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US 4,064,104 AGranted
Phosphine oxide flame retardants
AssigneeE. I. Du Pont de Nemours and Company
InventorJoseph J. Mrowca
Life of this patent
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Abstract
Aromatic phosphine oxide compounds are useful as flame retardants in synthetic polymers and textiles. Exemplary is 2,4,6-trimethylmesitylylenetris(diphenylphosphine oxide).
Claims6
A flame-retardant compound having the formula ##STR29## wherein R and R.sup.1 individually are alkyl, aryl or aralkyl of up to 10 carbon atoms having up to 5 chlorine, bromine or fluorine atoms;
- X is SO.sub.2 NH.sub.2, SO.sub.2 NHR or SO.sub.2 NR.sub.2, R being as defined above;
- a is 1 to 4;
- b is 2 to 5;
- and a + b is 3 to 6.
1 more element
Dependencies are inferred from the claim text.