US3835200A
Expired / Lapsed
US
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Composition of a polyphenylene ether, a rubber styrene graft copolymer and normally rigid block copolymer of a vinyl aromatic compound and a conjugated diene
Assignee: General Electric Co
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Filing: 1972-08-23
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Granted: 1974-09-10
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Expires: 1992-08-23
Abstract
Abstract There are provided compositions comprising a polyphenylene ether, a graft copolymer of a diene rubber with a styrene monomer and a normally rigid block copolymer of a vinyl aromatic compound and a conjugated diene. The addition of the normally rigid block copolymer resin to polyphenylene ethers in combination with graft copolymers of a diene rubber and a styrene monomer provides unexpected improvements in toughness in parts molded from the composition. Such properties are improved without substantially impairing glass or surface appearance.
Inventors
- 👤 G Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:47
CPC Classifications
C; C08; C08L; C08L51/00; C08L51/04; C08L53/00; C08L53/02; C08L71/00; C08L71/08; C08L71/10; C08L71/12; C08L71/123; Y; Y10; Y10S; Y10S525/00; Y10S525/901; Y10S525/905
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
16 words
A composition as defined in claim 1 wherein said polyphenylene ether resin is of the formula
Claim 2
Dependent Claim
19 words
A composition as defined in claim 2 wherein each Q is alkyl having from 1 to 4 carbon atoms.
Claim 3
Dependent Claim
12 words
A composition as defined in claim 2 wherein each Q is methyl.
Claim 4
Dependent Claim
29 words
A composition as defined in claim 1 wherein, in component (b), (A) is a styrene block, (B) is a butadiene block, the polymer being of the radial teleblock structure.
Claim 5
Dependent Claim
46 words
A composition as defined in claim 5 wherein, in component (b), the aromatic compound units comprise from about 65 to about 85 percent by weight and the diene units comprise from about 15 to about 45 percent by weight of said block copolymer or mixture thereof.
Claim 6
Dependent Claim
18 words
A composition as defined in claim 1 wherein component (a) comprises i. a polyphenylene ether of the formula
Claim 7
Dependent Claim
41 words
A composition as defined in claim 7 wherein the diene rubber comprises a butadiene rubber or a rubbery copolymer of butadiene and styrene in an amount of from about 4 to about 12 percent by weight of said grafted interpolymerization product.
Claim 8
Dependent Claim
13 words
A composition as defined in claim 7 wherein the polyphenylene ether is poly(2,6-dimethyl-1,4-phenylene)ether.
Claim 9
Dependent Claim
82 words
A composition as defined in claim 1 wherein said polyphenylene ether is poly(2,6-dimethyl-1,4-phenylene)ether and comprises from about 20 to about 90 percent by weight, the normally rigid block copolymer comprises styrene and butadiene and is of the poly(styrene-butadiene) type and comprises from about 10 to about 80 percent by weight and the grafted interpolymerization product is of styrene monomer and polybutadiene and comprises from 10 to about 60 percent by weight of the total weight of the resinous components in said composition.
Claim 10
Dependent Claim
15 words
A reinforced composition as defined in claim 1 including a reinforcing amount of fibrous glass.
Claim 11
Dependent Claim
103 words
A composition as defined in claim 1 wherein said polyphenylene ether is poly(2,6-dimethyl-1,4-phenylene) ether and comprises from about 20 to about 90 percent by weight, the normally rigid block copolymer comprises styrene and butadiene and is of the poly(styrene-butadiene) type and comprises from about 10 to about 80 percent by weight and the grafted interpolymerization product is of styrene monomer and polybutadiene and comprises from 10 to about 60 percent by weight of the total weight of the resinous components in said composition, wherein said grafted interpolymerization product is comprised of from about 4 to about 12 percent by weight of said polybutadiene.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |