Patent US4473682A successfully refreshed from Google Patents.
US4473682A
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US
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Melt processable polyester capable of forming an anisotropic melt comprising a relatively low concentration of 6-oxy-2-naphthoyl moiety, 4-oxybenzoyl moiety, 4,4'-dioxybiphenyl moiety, and terephthaloyl moiety
Assignee: Celanese Corp
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Filing: 1983-04-18
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Granted: 1984-09-25
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Expires: 2003-04-18
Abstract
Abstract The novel polyester of the present invention is capable of forming an anisotropic melt phase and may be prepared on a relatively economical basis. Such polyester includes a relatively low concentration of 6-oxy-2-naphthoyl moiety in combination with a more substantial concentration of 4-oxybenzoyl moiety. Other key moieties present are 4,4'-dioxybiphenyl moiety and terephthaloyl moiety. The polyester has been found to be capable of undergoing melt extrusion at a sufficiently low temperature to form quality high performance fibers, films, and three-dimensional shaped articles. Such product surprisingly has been found to be capable of exhibiting unusually high modulus characteristics in combination with other desirable properties.
Inventors
- 👤 Gordon W. Calundann
- 👤 Larry F. Charbonneau
- 👤 Brian C. Benicewicz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:07
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/60; C08G63/605
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
129 words
A melt processable polyester capable of forming an anisotropic melt phase at a temperature below approximately 400° C. consisting essentially of the recurring moieties I, II, III, and IV wherein: ##STR9## where aromatic rings of moieties III and IV optionally may include substitution of at least some of the hydrogen atoms present upon an aromatic ring selected from the group consisting of an alkyl group of 1 to 4 carbon atoms, an alkoxy group of 1 to 4 carbon atoms, halogen, phenyl, and mixtures of the foregoing, and wherein said polyester comprises approximately 3 to 10 mole percent of moiety I, approximately 20 to 70 mole percent of moiety II, approximately 7.5 to 38.5 mole percent of moiety III, and approximately 7.5 to 38.5 mole percent of moiety IV.
Claim 2
Dependent Claim
129 words
A melt processable polyester capable of forming an anisotropic melt phase at a temperature below approximately 400° C. consisting essentially of the recurring moieties I, II, III, and IV wherein: ##STR9## where aromatic rings of moieties III and IV optionally may include substitution of at least some of the hydrogen atoms present upon an aromatic ring selected from the group consisting of an alkyl group of 1 to 4 carbon atoms, an alkoxy group of 1 to 4 carbon atoms, halogen, phenyl, and mixtures of the foregoing, and wherein said polyester comprises approximately 3 to 10 mole percent of moiety I, approximately 20 to 70 mole percent of moiety II, approximately 7.5 to 38.5 mole percent of moiety III, and approximately 7.5 to 38.5 mole percent of moiety IV.
Claim 3
Dependent Claim
24 words
A melt processable polyester according to claim 1 which is capable of forming an anisotropic melt phase at a temperature below approximately 370° C.
Claim 4
Dependent Claim
27 words
A melt processable polyester according to claim 1 which is capable of undergoing melt processing at a temperature in the range of approximately 320° to 390° C.
Claim 5
Dependent Claim
32 words
A melt processable polyester according to claim 1 which exhibits an inherent viscosity of at least 0.6 when dissolved in a concentration of 0.1 percent by weight in pentafluorophenol at 60° C.
Claim 6
Dependent Claim
32 words
A melt processable polyester according to claim 1 which exhibits an inherent viscosity of at least 1.0 when dissolved in a concentration of 0.1 percent by weight in pentafluorophenol at 60° C.
Claim 7
Dependent Claim
36 words
A melt processable polyester according to claim 1 which exhibits an inherent viscosity in the range of approximately 6 to 9 when dissolved in a concentration of 0.1 percent by weight in pentafluorophenol at 60° C.
Claim 8
Dependent Claim
34 words
A melt processable polyester according to claim 1 which exhibits a melt viscosity in the range of approximately 800 to 1500 poise at 370° C. and a shear rate of 10 sec. -1 .
Claim 9
Dependent Claim
25 words
A melt processable polyester according to claim 1 wherein the aromatic rings of moieties I, II, III, and IV are substantially free of ring substitution.
Claim 10
Dependent Claim
13 words
A fiber which has been melt spun from the polyester of claim 1.
