US4255321A
Expired / Lapsed
US
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Stabilized polyphenylene ether
Assignee: General Electric Co
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Filing: 1970-01-02
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Granted: 1981-03-10
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Expires: 1990-01-02
Abstract
Abstract A stabilized polymer composition comprising a blend of a poly-(2,6-dialkyl-1,4-phenylene) ether and a polystyrene stabilized with an inorganic sulfide alone or in combination with an organic phosphite. The combination of the sulfide and the phosphite appears to provide a synergism resulting in substantially increased resistance to oxygen containing atmospheres.
Inventors
- 👤 Reinier W. Brussen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:19
CPC Classifications
C; C08; C08L; C08L25/00; C08L25/02; C08L25/04; C08L25/06; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K3/30; C08L51/00; C08L51/04; C08L71/00; C08L71/08; C08L71/10; C08L71/12; C08L71/123
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
59 words
A stabilized polyphenylene ether composition comprising from 40 to 60 parts by weight of poly-(2,6-dimethyl-1,4-phenylene)ether, from 40 to 60 parts of a high impact strength polystyrene, at least 0.01 percent by weight of an inorganic metal sulfide and also containing zinc oxide in an amount of from 0.1 to 1.0 parts by weight per 100 parts of the composition.
Claim 2
Dependent Claim
59 words
A stabilized polyphenylene ether composition comprising from 40 to 60 parts by weight of poly-(2,6-dimethyl-1,4-phenylene)ether, from 40 to 60 parts of a high impact strength polystyrene, at least 0.01 percent by weight of an inorganic metal sulfide and also containing zinc oxide in an amount of from 0.1 to 1.0 parts by weight per 100 parts of the composition.
Claim 3
Dependent Claim
72 words
A stabilized polymer composition comprising a polyphenylene ether which corresponds to the formula: ##STR3## where the oxygen ether atom of one unit is connected to the benzene nucleus of the next adjoining unit, n is a positive integer and is at least 100, and each Q is lower alkyl and a polystyrene, the composition containing a stabilizing quantity of an inorganic metal sulfide in combination with an organic phosphite and zinc oxide.
Claim 4
Dependent Claim
72 words
A stabilized polymer composition comprising a polyphenylene ether which corresponds to the formula: ##STR3## where the oxygen ether atom of one unit is connected to the benzene nucleus of the next adjoining unit, n is a positive integer and is at least 100, and each Q is lower alkyl and a polystyrene, the composition containing a stabilizing quantity of an inorganic metal sulfide in combination with an organic phosphite and zinc oxide.
Claim 5
Dependent Claim
70 words
A stabilized polymer composition comprising a polyphenylene ether which corresponds to the formula: ##STR4## where the oxygen ether atom of one unit is connected to the benzene nucleus of the next adjoining unit, n is a positive integer and is at least 100, and each Q is lower alkyl and a polystyrene, the composition containing a stabilizing quantity of zinc sulfide in combination with an organic phosphite and zinc oxide.
Claim 6
Dependent Claim
70 words
A stabilized polymer composition comprising a polyphenylene ether which corresponds to the formula: ##STR4## where the oxygen ether atom of one unit is connected to the benzene nucleus of the next adjoining unit, n is a positive integer and is at least 100, and each Q is lower alkyl and a polystyrene, the composition containing a stabilizing quantity of zinc sulfide in combination with an organic phosphite and zinc oxide.
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) | 1984-03-09 | 1984-09-08 | 1985-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-09 | 1988-09-08 | 1989-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-09 | 1992-09-08 | 1993-03-10 | $7700.00 | Window Closed / Lapsed |