardant having the following formula:
- ##STR5## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, and R.sub.5 are each selected from the group consisting of alkly radicals having 1-4 carbon atoms and aryl radicals;
- Z is selected from the group consisting of OH and NH.sub.2 ;
- x ranges from 10 to 200;
- and y ranges from 2 to 50.
8 more elements
Dependencies are inferred from the claim text.