Claims
- 1. A thermoplastic molding composition which comprises:
- (a) from 40-95 parts by weight of a copolymer of a vinyl aromatic compound and an .alpha.,.beta.-unsaturated cyclic anhydride;
- (b) from 10-50 parts by weight of a block copolymer of the A'-B'-A' type wherein A' is a polymerized mono-alkenyl aromatic hydrocarbon block and B' is a polymerized conjugated diene hydrocarbon block, the block B' being of higher molecular weight than that of the combined molecular weight of terminal block A'; and
- (c) from 5-30 parts by weight of a polyphenylene ether resin.
- 2. A composition as defined in claim 1 wherein said composition includes from 5-20 parts by weight of a polyphenylene ether resin of the formula: ##STR3## wherein the oxygen ether atom of one unit is connected to the phenylene nucleus of the next adjoining unit; n is an integer of at least 50; and each Q is a monovalent substituent selected from hydrogen, halogen, hydrocarbon radicals and halohydrocarbon radicals having at least two carbon atoms between the halogen and the phenyl nucleus.
- 3. A composition as defined in claim 2 wherein the polyphenylene ether resin is poly(2,6-dimethyl-1,4-phenylene) ether resin.
- 4. A composition as defined in claim 3 wherein A' of the block copolymer is a polymerized mono-alkenyl aromatic hydrocarbon block having a molecular weight of 2,000-100,000 and B' is a polymerized conjugated diene hydrocarbon block having a molecular weight of from 25,000-1,000,000.
- 5. A composition as defined in claim 4 wherein block A' is derived from styrene and block B' is derived from butadiene.
- 6. A composition as defined in claim 1 wherein 0% of the polyphenylene ether is present.
Parent Case Info
This is a continuation of application Ser. No. 477,435 filed June 7, 1974, now U.S. Pat. No. 4,124,654.
US Referenced Citations (5)
Foreign Referenced Citations (2)
Number |
Date |
Country |
1053596 |
Jan 1967 |
GBX |
1120404 |
Jul 1968 |
GBX |
Continuations (1)
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Number |
Date |
Country |
Parent |
477435 |
Jun 1974 |
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