US5149749A
Expired / Lapsed
US
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Poly(phenylene sulfide) composition and articles having improved thermal stability at high temperatures
Assignee: Phillips Petroleum Co
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Filing: 1990-05-31
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Granted: 1992-09-22
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Expires: 2010-05-31
Abstract
Abstract A polymer composition having improved thermal stability at high temperatures. The composition comprises a poly(phenylene sulfide) base resin and a thermal stabilizer selected from the group consisting of polyethersulfone and polyamide-imide, the thermal stabilizer being present in the composition in an amount sufficient to improve the thermal stability of the composition at a temperature of at least 150° C. A method of improving the thermal stability of a poly(phenylene sulfide) resin and articles produced therefrom at high temperatures and an article having improved thermal stability at high temperatures are also provided.
Inventors
- 👤 Jennings P. Blackwell, deceased
- 👤 Bruce L. Ramsey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:11
CPC Classifications
C; C08; C08L; C08L81/00; C08L81/02; C08L79/00; C08L79/04; C08L79/08; C08L81/06
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
133 words
A polymer composition for forming films and fibers having improved thermal stability at high temperatures, said composition consisting essentially of: a poly(phenylene sulfide) base resin having at least about 90% by weight of poly(p-phenylene sulfide) repeat units and a melt flow in the range of from about 10 to about 300 g/10 minutes as determined by ASTM D-1238, Procedure B-Automatically Time Flow Rate Measurement, Condition 315/5.0, with a 5 minute preheat; and a thermal stabilizer selected from the group consisting of polyethersulfone and polyamide-imide for increasing the thermal stability of the films and fibers at a temperature of at least 150° C. without deteriorating the strength thereof, said thermal stabilizer being present in the composition in an amount in the range of from about 0.5% to about 5% by weight of the composition.
Claim 2
Dependent Claim
133 words
A polymer composition for forming films and fibers having improved thermal stability at high temperatures, said composition consisting essentially of: a poly(phenylene sulfide) base resin having at least about 90% by weight of poly(p-phenylene sulfide) repeat units and a melt flow in the range of from about 10 to about 300 g/10 minutes as determined by ASTM D-1238, Procedure B-Automatically Time Flow Rate Measurement, Condition 315/5.0, with a 5 minute preheat; and a thermal stabilizer selected from the group consisting of polyethersulfone and polyamide-imide for increasing the thermal stability of the films and fibers at a temperature of at least 150° C. without deteriorating the strength thereof, said thermal stabilizer being present in the composition in an amount in the range of from about 0.5% to about 5% by weight of the composition.
Claim 3
Dependent Claim
54 words
The composition of claim 1 wherein said poly(phenylene sulfide) base resin has no substantial amount of high temperature air curing and a melt flow in the range of from about 20 to about 200 g/10 minutes as determined by ASTM D-1238, Procedure B-Automatically Time Flow Rate Measurement, Condition 315/5.0, with a 5 minute preheat.
Claim 4
Dependent Claim
25 words
The composition of claim 1 wherein said thermal stabilizer is present in said composition in an amount of about 1.0% by weight of said composition.
Claim 5
Dependent Claim
11 words
The composition of claim 1 wherein said thermal stabilizer is polyethersulfone.
Claim 6
Dependent Claim
11 words
The composition of claim 1 wherein said thermal stabilizer is polyamide-imide.
Claim 7
Dependent Claim
10 words
A film formed of the composition defined in claim 1.
Claim 8
Dependent Claim
10 words
A fiber formed of the composition defined in claim 1.
Claim 9
Independent Claim
97 words
A method of improving the thermal stability of films and fibers produced from a poly(phenylene sulfide) resin having at least about 90% by weight of poly(p-phenylene sulfide) repeat units at high temperatures comprising: admixing with said resin in the range of from about 0.5% to about 5% by weight, based on the total weight of the mixture, of a thermal stabilizer for increasing the thermal stability of the films and fibers at a temperature of at least 150° C. without deteriorating the strength thereof, said thermal stabilizer being selected from the group consisting of polyethersulfone and polyamide-imide.
Claim 10
Independent Claim
97 words
A method of improving the thermal stability of films and fibers produced from a poly(phenylene sulfide) resin having at least about 90% by weight of poly(p-phenylene sulfide) repeat units at high temperatures comprising: admixing with said resin in the range of from about 0.5% to about 5% by weight, based on the total weight of the mixture, of a thermal stabilizer for increasing the thermal stability of the films and fibers at a temperature of at least 150° C. without deteriorating the strength thereof, said thermal stabilizer being selected from the group consisting of polyethersulfone and polyamide-imide.
Claim 11
Dependent Claim
54 words
The method of claim 8 wherein said poly(phenylene sulfide) base resin has no substantial amount of high temperature air curing and a melt flow in the range of from about 20 to about 200 g/10 minutes as determined by ASTM D-1238, Procedure B-Automatically Time Flow Rate Measurement, Condition 315/5.0, with a 5 minute preheat.
