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US4728718A
Expired / Lapsed
US
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Polyesters of trans-4,4'-stilbenedicarboxylic acid, 1,6-hexanediol and 1,4-cyclohexanedimethanol
Assignee: EIDP Inc
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Filing: 1987-01-02
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Granted: 1988-03-01
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Expires: 2007-01-02
Abstract
Abstract The polyesters of 100 mol % trans-4,4'-stilbenedicarboxylic acid, 55 to 5 mol % 1,4-cyclohexanedimethanol, and 45 to 95 mol % 1,6-hexanediol can be injection-molded to give shaped objects having exceptionally high tensile strength and heat resistance. Many of the polyesters also have excellent hydrolytic stability and chemical resistance. The polyesters of this invention can be molded, extruded into film, or spun into fibers having these properties.
Inventors
- 👤 John C. Morris
- 👤 Winston J. Jackson, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:11
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/52; C08G63/54
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
73 words
A copolyester comprising repeating unit from at leasst 80 mol % trans-4,4'-stilbenedicarboxylic acid, repeating units from about 55-5 mol % 1,4-cyclohexanedimethanol and repeating units from about 45-95 mol % 1,6-hexanediol, the total mole % of said acid components and said glycol components each being 100 mol %, and said polyester having an inherent viscosity of 0.3 or more determined at 25° C. in 25/35/40 (wt/wt/wt) phenol/tetrachloroethane/p-chlorophenol at a concentration of 0.1 g/100 mL.
Claim 2
Dependent Claim
73 words
A copolyester comprising repeating unit from at leasst 80 mol % trans-4,4'-stilbenedicarboxylic acid, repeating units from about 55-5 mol % 1,4-cyclohexanedimethanol and repeating units from about 45-95 mol % 1,6-hexanediol, the total mole % of said acid components and said glycol components each being 100 mol %, and said polyester having an inherent viscosity of 0.3 or more determined at 25° C. in 25/35/40 (wt/wt/wt) phenol/tetrachloroethane/p-chlorophenol at a concentration of 0.1 g/100 mL.
Claim 3
Dependent Claim
20 words
A copolyester according to claim 1 wherein the trans-4,4'-stilbenedicarboxylic acid is present in an amount of about 100 mol %.
Claim 4
Dependent Claim
30 words
A copolyester according to claim 1 wherein the acid component comprises up to 20 mol % of at least one other aromatic dicarboxylic acid having 8 to 20 carbon atoms.
Claim 5
Dependent Claim
13 words
A copolyester according to claim 1 wherein the I.V. is greater than 0.6.
Claim 6
Dependent Claim
8 words
A fiber comprising the copolyester of claim 1.
Claim 7
Dependent Claim
8 words
A film comprising the copolyester of claim 1.
Claim 8
Dependent Claim
9 words
A molded object comprising the copolyester of claim 1.
References Cited (Backward Citations)
US4578453A
Cited
US4551520A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-03-01 | 1991-08-31 | 1992-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-01 | 1995-08-31 | 1996-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-01 | 1999-08-31 | 2000-03-01 | $7700.00 | Window Closed / Lapsed |