Claim 11
Dependent Claim
13 words
A film which has been melt extruded from the polyester of claim 1.
Claim 12
Dependent Claim
11 words
A molded article comprising the melt processable polyester of claim 1.
Claim 13
Dependent Claim
27 words
A molding compound comprising the melt processable polyester of claim 1 which incorporates approximately 1 to 60 percent by weight of a solid filler and/or reinforcing agent.
Claim 14
Dependent Claim
129 words
A melt processable polyester capable of forming an anisotropic melt phase at a temperature below approximately 400° C. consisting essentially of the recurring moieties I, II, III, and IV wherein: ##STR10## where aromatic rings of moieties III and IV optionally may include substitution of at least some of the hydrogen atoms present upon an aromatic ring selected from the group consisting of an alkyl group of 1 to 4 carbon atoms, an alkoxy group of 1 to 4 carbon atoms, halogen, phenyl, and mixtures of the foregoing, and wherein said polyester comprises approximately 5 to 10 mole percent of moiety I, approximately 50 to 65 mole percent of moiety II, approximately 12.5 to 22.5 mole percent of moiety III, and approximately 12.5 to 22.5 mole percent of moiety IV.
Claim 15
Dependent Claim
129 words
A melt processable polyester capable of forming an anisotropic melt phase at a temperature below approximately 400° C. consisting essentially of the recurring moieties I, II, III, and IV wherein: ##STR10## where aromatic rings of moieties III and IV optionally may include substitution of at least some of the hydrogen atoms present upon an aromatic ring selected from the group consisting of an alkyl group of 1 to 4 carbon atoms, an alkoxy group of 1 to 4 carbon atoms, halogen, phenyl, and mixtures of the foregoing, and wherein said polyester comprises approximately 5 to 10 mole percent of moiety I, approximately 50 to 65 mole percent of moiety II, approximately 12.5 to 22.5 mole percent of moiety III, and approximately 12.5 to 22.5 mole percent of moiety IV.
Claim 16
Dependent Claim
24 words
A melt processable polyester according to claim 13 which is capable of forming an anisotropic melt phase at a temperature below approximately 370° C.
Claim 17
Dependent Claim
27 words
A melt processable polyester according to claim 13 which is capable of undergoing melt processing at a temperature in the range of approximately 320° to 390° C.
Claim 18
Dependent Claim
32 words
A melt processable polyester according to claim 13 which exhibits an inherent viscosity of at least 0.6 when dissolved in a concentration of 0.1 percent by weight in pentafluorophenol at 60° C.
Claim 19
Dependent Claim
32 words
A melt processable polyester according to claim 13 which exhibits an inherent viscosity of at least 1.0 when dissolved in a concentration of 0.1 percent by weight in pentafluorophenol at 60° C.
Claim 20
Dependent Claim
36 words
A melt processable polyester according to claim 13 which exhibits an inherent viscosity in the range of approximately 6 to 9 when dissolved in a concentration of 0.1 percent by weight in pentafluorophenol at 60° C.
Claim 21
Dependent Claim
34 words
A melt processable polyester according to claim 13 which exhibits a melt viscosity in the range of approximately 800 to 1500 poise at 370° C. and a shear rate of 10 sec. -1 .
Claim 22
Dependent Claim
25 words
A melt processable polyester according to claim 13 wherein the aromatic rings of moieites I, II, III, and IV are substantially free of ring substitution.
Claim 23
Dependent Claim
13 words
A fiber which has been melt spun from the polyester of claim 13.
Claim 24
Dependent Claim
13 words
A film which has been melt extruded from the polyester of claim 13.
Claim 25
Dependent Claim
11 words
A molded article comprising the melt processable polyester of claim 13.
Claim 26
Dependent Claim
27 words
A molding compound comprising the melt processable polyester of claim 13 which incorporates approximately 1 to 60 percent by weight of a solid filler and/or reinforcing agent.
References Cited (Backward Citations)
US4184996A
Cited
US4219461A
Cited
US4256624A
Cited
US4299756A
Cited
US4337190A
Cited
US4318842A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-09-25 | 1988-03-26 | 1988-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-25 | 1992-03-26 | 1992-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-25 | 1996-03-26 | 1996-09-25 | $7700.00 | Window Closed / Lapsed |