Crosslinked styrene polymer foam having suppressed ignition properties
AssigneeThe Dow Chemical Company
InventorsJohn M. Corbett, Richard E. Skochdopole, Anthony L. Scaggs
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Abstract
A monovinylidene aromatic polymer foam having reduced propensity to ignite is produced by (1) foaming a copolymer of monovinylidene aromatic monomer and an ethylenically unsaturated carboxylic anhydride wherein a portion of the copolymer contains halogen moiety and (2) subsequently crosslinking the copolymer foam by contacting it with a crosslinking agent such as alkylene polyamine. The resultant copolymer foam does not melt or drip upon exposure to flame.
Claims12
A non-melting copolymer foam of a monovinylidene aromatic monomer and an ethylenically unsaturated carboxylic anhydride, said copolymer having chemically bonded thereto an amount of a halogenated moiety containing chlorine and/or bromine sufficient to reduce the propensity of the copolymer to propagate combustion, said copolymer containing at least 1 milliequivalent of anhydride moiety per gram of copolymer, and said copolymer being crosslinked with a polyfunctional compound through the anhydride moiety to a degree sufficient to render it non-melting upon exposure to flame.
Dependencies are inferred from the claim text.