US4743630A
Expired / Lapsed
US
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Poly(ester-ether-carbonate)
Assignee: Eastman Chemical Co
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Filing: 1986-08-04
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Granted: 1988-05-10
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Expires: 2006-08-04
Abstract
Abstract Disclosed are new poly(ester-ether-carbonates) which may be prepared by heating aromatic diol polycarbonates and poly(ester-carbonates) with ethylene carbonate, optionally in the presence of a suitable catalyst or promoter.
Inventors
- 👤 William R. Darnell
- 👤 Winston J. Jackson, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:48
CPC Classifications
C; C08; C08G; C08G64/00; C08G64/18; C08G64/183
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
129 words
A composition of matter comprising a mixture of the following repeating units: ##STR26## wherein a, b, and c are each integers of a magnitude such as to result in an inherent viscosity of said composition of about 0.05-2.00, wherein said inherent viscosity is determined at 25° C. in a 40/25/35 weight mixture of p-chlorophenol/phenol/1,1,2,2-tetrachloroethane at a concentration of 0.1 g/100 mL; Ar is arylene having 6-30 carbon atoms; R 1 , R 2 , and R 3 are each ##STR27## wherein Ar' is arylene of 6-16 carbon atoms; and ##STR28## is present in amounts of greater than 0 to less than 100% and ##STR29## is present in amounts of greater than 0 to less than 100%, with the proviso that R 2 is ##STR30## or a mixture of ##STR31##
Claim 2
Dependent Claim
129 words
A composition of matter comprising a mixture of the following repeating units: ##STR26## wherein a, b, and c are each integers of a magnitude such as to result in an inherent viscosity of said composition of about 0.05-2.00, wherein said inherent viscosity is determined at 25° C. in a 40/25/35 weight mixture of p-chlorophenol/phenol/1,1,2,2-tetrachloroethane at a concentration of 0.1 g/100 mL; Ar is arylene having 6-30 carbon atoms; R 1 , R 2 , and R 3 are each ##STR27## wherein Ar' is arylene of 6-16 carbon atoms; and ##STR28## is present in amounts of greater than 0 to less than 100% and ##STR29## is present in amounts of greater than 0 to less than 100%, with the proviso that R 2 is ##STR30## or a mixture of ##STR31##
Claim 3
Dependent Claim
9 words
A foamed structure comprising the composition of claim 1.
Claim 4
Dependent Claim
8 words
A film comprising the composition of claim 1.
Claim 5
Dependent Claim
8 words
A fiber comprising the composition of claim 1.
References Cited (Backward Citations)
US4623675A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-10 | 1991-11-09 | 1992-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-10 | 1995-11-09 | 1996-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-10 | 1999-11-09 | 2000-05-10 | $7700.00 | Window Closed / Lapsed |