US4224433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermotropic polyesters of 2,6-dihydroxyanthraquinone
Assignee: Celanese Corp
•
Filing: 1979-03-16
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Granted: 1980-09-23
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Expires: 1999-03-16
Abstract
Abstract A thermotropic wholly aromatic polyester is provided which is capable of forming an anisotropic melt phase. This novel polyester displays surprising tractability and may be used as a molding resin or may be melt spun into fibers. The aromatic polyester of the present invention consists essentially of the recurring units (a) 2,6-dioxyanthraquinone moiety, (b) 4-oxybenzoyl moiety, and (c) aromatic diacid moiety. The resulting polyester exhibits a melting point below approximately 375° C., and preferably below approximately 350° C. Fibers which are melt spun from the polyester exhibit unexpectedly good thermal stability. The desirable tractability properties of the polyester are attributed to its anisotropic melt phase, which is due to the inclusion of the 2,6-dioxyanthraquinone moiety in the polymer.
Inventors
- 👤 Gordon W. Calundann
- 👤 Larry F. Charbonneau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:06
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/688; C08G63/02; C08G63/60; C08G63/605
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
122 words
A melt processable wholly aromatic polyester capable of forming an anisotropic melt phase at a temperature below approximately 375° C. consisting essentially of moieties I, II, and III wherein: I is ##STR22## II is ##STR23## and III is ##STR24## where X is selected from at least one member of the group consisting of (a) 1,3-phenylene radicals which optionally are replaced with up to 75 mole percent of 1,4-phenylene radicals based upon the total concentration of 1,3-phenylene and 1,4-phenylene radicals present in said polyester, (b) ##STR25## (c) ##STR26## and (d) ##STR27## and wherein said polyester comprises approximately 15 to 30 mole percent of moiety I, approximately 35 to 70 mole percent moiety II, and approximately 15 to 30 mole percent of moiety III.
Claim 2
Dependent Claim
122 words
A melt processable wholly aromatic polyester capable of forming an anisotropic melt phase at a temperature below approximately 375° C. consisting essentially of moieties I, II, and III wherein: I is ##STR22## II is ##STR23## and III is ##STR24## where X is selected from at least one member of the group consisting of (a) 1,3-phenylene radicals which optionally are replaced with up to 75 mole percent of 1,4-phenylene radicals based upon the total concentration of 1,3-phenylene and 1,4-phenylene radicals present in said polyester, (b) ##STR25## (c) ##STR26## and (d) ##STR27## and wherein said polyester comprises approximately 15 to 30 mole percent of moiety I, approximately 35 to 70 mole percent moiety II, and approximately 15 to 30 mole percent of moiety III.
Claim 3
Dependent Claim
38 words
A polyester according to claim 1 wherein the polymer comprises approximately 20 to 30 mole percent of moiety I, approximately 40 to 60 mole percent of moiety II, and approximately 20 to 30 mole percent of moiety III.
Claim 4
Dependent Claim
19 words
A polyester according to claim 2 wherein the polymer comprises approximately 50 to 60 mole percent of moiety II.
Claim 5
Dependent Claim
18 words
A polyester according to claim 1 wherein the molar quantities of moieties I and III are substantially equal.
Claim 6
Dependent Claim
32 words
A polyester according to claim 1 wherein the polymer comprises approximately 20 mole percent of moiety I, approximately 60 mole percent of moiety II, and approximately 20 mole percent of moiety III.
Claim 7
Dependent Claim
15 words
A fiber which has been melt spun from the wholly aromatic polyester of claim 1.
Claim 8
Dependent Claim
19 words
A fiber which has been melt spun from the wholly aromatic polyester of claim 1 and subsequently thermally treated.
Claim 9
Dependent Claim
18 words
A polyester according to claim 1 wherein the melting temperature of the polymer is below approximately 350° C.
Claim 10
Dependent Claim
101 words
A melt processable wholly aromatic polyester capable of forming an anisotropic melt phase at a temperature below approximately 375° C. consisting essentially of moieties I, II, and III wherein: I is ##STR28## II is ##STR29## and III is ##STR30## where X represents 1,3-phenylene radicals which optionally are replaced with up to 75 mole percent of 1,4-phenylene radicals based upon the total concentration of moiety III in said polyester, and wherein said polyester comprises approximately 15 to 30 mole percent of moiety I, approximately 35 to 70 mole percent of moiety II, and approximately 15 to 30 mole percent of moiety III.
