US4225688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolyester composition containing poly(ethylene cyclohexane dimethylene terephthalate), having superior solvent and impact resistance
Assignee: Baxter International Inc
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Filing: 1978-11-09
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Granted: 1980-09-30
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Expires: 1998-11-09
Abstract
Abstract A copolyester compositon which exhibits good bonding characteristics to polyvinyl chloride, good impact resistance, and improved resistance to crazing or cracking in the presence of solvents such as alcohol. The composition consists essentially of (a) 80 to 95 percent by weight of a generally rigid poly(ethylene cyclohexanedimethylene terephthalate) in which from 2 to 20 molar parts of ethylene units are present per one molar part of cyclohexanedimethylene units, and (b) from 5 to 20 percent by weight of a flexible copolymer containing alternating covalently bonded blocks of poly(butylene terephthalate) and poly(1,4-butylene ether).
Inventors
- 👤 T. Michael Dennehey
- 👤 Dwight Dixon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:06
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02; Y; Y10; Y10S; Y10S525/00; Y10S525/931
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
83 words
A copolyester composition which exhibits good bonding characteristics to polyvinyl chloride plastics, good impact resistance, and improved resistance to alcohols, which consists essentially of: (a) from 80 to 95 percent by weight of a generally rigid poly(ethylene cyclohexanedimethylene terephthalate) in which from 2 to 20 molar parts of ethylene units are present per one molar part of cyclohexane dimethylene units; and (b) from 5 to 20 percent by weight of flexible copolymer containing alternating covalently bonded blocks of poly(butylene terephthalate) and poly(1,4-butylene oxide).
Claim 2
Dependent Claim
83 words
A copolyester composition which exhibits good bonding characteristics to polyvinyl chloride plastics, good impact resistance, and improved resistance to alcohols, which consists essentially of: (a) from 80 to 95 percent by weight of a generally rigid poly(ethylene cyclohexanedimethylene terephthalate) in which from 2 to 20 molar parts of ethylene units are present per one molar part of cyclohexane dimethylene units; and (b) from 5 to 20 percent by weight of flexible copolymer containing alternating covalently bonded blocks of poly(butylene terephthalate) and poly(1,4-butylene oxide).
Claim 3
Dependent Claim
33 words
The copolyester of claim 1 in which said flexible copolymer exhibits a melt flow rate of 5 to 10 grams per 10 minutes at 200° C. and a 2160 gram load (ASTM D1238).
Claim 4
Dependent Claim
24 words
The copolyester of claim 2 in which said generally rigid copolymer is a non-crystalline material with a glass transition temperature of appoximately 80° C.
Claim 5
Dependent Claim
18 words
The copolyester of claim 1 in which essentially 10 percent by weight of said flexible copolymer is present.
Claim 6
Dependent Claim
11 words
The copolyester of claim 1 in which multiple phases are present.
Claim 7
Dependent Claim
16 words
The copolyester of claim 5 in which the degradation temperature is in excess of 420° F.
Claim 8
Dependent Claim
24 words
The copolyester of claim 1 in which said generally rigid copolymer is a non-crystalline material with a glass transition temperature of approximately 80° 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) | 1983-09-30 | 1984-03-31 | 1984-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-30 | 1988-03-31 | 1988-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-30 | 1992-03-31 | 1992-09-30 | $7700.00 | Window Closed / Lapsed |