US4310652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Melt processable poly(ester carbonate) with high glass transition temperature
Assignee: Honeywell International Inc
•
Filing: 1980-03-24
•
Granted: 1982-01-12
•
Expires: 2000-03-24
Abstract
Abstract Poly(ester aromatic dihydric alcohol) polymers having carbonate moieties, aromatic or cycloaliphatic dicarboxylic acid moieties and carbonate moieties and having high glass transition temperatures (over 100 DEG C.) and being melt processable. At least part of the aromatic dihydric alcohol moieties have the 4-carbon of each of two phenoxies covalently bonded to the same ring carbon of a carbocyclic or heterocyclic moiety. Representative poly(ester carbonates) are formed from bisphenol-A, phenolphthalein, terephthaloyl chloride and phosgene.
Inventors
- 👤 Bruce T. DeBona
- 👤 Dusan C. Prevorsek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:33
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/64
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
89 words
A poly(ester carbonate) consisting essentially of about equimolar amounts of moieties derived from aromatic diols and a combination of carbonate moieties and aromatic or cycloalphatic diacyl moieties, with at least about 5 mol percent of the moieties derived from aromatic diols being a bisphenoxy moiety having the 4-carbon of each of two phenoxies covalently bonded to the same ring carbon of a carbocyclic of heterocyclic moiety, said carbocyclic or heterocyclic moiety having 5 to 14 cyclic atoms in 1 to 3 rings and being inert under polymerization reaction conditions.
Claim 2
Dependent Claim
89 words
A poly(ester carbonate) consisting essentially of about equimolar amounts of moieties derived from aromatic diols and a combination of carbonate moieties and aromatic or cycloalphatic diacyl moieties, with at least about 5 mol percent of the moieties derived from aromatic diols being a bisphenoxy moiety having the 4-carbon of each of two phenoxies covalently bonded to the same ring carbon of a carbocyclic of heterocyclic moiety, said carbocyclic or heterocyclic moiety having 5 to 14 cyclic atoms in 1 to 3 rings and being inert under polymerization reaction conditions.
Claim 3
Dependent Claim
37 words
The poly(ester carbonate) of claim 1 wherein the moieties derived from aromatic diols comprise about 5 to about 35 mol percent moieties derived from phenolphthalein and about 70 to about 95 mol percent moieties derived from bisphenol-A.
Claim 4
Dependent Claim
30 words
The poly(ester carbonate) of claim 1 or claim 2 wherein the aromatic or cycloaliphatic diacyl moieties are selected from the group consisting of terephthaloyl moieties, isophthaloyl moieties and mixtures thereof.
Claim 5
Dependent Claim
18 words
The poly(ester carbonate) of claim 1 or claim 2 wherein the aromatic or cycloaliphatic diacyl moieties are terephthaloyl.
Claim 6
Dependent Claim
38 words
The poly(ester carbonate) of claim 4 wherein the moieties derived from aromatic diols comprise between about 10 and about 25 mol percent moieties derived from phenolphthalein and about 75 to about 90 mol percent moieties derived from bisphenol-A.
Claim 7
Dependent Claim
35 words
The poly(ester-carbonate) of claim 1 wherein said bisphenoxy moiety is derived from the condensation of phenol with a carboxyl-containing compound selected from the group consisting of phthalic anhydride, cyclohexanone, fluorenone, indanone, tetralone, and mixtures thereof.
References Cited (Backward Citations)
US3169121A
Cited
US3036037A
Cited
US3036036A
Cited
US3036039A
Cited
GB1179400A
Cited
US4156069A
Cited
US4078999A
Cited
US4105633A
Cited
US4167536A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-01-11 | 1985-07-13 | 1986-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-11 | 1989-07-13 | 1990-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-11 | 1993-07-13 | 1994-01-12 | $7700.00 | Window Closed / Lapsed |