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US 3,986,990 AGranted
Flame retardant polyurethane foam containing polyalkylene glycol alkyl poly-phosphites
AssigneeStauffer Chemical Company
InventorSilvio L. Giolito
Life of this patent
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Abstract
Polyalkylene glycol alkyl polyphosphites characterized by low OH numbers and relatively little glycol in the side chain are prepared by reacting a tertiary phosphite with a polyalkylene glycol in a molar ratio of from about 1 to 1.5 moles of phosphite per mole of glycol. These polyphosphites have wide utility as intermediates in the preparation of flame retardants suitable for use in flexible urethane foams.
Claims4
A flame retardant polyurethane foam containing, as a chemically bonded, integral part thereof, the residue of a polyalkylene glycol polyphosphite having the formula:
- ##EQU6## wherein R.sub.1 is an alkyl residue, R is a polyalkylene glycol residue and n is a number from about 4 to about 50.
Dependencies are inferred from the claim text.