FLAME RESISTANT RIGID POLYURETHANE FOAMS BLOWN WITH HYDROFLUOROCARBONS
First Claim
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1. A foam forming composition comprising:
- a) an organic isocyanate, b) an isocyanate reactive composition containing at least 40% by weight based on the total weight of the isocyanate reactive composition of an aromatic polyester polyol having an average functionality of less than 3, c) a C1 to C4 hydrofluorocarbon blowing agent, and d) an organic phosphorus compound.
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Abstract
Rigid polyurethane foams having improved flame resistance are disclosed. The foams are prepared from a composition containing (a) an isocyanate, (b) an isocyanate reactive composition containing an aromatic polyester polyol, (c) an organo phosphorus compound and (d) a C1 to C4 hydrofluorocarbon.
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Citations
30 Claims
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1. A foam forming composition comprising:
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a) an organic isocyanate, b) an isocyanate reactive composition containing at least 40% by weight based on the total weight of the isocyanate reactive composition of an aromatic polyester polyol having an average functionality of less than 3, c) a C1 to C4 hydrofluorocarbon blowing agent, and d) an organic phosphorus compound. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification