Patent US4442251A successfully refreshed from Google Patents.
US4442251A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impact resistant polyphenylene ether resin compositions
Assignee: General Electric Co
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Filing: 1982-03-04
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Granted: 1984-04-10
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Expires: 2002-03-04
Abstract
Abstract Compositions of polyphenylene ether resin, optionally containing an impact modifier are modified by incorporation of small amounts of a copolymer of ethylene and methyl acrylate. The resultant blends are moldable into articles having better Gardner (falling dart) impact strength than corresponding compositions similarly modified with low density polyethylene, without detriment to other important physical properties of the compositions.
Inventors
- 👤 William R. Haaf
- 👤 Gim F. Lee, Jr.
- 👤 Sei P. Ting
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:34
CPC Classifications
C; C08; C08L; C08L71/00; C08L71/08; C08L71/10; C08L71/12; C08L71/123
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
37 words
A thermoplastic composition, comprising an admixture of: (a) a blend of a polyphenylene ether resin and a rubber modified high impact polystyrene; and (b) an impact strength enhancing amount of a copolymer of ethylene and methyl acrylate.
Claim 2
Dependent Claim
37 words
A thermoplastic composition, comprising an admixture of: (a) a blend of a polyphenylene ether resin and a rubber modified high impact polystyrene; and (b) an impact strength enhancing amount of a copolymer of ethylene and methyl acrylate.
Claim 3
Dependent Claim
14 words
A composition according to claim 1, in which the polyphenylene ether is poly(2,6-dimethyl-1,4-phenylene ether).
Claim 4
Dependent Claim
25 words
A composition according to claim 1, in which the ethylene-methyl acrylate copolymer has a methyl acrylate content of from about 10 to 25% by weight.
Claim 5
Dependent Claim
29 words
A composition according to claim 1, in which the polyphenylene ether resin and the rubber modified high impact polystyrene are present in a weight ratio between 20:1 and 1:20.
Claim 6
Dependent Claim
29 words
A composition according to claim 4, in which the polyphenylene ether resin and the rubber modified high impact polystyrene are present in a weight ratio between 4:1 and 1:2.
Claim 7
Dependent Claim
36 words
A composition according to claim 1, which contains from about 0.1 to 5 parts by weight of the ethylene-methyl acrylate copolymer, based on 100 parts of the polyphenylene ether and rubber modified high impact polystyrene combined.
Claim 8
Dependent Claim
17 words
A composition according to claim 1, which includes a flame retardant amount of a flame retardant agent.
Claim 9
Dependent Claim
15 words
A composition according to claim 7, in which the flame retardant agent is triphenyl phosphate.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-04-10 | 1987-10-10 | 1988-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-10 | 1991-10-10 | 1992-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-10 | 1995-10-10 | 1996-04-10 | $7700.00 | Window Closed / Lapsed |