US4418029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized polyphenylene sulfide fiber
Assignee: Phillips Petroleum Co
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Filing: 1982-05-11
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Granted: 1983-11-29
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Expires: 2002-05-11
Abstract
Abstract The heat stability of arylene sulfide resins, such as poly(p-phenylene sulfide) resin, is improved by the addition of cure retarders comprising Group IIA or Group IIB metal salts of fatty acids. The resin compositions of the invention are particularly applicable for reducing gel formation during melt extrusion.
Inventors
- 👤 Jerry O. Reed
- 👤 Ronald D. Mathis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:55
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/58; D01F6/76; D01F6/765; C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/098; D01F1/00; D01F1/02; D01F1/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
101 words
In a process for melt extruding fiber grade poly(arylene sulfide) resin having a melt flow of about 50 to about 400 into a fiber, the improvement for reducing gel formation during melt extrusion of said resin into a fiber which comprises incorporating into siad resin an effective heat and melt flow stabilizing amount of at least one Group IIA or Group IIB metal salt of a fatty acid which amount is sufficient to retard curing and cross-linking or substantial alteration of physical properties during heating of said resin during melt extrusion and thereby minimizing plugging of filters and spinnerets with gel.
Claim 2
Dependent Claim
101 words
In a process for melt extruding fiber grade poly(arylene sulfide) resin having a melt flow of about 50 to about 400 into a fiber, the improvement for reducing gel formation during melt extrusion of said resin into a fiber which comprises incorporating into siad resin an effective heat and melt flow stabilizing amount of at least one Group IIA or Group IIB metal salt of a fatty acid which amount is sufficient to retard curing and cross-linking or substantial alteration of physical properties during heating of said resin during melt extrusion and thereby minimizing plugging of filters and spinnerets with gel.
Claim 3
Dependent Claim
14 words
A process according to claim 1 wherein said resin is a poly(p-phenyl sulfide) resin.
Claim 4
Dependent Claim
30 words
A process according to claim 1 wherein the amount of stabilizer added ranges from about 0.5 to about 2 weight percent based on the weight of the arylene sulfide polymer.
Claim 5
Dependent Claim
25 words
A process according to claim 1 wherein said resin is a poly(p-phenylene sulfide) resin and said stabilizer is calcium stearate, magnesium stearate or zinc stearate.
Claim 6
Dependent Claim
29 words
A process according to claim 4 wherein the amount of stabilizer present ranges from about 0.1 to about 5 weight percent based on the weight of poly(arylene sulfide) resin.
Claim 7
Dependent Claim
10 words
A fiber formed according to the process of claim 1.
References Cited (Backward Citations)
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US3519598A
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US3349047A
Cited
US3725362A
Cited
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Cited
US4247598A
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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) | 1986-11-28 | 1987-05-30 | 1987-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-28 | 1991-05-30 | 1991-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-28 | 1995-05-30 | 1995-11-29 | $7700.00 | Window Closed / Lapsed |