Claims
- 1. 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.
- 2. The composition of claim 1 in which said alkenyl aromatic polymer is selected from the group consisting of polystyrene and copolymers of styrene or vinyl toluene and monomers copolymerizable therewith.
- 3. The composition of claim 1 in which said expansion aid further comprises from about 0.11% to about 27.5% by weight rubber-containing polystyrene and from about 0.03% to about 7.5% by weight aromatic phosphate.
CROSS-REFERENCE TO RELATED APPLICATION
This is a continuation of pending prior application Ser. No. 940,124 filed Mar. 9, 1987 now U.S. Pat. No. 4,705,811 which is a divisional of 835,133 filed Apr. 7, 1986 now U.S. Pat No. 4,661,302.
US Referenced Citations (2)
Divisions (1)
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835133 |
Apr 1986 |
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Continuations (1)
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940124 |
Mar 1987 |
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