US5006403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wholly aromatic polyester fiber-reinforced poly(phenylene oxide) and process for preparing same
Assignee: University of Akron
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Filing: 1990-06-05
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Granted: 1991-04-09
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Expires: 2010-06-05
Abstract
Abstract Self-reinforced polymer composites of about 97.5-5% by weight of poly(phenylene oxide) and about 2.5-95% by weight of a melt processable wholly aromatic polyester which exhibt anisotropic properties in the melt phase. This wholly aromatic polyester is a liquid crystal polymer, or LCP. The wholly aromatic polyester is in the form of predominantly unidirectionally oriented continuous fibers primarily in the range of about 1 to 10 micrometers in diameter, distributed in a matrix of poly(phenylene oxide). The polymer composites of this invention have high tensile strength, high modulus, satisfactory elongation, good impact strength, and good high temperature properties.
Inventors
- 👤 Avraam Isayev
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:54
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/38; C09K19/3804; C09K19/3809; C08; C08L; C08L67/00; C08L71/00; Y; Y10; Y10S; Y10S264/00; Y10S264/26; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249924; Y10T428/24994; Y10T428/249942; Y10T428/249947; Y10T428/29; Y10T428/2913; Y10T428/31504; Y10T428/31786
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
73 words
A self-reinforced polymer composite comprising: (a) from about 97.5% to about 5% by weight, based on a total polymer weight, of thermoplastic poly(phenylene oxide), and (b) from about 2.5% to about 95% by weight, based on total polymer weight, of a melt processable wholly aromatic polyester; said polyester being essentially in the form of continuous, predominantly unidirectionally oriented fibers which are formed in situ in a matrix of said thermoplastic poly(phenylene oxide) polymer.
Claim 2
Dependent Claim
73 words
A self-reinforced polymer composite comprising: (a) from about 97.5% to about 5% by weight, based on a total polymer weight, of thermoplastic poly(phenylene oxide), and (b) from about 2.5% to about 95% by weight, based on total polymer weight, of a melt processable wholly aromatic polyester; said polyester being essentially in the form of continuous, predominantly unidirectionally oriented fibers which are formed in situ in a matrix of said thermoplastic poly(phenylene oxide) polymer.
Claim 3
Dependent Claim
39 words
A polymer composite according to claim 1 comprising from about 97.5% to about 90% by weight of said poly(phenylene oxide) and from about 2.5% to about 10% by weight of said wholly aromatic polyester, based on total polymer weight.
Claim 4
Dependent Claim
12 words
A molded composite article formed from the polymer composite of claim 1.
Claim 5
Dependent Claim
14 words
A fiber which has been melt spun from the polymer composite of claim 1.
Claim 6
Dependent Claim
12 words
A film or tape formed from the polymer composite of claim 1.
Claim 7
Dependent Claim
138 words
A process for preparing a self-reinforced polymer composite comprising (1) thermoplastic poly(phenylene oxide) and (2) a melt processable wholly aromatic polyester, which comprises mixing said poly(phenylene oxide) with from about 2.5% to about 95% by weight, based on total polymer weight, of said melt processable wholly aromatic polyester at a temperature at which both polymers are melt processable, and under mixing conditions effective to give, on cooling, a polymer composite in which the wholly aromatic polyester is present in the form of predominantly unidirectionally oriented fibers in a matrix of said thermoplastic poly(phenylene oxide) polymer, extruding the resulting blend in the melt phase, cooling the blend and recovering a self-reinforced polymer composite comprising said poly(phenylene oxide) and said wholly aromatic polyester being in the form of continuous predominantly unidirectionally oriented fibers in a matrix of said poly(phenylene oxide).
Claim 8
Dependent Claim
138 words
A process for preparing a self-reinforced polymer composite comprising (1) thermoplastic poly(phenylene oxide) and (2) a melt processable wholly aromatic polyester, which comprises mixing said poly(phenylene oxide) with from about 2.5% to about 95% by weight, based on total polymer weight, of said melt processable wholly aromatic polyester at a temperature at which both polymers are melt processable, and under mixing conditions effective to give, on cooling, a polymer composite in which the wholly aromatic polyester is present in the form of predominantly unidirectionally oriented fibers in a matrix of said thermoplastic poly(phenylene oxide) polymer, extruding the resulting blend in the melt phase, cooling the blend and recovering a self-reinforced polymer composite comprising said poly(phenylene oxide) and said wholly aromatic polyester being in the form of continuous predominantly unidirectionally oriented fibers in a matrix of said poly(phenylene oxide).
Claim 9
Dependent Claim
18 words
A process according to claim 6 in which said wholly aromatic polyester is anisotropic in the melt phase.
Claim 10
Dependent Claim
28 words
A process according to claim 6 in which the mixing temperature of said poly(phenylene oxide) and said wholly aromatic polyester is from about 280° to about 350° C.
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) | 1994-04-08 | 1994-10-08 | 1995-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-04-08 | 1998-10-08 | 1999-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-04-08 | 2002-10-08 | 2003-04-09 | $7700.00 | Window Closed / Lapsed |