US3761541A
Expired / Lapsed
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Stabilized polyphenylene ethers
Assignee: General Electric Co
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Filing: 1971-10-12
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Granted: 1973-09-25
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Expires: 1991-10-12
Abstract
Abstract A stabilized polyphenylene ether composition consisting of a major portion of a polyphenylene ether or a blend of a polyphenylene ether and a second resinous component and a minor portion of a stabilizer combination comprising an alkanolamine alone or in combination with an inorganic sulfide, an organic phosphite and mixtures thereof. A preferred composition comprises a blend of a poly(2,6-dialkyl1,4-phenylene)ether and a polystyrene stabilized with a mixture of the alkanolamine, organic phosphite and inorganic sulfide as the combination of stabilizers appears to provide a synergism resulting in substantially increased resistance to oxygen containing atmospheres. Oxides of metals such as zinc may be added to the compositions which contain inorganic sulfides to provide additional stability.
Inventors
- 👤 A Katchman
- 👤 R Summers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:19
CPC Classifications
C; C08; C08L; C08L25/00; C08K; C08K13/00; C08K13/02
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
17 words
A stabilized polymer composition as defined in claim 1 wherein the polyphenylene ether component is a poly(2,6-dialkyl-1,4-phenylene)ether.
Claim 2
Dependent Claim
15 words
A stabilized polymer composition as defined in claim 2 in admixture with a polystyrene resin.
Claim 3
Dependent Claim
19 words
A stabilized polymer composition as defined in claim 3 wherein said polystyrene resin is a high impact polystyrene resin.
Claim 4
Dependent Claim
35 words
A stabilized polymer composition as defined in claim 4 wherein said polyphenylene ether and the high impact polystyrene resin each constitute from about 30 to 70 parts by weight per 100 parts of polymer components.
Claim 5
Dependent Claim
17 words
A stabilized polymer composition as defined in claim 5 wherein said polyphenylene ether component is a poly(2,6-dialkyl-1,4-phenylene)ether.
Claim 6
Dependent Claim
46 words
A stabilized polymer as defined in claim 6 where the alkanolamine is of the formula NR3 where each R is independently selected from the group of hydrogen and alkanol having from 1 to 4 carbon atoms provided that at least two of said Rs are alkanol.
Claim 7
Dependent Claim
25 words
A stabilized polymer composition as defined in claim 1 wherein said alkanolamine comprises from about 0.1 to 6.0 per cent by weight of the composition.
Claim 8
Dependent Claim
35 words
A stabilized polymer composition as defined in claim 1 wherein said stabilizer combination comprises said inorganic sulfide and said alkanolamine, each in an amount of from 0.1 to 6.0 percent by weight of the composition.
Claim 9
Dependent Claim
25 words
A stabilized polymer composition as defined in claim 9 which includes from about 0.05 percent to about 6 percent by weight of a metal oxide.
Claim 10
Dependent Claim
16 words
A stabilized polymer composition as defined in claim 10 wherein the metal oxide is zinc oxide.
Claim 11
Dependent Claim
36 words
A stabilized polymer composition as defined in claim 6 where the stabilizer combination comprises said organic phosphite and said alkanolamine, each in an amount of from 0.1 to 6.0 percent by weight of the total composition.
Claim 12
Dependent Claim
39 words
A stabilized polymer composition as defined in claim 6 wherein said stabilizer combination comprises the alkanolamine, the organic phosphite and the inorganic sulfide, each in an amount of from 0.1 to 2.0 percent by weight of the total composition.
Claim 13
Dependent Claim
25 words
A stabilized polymer composition as defined in claim 13 which includes from about 0.05 percent to about 6 percent by weight of a metal oxide.
Claim 14
Dependent Claim
16 words
A stabilized polymer composition as defined in claim 14 wherein the metal oxide is zinc oxide.
Claim 15
Dependent Claim
15 words
A stabilized polymer composition as defined in claim 6 wherein said alkanolamine is a trialkanolamine.
Claim 16
Dependent Claim
72 words
A stabilized polymer composition comprising from 30 to 70 parts by weight of a poly(2,6-dialkyl-1,4-phenylene) ether, from 30 to 70 parts by weight of a polystyrene resin and from 0.1 to 6.0 percent by weight of an alkanolamine in combination with a member selected from the group consisting of organic phosphites, inorganic sulfides and mixtures thereof each in an amount of from 0.1 to 6.0 percent by weight of the total composition.
Claim 17
Dependent Claim
26 words
A stabilized polymer composition as defined in claim 17 wherEin said polyphenylene ether is a poly(2,6-dimethyl-1,4-phenylene)ether and the polystyrene resin is a high impact strength polystyrene.
Claim 18
Dependent Claim
36 words
A stabilized polymer composition as defined in claim 18 wherein said stabilizer is a mixture of alkanolamine and an organic phosphite, each in an amount of from 0.1 to 6.0 percent by weight of the composition.
Claim 19
Dependent Claim
36 words
A stabilized polymer composition as defined in claim 18 wherein said stabilizer is a mixture of the alkanolamine and inorganic sulfide, each in an amount of from 0.1 to 6.0 percent by weight of the composition.
Claim 20
Dependent Claim
60 words
A stabilized polymer composition comprising approximately equal portions of a poly(2,6-dimethyl-1,4-phenylene) ether and high impact polystyrene resin and a stabilizer comprising a suflide selected from the group consisting of zinc sulfide and cadmium sulfide, a trialkanolamine of the formula NR3 wherein each R is independently alkanol having from 1 to 4 carbon atoms and an organic phosphite of the formula
Claim 21
Dependent Claim
21 words
A stabilized polymer as defined in claim 21 stabilized with a mixture of said cadmium or zinc sulfide, triethanolamine and tridecylphosphite.
Claim 22
Dependent Claim
11 words
A stabilized polymer composition comprising a polyphenylene ether of the formula:
Claim 23
Dependent Claim
21 words
A stabilized polymer composition as defined in claim 23 wherein said trialkanolamine is in combination with cadmium sulfide or zinc sulfide.
Claim 24
Dependent Claim
15 words
A stabilized polymer composition as defined in claim 24 which also includes said organic phosphite.
Claim 25
Dependent Claim
38 words
A stabilized polymer composition as defined in claim 23 wherein said trialkanolamine is in combination with said inorganic sulfide and said composition also includes from about 0.05 percent to about 6 percent by weight of a metal oxide.
Claim 26
Dependent Claim
19 words
A stabilized Polymer composition as defined in claim 26 wherein the metal oxide is titanium dioxide or zinc oxide.
Claim 27
Dependent Claim
30 words
A stabilized polymer composition as defined in claim 23 which also includes a polystyrene resin having at least 25% by weight polymer units derived from a monomer having the formula
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) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |