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US 7,122,135 B2Granted
Blend of organophosphorus flame retardant, lactone stabilizer, and phosphate compatibilizer
AssigneeSupresta U.S. LLC
InventorsBarbara A. Williams, Lambertus A. DeKleine
Life of this patent
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Abstract
A flame retardant blend, suitable for incorporation into a polyurethane foam, comprises: an oligomeric organophosphourus flame retardant, preferably an organophosphate, having a phosphorus content of no less than about 10%; a benzofuran-2-one stabilizer; and a monomeric phosphate ester containing alkyl and/or haloalkyl groups to act as a solubilizing addtive for the oligomeric organophosphorus flame retardant and benzofuran-2-one stabilizer.
Claims10
A flame retardant composition which comprises:
- from about 60% to about 98%, by weight of the flame retardant composition, of an oligomeric organophosphorus flame retardant which is a phosphate ester containing at least three phosphate ester units therein;
- from about 0.05% to about 1.0%, by weight of the flame retardant composition, of a benzofuran-2-one stabilizer;
- and from about 1% to about 40%, by weight of the flame retardant composition, of a monomeric phosphate ester compatibilizer.
A flame retardant composition which comprises:
- from about 80% to about 98%, by weight of an oligomeric organophosphorus flame retardant which is a phosphate ester containing at least three phosphate ester units therein;
- from about 0.05% to about 1.0%, by weight of a benzofuran-2-one stabilizer;
- and from about 1% to about 40%, by weight of a monomeric phosphate ester compatibilizer.
Dependencies are inferred from the claim text.