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US 4,791,145 AGranted
Modified flame retardant polyphenylene ether resins having improved foamability and molded articles made therefrom
AssigneeGeneral Electric Company
InventorEric Pressman
Life of this patent
Estimating the term…
Abstract
Polyphenylene ether compositions rendered flame retardant with bromine-containing compounds can be foam molded into shaped articles free of streaking and without the generation of odors if the foaming agent comprises citric acid and sodium bicarbonate.
Claims15
A foamed shaped article having high tensile strength, substantially free of surface streaking and substantially free of odor generation produced by heating and foaming a composition comprising (a) a polyphenylene ether, alone, or in combination with a styrene resin;
- (b) an effective flame retarding amount of a halogenated flame retardant, alone, or in combination with an antimony oxide compound;
- and (c) an effective foam generating amount of a foaming agent comprising citric acid and sodium bicarbonate.
Dependencies are inferred from the claim text.