Expandable polymeric composition and method
AssigneeThe Dow Chemical Company
InventorChung P. Park
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Abstract
An expandable alkenyl aromatic polymer composition and methods of preparation are provided. The composition is admixed with a volatile blowing agent and an expansion aid which includes a polyphenylene ether. The composition may be extruded and then expanded by exposure to steam or hot air or may be impregnated with blowing agent and then expanded.
Claims3
An expanded cellular polymeric composition comprising at least 50% by weight of an alkenyl aromatic polymer and from about 0.06 to about 15.0% by weight of an expansion aid comprising polyphenylene ether, said composition having a density of between about 2.0 to about 16.0 kg/m.sup.3.
Dependencies are inferred from the claim text.