Claim 12
Dependent Claim
37 words
The method of claim 8 wherein said thermal stabilizer is admixed with said resin in an amount such that it is present in the resulting mixture in a concentration of about 1.0% by weight of the mixture.
Claim 13
Dependent Claim
11 words
The method of claim 8 wherein said thermal stabilizer is polyethersulfone.
Claim 14
Dependent Claim
11 words
The method of claim 8 wherein said thermal stabilizer is polyamide-imide.
Claim 15
Dependent Claim
11 words
A film formed in accordance with the method of claim 8.
Claim 16
Dependent Claim
11 words
A fiber formed in accordance with the method of claim 8.
Claim 17
Dependent Claim
124 words
A film having improved thermal stability at high temperatures, said film being formed of a polymer composition consisting essentially of: a poly(phenylene sulfide) base resin having at least about 90% by weight of poly(p-phenylene sulfide) repeat units and a melt flow in the range of from about 10 to about 300 g/10 minutes as determined by ASTM D-1238, Procedure B-Automatically Time Flow Rate Measurement, Condition 315/5.0, with a 5 minute preheat; and a thermal stabilizer selected from the group consisting of polyethersulfone and polyamide-imide for increasing the thermal stability of the film at a temperature of at least 180° C. without deteriorating the strength thereof, said thermal stabilizer being present in the composition in an amount of about 1.0% by weight of the composition.
Claim 18
Dependent Claim
124 words
A film having improved thermal stability at high temperatures, said film being formed of a polymer composition consisting essentially of: a poly(phenylene sulfide) base resin having at least about 90% by weight of poly(p-phenylene sulfide) repeat units and a melt flow in the range of from about 10 to about 300 g/10 minutes as determined by ASTM D-1238, Procedure B-Automatically Time Flow Rate Measurement, Condition 315/5.0, with a 5 minute preheat; and a thermal stabilizer selected from the group consisting of polyethersulfone and polyamide-imide for increasing the thermal stability of the film at a temperature of at least 180° C. without deteriorating the strength thereof, said thermal stabilizer being present in the composition in an amount of about 1.0% by weight of the composition.
Claim 19
Dependent Claim
58 words
The film of claim 15 wherein said poly(phenylene sulfide) base resin of said polymer composition has no substantial amount of high temperature air curing and a melt flow in the range of from about 20 to about 200 g/10 minutes as determined by ASTM D-1238, Procedure B-Automatically Time Flow Rate Measurement, Condition 315/5.0, with a 5 minute preheat.
Claim 20
Dependent Claim
15 words
The film of claim 15 wherein said thermal stabilizer of said polymer composition is polyethersulfone.
Claim 21
Dependent Claim
16 words
The film of claim 15 wherein said thermal stabilizer of said polymer composition is is polyamide-imide.
Claim 22
Dependent Claim
124 words
A fiber having improved thermal stability at high temperatures, said fiber being formed of a polymer composition consisting essentially of: a poly(phenylene sulfide) base resin having at least about 90% by weight of poly(p-phenylene sulfide) repeat units and a melt flow in the range of from about 10 to about 300 g/10 minutes as determined by ASTM D-1238, Procedure B-Automatically Time Flow Rate Measurement, Condition 315/5.0, with a 5 minute preheat; and a thermal stabilizer selected from the group consisting of polyethersulfone and polyamide-imide for increasing the thermal stability of the fiber at a temperature of at least 180° C. without deteriorating the strength thereof, said thermal stabilizer being present in the composition in an amount of about 1.0% by weight of the composition.
Claim 23
Dependent Claim
124 words
A fiber having improved thermal stability at high temperatures, said fiber being formed of a polymer composition consisting essentially of: a poly(phenylene sulfide) base resin having at least about 90% by weight of poly(p-phenylene sulfide) repeat units and a melt flow in the range of from about 10 to about 300 g/10 minutes as determined by ASTM D-1238, Procedure B-Automatically Time Flow Rate Measurement, Condition 315/5.0, with a 5 minute preheat; and a thermal stabilizer selected from the group consisting of polyethersulfone and polyamide-imide for increasing the thermal stability of the fiber at a temperature of at least 180° C. without deteriorating the strength thereof, said thermal stabilizer being present in the composition in an amount of about 1.0% by weight of the composition.
Claim 24
Dependent Claim
58 words
The fiber of claim 19 wherein said poly(phenylene sulfide) base resin of said polymer composition has no substantial amount of high temperature air curing and a melt flow in the range of from about 20 to about 200 g/10 minutes as determined by ASTM D-1238, Procedure B-Automatically Time Flow Rate Measurement, Condition 315/5.0, with a 5 minute preheat.
Claim 25
Dependent Claim
15 words
The fiber of claim 19 wherein said thermal stabilizer of said polymer composition is polyethersulfone.
Claim 26
Dependent Claim
15 words
The fiber of claim 19 wherein said thermal stabilizer of said polymer composition is polyamide-imide.
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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) | 1995-09-22 | 1996-03-23 | 1996-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-22 | 2000-03-23 | 2000-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-22 | 2004-03-23 | 2004-09-22 | $7700.00 | Window Closed / Lapsed |