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US 4,094,926 AGranted
Polymeric phosphorus compounds and flame retardant polyethyleneterephthalate containing said polymers
AssigneeImperial Chemical Industries PLC
InventorsDennis Richard Sheard, Ian Stuart Fisher
Life of this patent
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Abstract
Phosphorus-containing compounds of the formula ##STR1## WHEREIN R is phenyl or alkyl of 1 to 4 carbon atoms, m and p are each integers from 2 to 6, n and q are each integers from 1 to 10, y is an integer of at least 2, and flame retardant polymers containing such phosphorus-containing compounds.
Claims12
A phosphorus-containing compound of the formula:
- ##STR9## wherein R is phenyl or alkyl of 1 to 4 carbon atoms. m and p are each independently integers from 2 to 6,
- n and q are each independently integers from 1 to 10,
- y is an integer of at least 2.
A compound of the formula:
- ##STR10## wherein y is an integer of at least 2.
Dependencies are inferred from the claim text.