Patent US4337190A successfully refreshed from Google Patents.
US4337190A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester of 6-hydroxy-2-naphthoic acid and meta-hydroxy benzoic acid capable of readily undergoing melt processing
Assignee: Celanese Corp
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Filing: 1980-07-15
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Granted: 1982-06-29
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Expires: 2000-07-15
Abstract
Abstract A novel polyester is provided which has been found to exhibit an optically anisotropic melt phase at a temperature which enables it readily to undergo melt processing to form quality molded articles, etc. The polyester of the present invention is formed primarily of recurring 6-oxy-2-naphthoyl and m-oxybenzoyl moieties in the proportions indicated. The hydrogen atoms present upon the aromatic rings of these moieties optionally may be at least partially substituted (as described). Also, minor amounts of other ester-forming moieties may be included in the polyester so long as the optically anisotropic character in the melt and ease of melt processability are retained. In a preferred embodiment the wholly aromatic polyester is capable of undergoing melt processing at a temperature below approximately 370° C., and in a particularly preferred embodiment at a temperature of approximately 280° to 320° C.
Inventors
- 👤 Gordon W. Calundann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:47
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/06; C08G63/065
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
111 words
A melt processable wholly aromatic polyester capable of forming an optically anisotropic melt phase at a temperature below approximately 400° C. consisting essentially of the recurring moieties I and II which may include substitution of at least some of the hydrogen atoms present upon an aromatic ring wherein: ##STR7## with said optional substitution if present being selected from the group consisting of an alkyl group of 1 to 4 carbon atoms, an alkoxy group of 1 to 4 carbon atoms, phenyl, halogen, and mixtures of the foregoing, and wherein said polyester comprises approximately 10 to 90 mole percent of moiety I, and approximately 10 to 90 mole percent of moiety II.
Claim 2
Dependent Claim
111 words
A melt processable wholly aromatic polyester capable of forming an optically anisotropic melt phase at a temperature below approximately 400° C. consisting essentially of the recurring moieties I and II which may include substitution of at least some of the hydrogen atoms present upon an aromatic ring wherein: ##STR7## with said optional substitution if present being selected from the group consisting of an alkyl group of 1 to 4 carbon atoms, an alkoxy group of 1 to 4 carbon atoms, phenyl, halogen, and mixtures of the foregoing, and wherein said polyester comprises approximately 10 to 90 mole percent of moiety I, and approximately 10 to 90 mole percent of moiety II.
Claim 3
Dependent Claim
27 words
A melt processable wholly aromatic polyester according to claim 1 which is capable of forming an optically anisotropic melt phase at a temperature below approximately 350° C.
Claim 4
Dependent Claim
27 words
A melt processable wholly aromatic polyester according to claim 1 which is capable of forming an optically anisotropic melt phase at a temperature below approximately 320° C.
Claim 5
Dependent Claim
29 words
A melt processable wholly aromatic polyester according to claim 1 which is capable of undergoing melt processing at a temperature in the range of approximately 280° to 320° C.
Claim 6
Dependent Claim
33 words
A melt processable wholly aromatic polyester according to claim 1 which consists essentially of approximately 50 to 80 mole percent of moiety I and approximately 20 to 50 mole percent of moiety II.
Claim 7
Dependent Claim
33 words
A melt processable wholly aromatic polyester according to claim 1 which consists essentially of approximately 60 to 70 mole percent of moiety I and approximately 30 to 40 mole percent of moiety II.
Claim 8
Dependent Claim
21 words
A melt processable wholly aromatic polyester according to claim 1 wherein recurring moieties I and II are the sole moieties present.
Claim 9
Dependent Claim
21 words
A melt processable wholly aromatic polyester according to claim 1 wherein recurring moieties I and II are free of ring substitution.
Claim 10
Dependent Claim
34 words
A melt processable wholly aromatic polyester according to claim 1 which exhibits an inherent viscosity of at least 1.5 when dissolved in a concentration of 0.1 percent by weight in pentafluorophenol at 60° C.
Claim 11
Dependent Claim
34 words
A melt processable wholly aromatic polyester according to claim 1 which exhibits an inherent viscosity of 1.5 to 10 when dissolved in a concentration of 0.1 percent by weight in pentafluorophenol at 60° C.
Claim 12
Dependent Claim
13 words
A molded article comprising the melt processable wholly aromatic polyester of claim 1.
Claim 13
Dependent Claim
29 words
A molding compound comprising the melt processable wholly aromatic 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
15 words
A fiber which has been melt spun from the wholly aromatic polyester of claim 1.
Claim 15
Dependent Claim
15 words
A film which has been melt extruded from the wholly aromatic polyester of claim 1.
Claim 16
Dependent Claim
111 words
A melt processable wholly aromatic polyester capable of forming an optically anisotropic melt phase at a temperature below approximately 370° C. consisting essentially of the recurring moieties I and II which may include substitution of at least some of the hydrogen atoms present upon an aromatic ring wherein: ##STR8## with said optional substitution if present being selected from the group consisting of an alkyl group of 1 to 4 carbon atoms, an alkoxy group of 1 to 4 carbon atoms, phenyl, halogen, and mixtures of the foregoing, and wherein said polyester comprises approximately 50 to 80 mole percent of moiety I, and approximately 20 to 50 mole percent of moiety II.
