Compositions of polyphenylene oxides with EPDM-silicone rubber

Claim 2

A composition comprising: (a) from about 1 to about 15 percent of a graft copolymer of a rubber interpolymer of a mixture of mono-olefins and a polyene with a silicone rubber; (b) from about 30 to about 99 percent by weight of a polyphenylene oxide resin; and (c) from 0 to about 70 percent by weight of a styrene resin having at least 25% polymer units derived from the compound having the formula: ##STR5## wherein R is hydrogen, (lower) alkyl or halogen, Z is hydrogen, halogen, (lower) alkyl or vinyl, and p is a whole integer from 1 to 5.

Claim 3

The composition of claim 1, wherein the rubber interpolymer is an interpolymer of ethylene, an alpha-olefin and a polyene.

Claim 4

The composition of claim 2 wherein the alpha-olefin is propylene.

Claim 5

The composition of claim 1, wherein the silicone rubber is a polyorganosiloxane of the formula: ##STR6## wherein R 1 is alkyl, haloalky, aryl, aralkyl, alkaryl, alkoxy, aryloxy and halogenated derivatives of the aforesaid aryl, aralkyl, alkaryl, alkoxy or aryloxy groups; or alkenyl; R 2 and R 3 are (lower) alkyl, alkenyl, or phenyl; and m is an integer of such value that the polysiloxane is a rubber at ambient temperature.

Claim 6

The composition of claim 1 wherein the polyphenylene oxide is of the formula: ##STR7## wherein the oxygen ether atom of one unit is connected to the benzene nucleus of the next repeating unit, n is a positive integer and is at least 50, and each Q is a monovalent substituent selected from hydrogen, halogen, hydrocarbon radicals being free of a tertiary alpha-carbon atom, halohydrocarbon radicals having at least two carbon atoms between the halogen atom and phenyl nucleus and being free of a tertiary alpha-carbon, atom, hydrocarbonoxy radicals being free of a tertiary alpha-carbon atom and halohydrocarbonoxy radicals having at least 2 carbon atoms between the halogen atom and phenyl nucleus and being free of a tertiary alpha-carbon atom.

Claim 7

The composition of claim 5, wherein the polyphenylene oxide is poly-(2,6-dimethyl-1,4-phenylene)oxide.

Claim 8

The composition of claim 1 wherein the styrene resin is a homopolystyrene.

Claim 9

The composition which comprises: (a) from about 1 to about 15 percent of a graft compolymer of a rubber interpolymer of a mixture of ethylene, propylene and a polyene with a silicone rubber, (b) from about 30 to about 90 percent of poly-(2,6-dimethyl-1,4-phenylene)oxide, and (c) from 0 to about 70 percent of a homopolystyrene.

Claim 10

The composition which comprises: (a) from about 1 to about 15 percent of a graft compolymer of a rubber interpolymer of a mixture of ethylene, propylene and a polyene with a silicone rubber, (b) from about 30 to about 90 percent of poly-(2,6-dimethyl-1,4-phenylene)oxide, and (c) from 0 to about 70 percent of a homopolystyrene.

Claim 11

The composition of claim 1, which contains up to about 30% of a triaryl phosphate.

Claim 12

A molded composition having improved notched Izod impact strength and ductility obtained by molding the composition of claim 1.

Claim 13

A molded composition having improved notched Izod impact strength and ductility obtained by molding the composition of claim 8.

Claim 14

A process for preparing the composition of claim 1, which comprises mixing components (a), (b), and (c) and blending the mixture by extrusion.

Claim 15

A process according to claim 12, wherein the blended product is molded into any desired shape.