US5006402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wholly aromatic polyester fiber-reinforced high performance thermoplastic and process for preparing same
Assignee: AKRON AN OHIO STATE UNIVERSITY, University of
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Filing: 1989-04-28
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Granted: 1991-04-09
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Expires: 2009-04-28
Abstract
Abstract Self-reinforced polymer composities of 60-5 percent by weight of an at least partially crystalline high performance thermoplastic polymer and 40-95 percent by weight of a melt processable wholly aromatic polyester which exhibit anisotropic properties in the melt phase. This wholly aromatic polyester is a liquid crystal polymer, or LCP. The high performance themoplastic polymer has a melting point of at least 200°. Polyether etherketone is a preferred at least partially crystalline polymer. 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 polyether etherketone. The polymer composites of this invnetion 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
2026-11-05 12:35
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; Y10T428/31797
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
94 words
A self-reinforced polymer composite comprising: (a) from about 60 to about 5 percent by weight, based on a total polymer weight, of an at least partially crystalline high performance thermoplastic polymer, and (b) from about 40 to about 95 percent by weight, based on total polymer weight, of a melt processable wholly aromatic polyester; said high performance thermoplastic polymer having a melting point of at least about 200° C.; said polyester being essentially in the form of continuous, predominantly unidirectionally oriented fibers which are formed in situ in a matrix of said thermoplastic polymer.
Claim 2
Dependent Claim
94 words
A self-reinforced polymer composite comprising: (a) from about 60 to about 5 percent by weight, based on a total polymer weight, of an at least partially crystalline high performance thermoplastic polymer, and (b) from about 40 to about 95 percent by weight, based on total polymer weight, of a melt processable wholly aromatic polyester; said high performance thermoplastic polymer having a melting point of at least about 200° C.; said polyester being essentially in the form of continuous, predominantly unidirectionally oriented fibers which are formed in situ in a matrix of said thermoplastic polymer.
Claim 3
Dependent Claim
15 words
A polymer composite according to claim 1 in which said thermoplastic polymer is polyether etherketone.
Claim 4
Dependent Claim
41 words
A polymer composite according to claim 1 comprising from about 50 to about 5 percent by weight of said thermoplastic and from about 50 to about 95 percent by weight of said wholly aromatic polyester is anisotropic in the melt phase.
Claim 5
Dependent Claim
40 words
A polymer composite according to claim 1 comprising from about 50 to about 5 percent by weight of said thermoplastic and from about 50 to about 95 percent by weight of said wholly aromatic polyester, based on total polymer weight.
Claim 6
Dependent Claim
12 words
A molded composite article formed from the polymer composite of claim 1,
Claim 7
Dependent Claim
14 words
A fiber which has been melt spun from the polymer composite of claim 1,
Claim 8
Dependent Claim
16 words
A film or tape which has been melt extruded from the polymer composite of claim 1.
Claim 9
Dependent Claim
159 words
A process for preparing a self-reinforced polymer composite comprising (1) an at least partially crystalline high performance thermoplastic polymer having a melting point of at least about 200° C., and (2) a melt processable wholly aromatic polyester, which comprises mixing said high performance thermoplastic polymer with from about 50 to about 95 percent 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 polymer, extruding the resulting blend in the melt phase, cooling the blend and recovering a self-reinforced polymer composite comprising said thermoplastic polymer and said wholly aromatic polyester, said wholly aromatic polyester being in the form of continuous predominantly unidirectionally oriented fibers in a matrix of said thermoplastic polymer.
Claim 10
Dependent Claim
159 words
A process for preparing a self-reinforced polymer composite comprising (1) an at least partially crystalline high performance thermoplastic polymer having a melting point of at least about 200° C., and (2) a melt processable wholly aromatic polyester, which comprises mixing said high performance thermoplastic polymer with from about 50 to about 95 percent 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 polymer, extruding the resulting blend in the melt phase, cooling the blend and recovering a self-reinforced polymer composite comprising said thermoplastic polymer and said wholly aromatic polyester, said wholly aromatic polyester being in the form of continuous predominantly unidirectionally oriented fibers in a matrix of said thermoplastic polymer.
Claim 11
Dependent Claim
14 words
A process according to claim 8 in which said thermoplastic polymer is polyether etherketone.
Claim 12
Dependent Claim
18 words
A process according to claim 8 in which said wholly aromatic polyester is anisotropic in the melt phase.
Claim 13
Dependent Claim
28 words
A process according to claim 8 in which the mixing temperature of said thermoplastic polymer and said wholly aromatic polyester is from about 300° to about 400° C.
Claim 14
Dependent Claim
46 words
A process according to claim 8 in which particles of said thermoplastic polymer and said wholly aromatic polyester are mixed under conditions forming a physical mixture of said particles and then dried prior to said mixing at a temperature at which both polymers are melt processable.
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 |