US4983706A
Expired / Lapsed
US
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Interfacial process comprising reacting a dihydric phenol, a carbonate precursor and an aliphatic alpha omega dicarboxylic salt
Assignee: SABIC Global Technologies BV
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Filing: 1990-01-30
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Granted: 1991-01-08
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Expires: 2010-01-30
Abstract
Abstract A process which comprises reacting interfacially a dihydric phenol, a carbonate precursor and a prior prepared salt of an aliphatic alpha omega dicarboxylic acid having from 8 to about 20 carbon atoms thereby producing a copolyestercarbonate.
Inventors
- 👤 Luca P. Fontana
- 👤 Paul W. Buckley
- 👤 Denise Y. Harris
- 👤 Eugene P. Boden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:57
CPC Classifications
C; C08; C08G; C08G64/00; C08G64/04; C08G64/06; C08G63/00; C08G63/64
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
36 words
A process which comprises reacting interfacially a dihydric phenol, a carbonate precursor and a prior prepared salt of an aliphatic alpha omega dicarboxylic acid having from 8 to about 20 carbon atoms thereby producing a copolyestercarbonate.
Claim 2
Dependent Claim
36 words
A process which comprises reacting interfacially a dihydric phenol, a carbonate precursor and a prior prepared salt of an aliphatic alpha omega dicarboxylic acid having from 8 to about 20 carbon atoms thereby producing a copolyestercarbonate.
Claim 3
Dependent Claim
20 words
The process in accordance with claim 1 wherein at least about 99% of the diacid is incorporated with the copolyestercarbonate.
Claim 4
Dependent Claim
18 words
The process in accordance with claim 1 wherein essentially all of the diacid is incorporated into the copolyestercarbonate.
Claim 5
Dependent Claim
13 words
The process in accordance with claim 2 wherein the dihydric phenol is bisphenol-A.
Claim 6
Dependent Claim
13 words
The process in accordance with claim 2 wherein the carbonate precursor is phosgene.
Claim 7
Dependent Claim
21 words
The process in accordance with claim 2 wherein the process is carried out at pH above or equal to about 10.
Claim 8
Dependent Claim
46 words
The process in accordance with claim 2 wherein 0 to 95% of the carbonate precursor addition time is carried out at a pH of from about 8 to 8.5 with the remainder of the carbonate precursor addition time at a pH of about 10 to 12.
Claim 9
Dependent Claim
15 words
The process in accordance with claim 2 wherein the salt is an alkali metal salt.
Claim 10
Dependent Claim
12 words
The process in accordance with claim 8 wherein the salt is sodium.
Claim 11
Dependent Claim
28 words
The process in accordance with claim 2 wherein the salt of the dicarboxylic acid is from about 2 to about 30 mole percent of the dihydric phenol reactant.
References Cited (Backward Citations)
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US4238596A
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US4238597A
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US4628081A
Cited
US4677183A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-01-07 | 1994-07-09 | 1995-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-07 | 1998-07-09 | 1999-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-07 | 2002-07-09 | 2003-01-08 | $7700.00 | Window Closed / Lapsed |