US4499257A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Poly(ester-carbonate)s
Assignee: BP Corp North America Inc
•
Filing: 1983-04-18
•
Granted: 1985-02-12
•
Expires: 2003-04-18
Abstract
Abstract This invention is directed to novel poly(ester-carbonate)s containing repeating units derived from bis(3,5-dimethyl-4-hydroxyphenyl) sulfone and up to 80% of another dihydric phenol linked together by carbonate and arylate units. The invention is also directed to a process for preparation of this polymer.
Inventors
- 👤 Louis M. Maresca
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:42
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/64
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
197 words
A poly(ester-carbonate) resin consisting essentially of from about 20 weight percent to 100 weight percent of repeating units (I) having the formula ##STR7## and from 0 weight percent to about 80 weight percent of repeating units (II) having the formula ##STR8## wherein A is selected from alkyl groups of 1 to 4 carbon atoms, chlorine or bromine, each z, independently, has a value of from 0 to 4 inclusive, n has a value of 0 or 1, and R 1 is a divalent saturated or unsaturated aliphatic hydrocarbon radical, or a cycloalkylidene or cycloalkylene radical having up to and including 9 carbon atoms, O, CO, SO 2 , S or a direct bond, with the proviso that when R 1 is SO 2 , then repeating unit (II) is not the same as repeating unit (I); the repeating units (I) and the repeating units (II) are connected by interbonding units, X units of the formula: ##STR9## and one or more of Y units of the formula: ##STR10## and Z units of the formula: ##STR11## wherein the mole ratio of X units to the combination of one or more Y and Z units is about 0.25 to 9.
Claim 2
Dependent Claim
197 words
A poly(ester-carbonate) resin consisting essentially of from about 20 weight percent to 100 weight percent of repeating units (I) having the formula ##STR7## and from 0 weight percent to about 80 weight percent of repeating units (II) having the formula ##STR8## wherein A is selected from alkyl groups of 1 to 4 carbon atoms, chlorine or bromine, each z, independently, has a value of from 0 to 4 inclusive, n has a value of 0 or 1, and R 1 is a divalent saturated or unsaturated aliphatic hydrocarbon radical, or a cycloalkylidene or cycloalkylene radical having up to and including 9 carbon atoms, O, CO, SO 2 , S or a direct bond, with the proviso that when R 1 is SO 2 , then repeating unit (II) is not the same as repeating unit (I); the repeating units (I) and the repeating units (II) are connected by interbonding units, X units of the formula: ##STR9## and one or more of Y units of the formula: ##STR10## and Z units of the formula: ##STR11## wherein the mole ratio of X units to the combination of one or more Y and Z units is about 0.25 to 9.
Claim 3
Dependent Claim
17 words
A poly(ester-carbonate) resin as defined in claim 1 wherein repeating unit (II) is of the formula: ##STR12##
Claim 4
Dependent Claim
38 words
A process for making a poly(ester-carbonate) resin which comprises condensing a mixture of a dihydric phenol and bis(3,5-dimethyl-4-hydroxyphenyl)sulfone with a carbonate precursor and one of more of terephthalic and isophthalic acids in the presence of a condensation catalyst.
Claim 5
Dependent Claim
38 words
A process for making a poly(ester-carbonate) resin which comprises condensing a mixture of a dihydric phenol and bis(3,5-dimethyl-4-hydroxyphenyl)sulfone with a carbonate precursor and one of more of terephthalic and isophthalic acids in the presence of a condensation catalyst.
Claim 6
Dependent Claim
11 words
The process of claim 3 wherein the dihydric phenol is 2,2-bis(4-hydroxyphenyl)propane.
References Cited (Backward Citations)
US3169121A
Cited
US3207814A
Cited
US3234167A
Cited
US3652499A
Cited
US3729447A
Cited
US4156069A
Cited
US4130548A
Cited
US4252939A
Cited
US4260731A
Cited
US4194038A
Cited
US4219635A
Cited
US4238597A
Cited
US4238596A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-02-12 | 1988-08-13 | 1989-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-12 | 1992-08-13 | 1993-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-12 | 1996-08-13 | 1997-02-12 | $7700.00 | Window Closed / Lapsed |