Composition of a polyphenylene ether, a block copolymer of a vinyl aromatic compound and a conjugated diene and a polyolefin
AssigneeGeneral Electric Company
InventorGim F. Lee, Jr.
Life of this patent
Estimating the term…
Abstract
There are provided compositions comprising a polyphenylene ether and a synergistic combination comprising an elastomeric block copolymer of a vinyl aromatic compound and a conjugated diene and a polyolefin resin, optionally containing a styrene homopolymer or random copolymer resin. The addition of the combination of elastomeric block copolymer resin and polyolefin resin to polyphenylene ethers or mixtures of polyphenylene ethers and such polystyrenes provides unexpected improvements in toughness in parts molded from the composition, in comparison with compositions containing either the block copolymer or the polyolefin resin alone.
Claims19
A thermoplastic composition, having high impact strength, comprising
- (a) a polyphenylene ether resin or a composition comprising a polyphenylene ether resin and a styrene homopolymer or random copolymer resin and
- (b) a synergistic, impact strength-improving combination comprising (i) an elastomeric, hydrogenated block copolymer of a vinyl aromatic compound (A) and (A).sup.1 and a conjugated diene (B), of the A--B--A.sup.1 type, the center block B being of higher molecular weight than that of the combined terminal blocks A and A.sup.1 and (ii) a polyolefin resin, component (b) being present in an amount of from about 5 to about 30% by weight of the total resinous components of the composition.
Dependencies are inferred from the claim text.