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US 4,026,838 AGranted
Smoke-suppressant additives for polyphosphazenes
AssigneeArmstrong Cork Company
InventorsRonald L. Dieck, Edwin J. Quinn
Life of this patent
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Abstract
Smoke suppressant additives for poly(aryloxyphosphazene) homopolymers, copolymers and foams thereof are described. Smoke suppression occurs by the incorporation of an effective amount of a normally solid carboxylic acid.
Claims14
A smoke suppressed poly(aryloxyphosphazene) foam composition comprising a poly(aryloxyphosphazene) foam material;
- and incorporated in said foam in an amount sufficient to reduce the smoke levels of said foam when burned, a normally solid carboxylic acid.
A poly(aryloxyphosphazene) smoke suppressed foam composition comprising
- (a) an aryloxyphosphazene homopolymer or copolymer of the formula ##STR6## wherein R.sub.1 and R.sub.2 are the same or different and are hydrogen, a C.sub.1 -C.sub.10 linear or branched alkyl radical or a C.sub.1 -C.sub.4 linear or branched alkoxy radical, said R.sub.1 and R.sub.2 substituted in any sterically permissible position on the phenoxy group;
- and
- (b) a normally solid carboxylic acid.
Dependencies are inferred from the claim text.