US5003041A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blends of poly(ethylene terephthalate) and trans-4,4'-stilbenedicarboxylic acid polyesters
Assignee: EIDP Inc
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Filing: 1988-12-23
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Granted: 1991-03-26
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Expires: 2008-12-23
Abstract
Abstract Disclosed are blends of about 99 to about 10 weight % of poly(ethylene terephthalate) and about 1 to about 90 weight % of a polyester of trans-4,4'-stilbenedicarboxylic acid and at least one aliphatic glycol having 2 to 16 carbon atoms. The blends have improved gas barrier properties and improved chemical resistance.
Inventors
- 👤 John C. Morris
- 👤 Winston J. Jackson, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:25
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/18; C08L; C08L67/00; C08L67/02; C08L67/06; C08J2367/00; C08J2367/02; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10S525/00; Y10S525/933
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
97 words
A polymer blend comprising (A) about 99 to about 10 weight % of poly(ethylene terephthalate) having an inherent viscosity of greater than or equal to about 0.4 determined at 25° C. in 25/35/40 (wt./wt./wt.) phenol/tetrachloroethane/ p-chlorophenol at a concentration of 0.1 g/100 mL, and (b) about 1 to about 90 weight % of a homopolyester comprising repeating units of trans-4,4'-stilbenedicarboxylic acid, and diethylene glycol or 1,6-hexanediol, wherein said homopolyester has an inherent viscosity of greater than or equal to about 0.6 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
97 words
A polymer blend comprising (A) about 99 to about 10 weight % of poly(ethylene terephthalate) having an inherent viscosity of greater than or equal to about 0.4 determined at 25° C. in 25/35/40 (wt./wt./wt.) phenol/tetrachloroethane/ p-chlorophenol at a concentration of 0.1 g/100 mL, and (b) about 1 to about 90 weight % of a homopolyester comprising repeating units of trans-4,4'-stilbenedicarboxylic acid, and diethylene glycol or 1,6-hexanediol, wherein said homopolyester has an inherent viscosity of greater than or equal to about 0.6 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
127 words
A polymer blend comprising (A) about 99 to about 10 weight % of poly(ethylene terephthalate) having an inherent viscosity of greater than or equal to about 0.4 determined at 25° C. in 25/35/40 (wt./wt./wt.) phenol/tetrachloroethane/p-chlorophenol at a concentration of 0.1 g/100 ml, and (B) about 1 to about 90 weight % of a polyester comprising repeating units of trans-4,4'-stilbenedicarboxylic acid and a glycol component comprising about 60 to 95 mole % 1,4-butanediol and about 5 to 40 mole % ethylene glycol or about 65 to 95 mole % 1,6-hexanediol and about 5 to 35 mole % ethylene glycol wherein said polyester has an inherent viscosity greater than or equal to about 0.1 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 4
Dependent Claim
127 words
A polymer blend comprising (A) about 99 to about 10 weight % of poly(ethylene terephthalate) having an inherent viscosity of greater than or equal to about 0.4 determined at 25° C. in 25/35/40 (wt./wt./wt.) phenol/tetrachloroethane/p-chlorophenol at a concentration of 0.1 g/100 ml, and (B) about 1 to about 90 weight % of a polyester comprising repeating units of trans-4,4'-stilbenedicarboxylic acid and a glycol component comprising about 60 to 95 mole % 1,4-butanediol and about 5 to 40 mole % ethylene glycol or about 65 to 95 mole % 1,6-hexanediol and about 5 to 35 mole % ethylene glycol wherein said polyester has an inherent viscosity greater than or equal to about 0.1 determined at 25° C. in 25/35/40 (wt./wt./wt.) phenol/tetrachloroethane/p-chlorophenol at a concentration of 0.1 g/100 ml.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-03-25 | 1994-09-24 | 1995-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-03-25 | 1998-09-24 | 1999-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-03-25 | 2002-09-24 | 2003-03-26 | $7700.00 | Window Closed / Lapsed |