Claim 17
Dependent Claim
111 words
A melt processable wholly aromatic polyester capable of forming an optically anisotropic melt phase at a temperature below approximately 370° C. consisting essentially of the recurring moieties I and II which may include substitution of at least some of the hydrogen atoms present upon an aromatic ring wherein: ##STR8## with said optional substitution if present being selected from the group consisting of an alkyl group of 1 to 4 carbon atoms, an alkoxy group of 1 to 4 carbon atoms, phenyl, halogen, and mixtures of the foregoing, and wherein said polyester comprises approximately 50 to 80 mole percent of moiety I, and approximately 20 to 50 mole percent of moiety II.
Claim 18
Dependent Claim
27 words
A melt processable wholly aromatic polyester according to claim 15 which is capable of forming an optically anisotropic melt phase at a temperature below approximately 350° C.
Claim 19
Dependent Claim
29 words
A melt processable wholly aromatic polyester according to claim 15 which is capable of undergoing melt processing at a temperature in the range of approximately 280° to 320° C.
Claim 20
Dependent Claim
33 words
A melt processable wholly aromatic polyester according to claim 15 which consists essentially of approximately 60 to 70 mole percent of moiety I and approximately 30 to 40 mole percent of moiety II.
Claim 21
Dependent Claim
21 words
A melt processable wholly aromatic polyester according to claim 15 wherein recurring moieties I and II are the sole moieties present.
Claim 22
Dependent Claim
21 words
A melt processable wholly aromatic polyester according to claim 15 wherein recurring moieties I and II are free of ring substitution.
Claim 23
Dependent Claim
34 words
A melt processable wholly aromatic polyester according to claim 15 which exhibits an inherent viscosity of at least 1.5 when dissolved in a concentration of 0.1 percent by weight in pentafluorophenol at 60° C.
Claim 24
Dependent Claim
35 words
A melt processable wholly aromatic polyester according to claim 15 which exhibits an inherent viscosity of approximately 1.5 to 10 when dissolved in a concentration of 0.1 percent by weight in pentafluorophenol at 60° C.
Claim 25
Dependent Claim
13 words
A molded article comprising the melt processable wholly aromatic polyester of claim 15.
Claim 26
Dependent Claim
29 words
A molding compound comprising the melt processable wholly aromatic polyester of claim 15 which incorporates approximately 1 to 60 percent by weight of a solid filler and/or reinforcing agent.
Claim 27
Dependent Claim
15 words
A fiber which has been melt spun from the wholly aromatic polyester of claim 15.
Claim 28
Dependent Claim
15 words
A film which has been melt extruded from the wholly aromatic polyester of claim 15.
Claim 29
Dependent Claim
61 words
A melt processable wholly aromatic polyester capable of forming an optically anisotropic melt phase at a temperature below approximately 350° C. consisting of the recurring moieties I and II which are free of ring substitution wherein: ##STR9## and wherein said polyester comprises approximately 60 to 70 mole percent of moiety I, and approximately 30 to 40 mole percent of moiety II.
Claim 30
Dependent Claim
61 words
A melt processable wholly aromatic polyester capable of forming an optically anisotropic melt phase at a temperature below approximately 350° C. consisting of the recurring moieties I and II which are free of ring substitution wherein: ##STR9## and wherein said polyester comprises approximately 60 to 70 mole percent of moiety I, and approximately 30 to 40 mole percent of moiety II.
Claim 31
Dependent Claim
27 words
A melt processable wholly aromatic polyester according to claim 27 which is capable of forming an optically anisotropic melt phase at a temperature below approximately 320° C.
Claim 32
Dependent Claim
28 words
A melt processable wholly aromatic polyester according to claim 27 which consists of approximately 60 mole percent of moiety I and approximately 40 mole percent of moiety II.
Claim 33
Dependent Claim
34 words
A melt processable wholly aromatic polyester according to claim 27 which exhibits an inherent viscosity of at least 1.5 when dissolved in a concentration of 0.1 percent by weight in pentafluorophenol at 60° C.
Claim 34
Dependent Claim
35 words
A melt processable wholly aromatic polyester according to claim 27 which exhibits an inherent viscosity of approximately 1.5 to 10 when dissolved in a concentration of 0.1 percent by weight in pentafluorophenol at 60° C.
Claim 35
Dependent Claim
13 words
A molded article comprising the melt processable wholly aromatic polyester of claim 27.
Claim 36
Dependent Claim
29 words
A molding compound comprising the melt processable wholly aromatic polyester of claim 27 which incorporates approximately 1 to 60 percent by weight of a solid filler and/or reinforcing agent.
Claim 37
Dependent Claim
15 words
A fiber which has been melt spun from the wholly aromatic polyester of claim 27.
Claim 38
Dependent Claim
15 words
A film which has been melt extruded from the wholly aromatic polyester of claim 27.
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) | 1985-06-28 | 1985-12-28 | 1986-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-28 | 1989-12-28 | 1990-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-28 | 1993-12-28 | 1994-06-29 | $7700.00 | Window Closed / Lapsed |