Claim 11
Dependent Claim
101 words
A melt processable wholly aromatic polyester capable of forming an anisotropic melt phase at a temperature below approximately 375° C. consisting essentially of moieties I, II, and III wherein: I is ##STR28## II is ##STR29## and III is ##STR30## where X represents 1,3-phenylene radicals which optionally are replaced with up to 75 mole percent of 1,4-phenylene radicals based upon the total concentration of moiety III in said polyester, and wherein said polyester comprises approximately 15 to 30 mole percent of moiety I, approximately 35 to 70 mole percent of moiety II, and approximately 15 to 30 mole percent of moiety III.
Claim 12
Dependent Claim
36 words
A polyester according to claim 9 wherein said 1,3-phenylene radicals of moiety III are replaced with approximately 25 to 62.5 mole percent of 1,4-phenylene radicals based upon the total concentration of moiety III in said polyester.
Claim 13
Dependent Claim
37 words
A polyester according to claim 9 wherein the polymer comprises approximately 20 to 30 mole percent of moiety I, approximately 40 to 60 percent of moiety II, and approximately 20 to 30 mole percent of moiety III.
Claim 14
Dependent Claim
19 words
A polyester according to claim 11 wherein the polymer comprises approximately 50 to 60 mole percent of moiety II.
Claim 15
Dependent Claim
15 words
A fiber which has been melt spun from the wholly aromatic polyester of claim 9.
Claim 16
Dependent Claim
19 words
A fiber which has been melt spun from the wholly aromatic polyester of claim 9 and subsequently thermally treated.
Claim 17
Dependent Claim
18 words
A polyester according to claim 9 wherein the melting temperature of the polymer is below approximately 350° C.
Claim 18
Dependent Claim
18 words
A polyester according to claim 9 wherein the molar quantities of moieties I and III are substantially equal.
Claim 19
Dependent Claim
96 words
A melt processable wholly aromatic polyester capable of forming an anisotropic melt phase at a temperature below approximately 375° C. consisting essentially of moieties I, II, and III, wherein: I is ##STR31## II is ##STR32## and III is ##STR33## where X represents 1,3-phenylene radicals which optionally are replaced with approximately 25 to 62.5 mole percent of 1,4-phenylene radicals based upon the total concentration of moiety III in said polyester, and wherein said polyester comprises approximately 20 mole percent of moiety I, approximately 60 mole percent of moiety II, and approximately 20 mole percent of moiety III.
Claim 20
Dependent Claim
96 words
A melt processable wholly aromatic polyester capable of forming an anisotropic melt phase at a temperature below approximately 375° C. consisting essentially of moieties I, II, and III, wherein: I is ##STR31## II is ##STR32## and III is ##STR33## where X represents 1,3-phenylene radicals which optionally are replaced with approximately 25 to 62.5 mole percent of 1,4-phenylene radicals based upon the total concentration of moiety III in said polyester, and wherein said polyester comprises approximately 20 mole percent of moiety I, approximately 60 mole percent of moiety II, and approximately 20 mole percent of moiety III.
Claim 21
Dependent Claim
34 words
A polyester according to claim 17 wherein said 1,3-phenylene radicals of moiety III are replaced with approximately 50 mole percent of 1,4-phenylene radicals based upon the total concentration of moiety III in said polyester.
Claim 22
Dependent Claim
15 words
A fiber which has been melt spun from the wholly aromatic polyester of claim 17.
Claim 23
Dependent Claim
19 words
A fiber which has been melt spun from the wholly aromatic polyester of claim 17 and subsequently thermally treated.
Claim 24
Dependent Claim
18 words
A polyester according to claim 17 wherein the melting temperature of the polymer is below approximately 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) | 1983-09-23 | 1984-03-24 | 1984-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-23 | 1988-03-24 | 1988-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-23 | 1992-03-24 | 1992-09-23 | $7700.00 | Window Closed / Lapsed |