US4713439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Poly(carbonate-imide) polymer
Assignee: National Aeronautics and Space Administration
•
Filing: 1986-02-27
•
Granted: 1987-12-15
•
Expires: 2006-02-27
Abstract
Abstract A novel series of polymers and copolymers based on a polyimide backbone with the incorporation of carbonate moieties along the backbone. The process for preparing these polymers and copolymers is also disclosed as is a novel series of dinitrodiphenyl carbonates and diaminodiphenyl carbonates. The novel polymers and copolymers exhibit high temperature capability and because of the carbonate unit, many exhibit a high degree of order and/or crystallinity.
Inventors
- 👤 Terry L. St. Clair
- 👤 Shubha Maudgal
- 👤 J. Richard Pratt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:17
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/44
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
74 words
A poly(carbonate-imide) polymer comprising recurring units having the formula: ##STR8## where R' comprises a monovalent radical, having one to twenty carbon atoms, selected from hydrogen, alkyl, aryl, alkoxy, halogenated hydrocarbon, and N,N-dialkylamino; Y is nil or a divalent radical selected from ##STR9## R" comprises a monovalent radical, having one to twenty carbon atoms, selected from hydrogen, alkyl, aryl and halogenated hydrocarbon; and R'" comprises a divalent radical selected from alkylidene, arylidene, and halogenated hydrocarbon.
Claim 2
Dependent Claim
74 words
A poly(carbonate-imide) polymer comprising recurring units having the formula: ##STR8## where R' comprises a monovalent radical, having one to twenty carbon atoms, selected from hydrogen, alkyl, aryl, alkoxy, halogenated hydrocarbon, and N,N-dialkylamino; Y is nil or a divalent radical selected from ##STR9## R" comprises a monovalent radical, having one to twenty carbon atoms, selected from hydrogen, alkyl, aryl and halogenated hydrocarbon; and R'" comprises a divalent radical selected from alkylidene, arylidene, and halogenated hydrocarbon.
Claim 3
Dependent Claim
61 words
A poly (carbonate-imide) polymer in accordance with claim 1 comprising recurring units, a, as in claim 1, of the formula: ##STR10## and recurring units, b, of the formula: ##STR11## where X is nil or a divalent radical selected from ##STR12## and Z comprises a divalent radical having the formula ##STR13## and where the ratio a:b an vary between 10.0 and 1-9.
Claim 4
Dependent Claim
19 words
The poly(carbonate-imide) polymer of claim 1 wherein the recurring unit comprises a carbonate-imide represented by the general formula: ##STR14##
Claim 5
Dependent Claim
19 words
The poly(carbonate-imide) polymer of claim 1 wherein the recurring unit comprises a carbonate-imide represented by the general formula: ##STR15##
Claim 6
Dependent Claim
19 words
The poly(carbonate-imide) polymer of claim 1 wherein the recurring unit comprises a carbonate-imide represented by the general formula: ##STR16##
Claim 7
Dependent Claim
20 words
The poly(carbonate-imide) polymer of claim 2 wherein the recurring carbonate-imide unit comprises a carbonate-imide represented by the general formula: ##STR17##
Claim 8
Dependent Claim
20 words
The poly(carbonate-imide) polymer of claim 2 wherein the recurring carbonate-imide unit comprises a carbonate-imide represented by the general formula: ##STR18##
Claim 9
Dependent Claim
20 words
The poly(carbonate-imide) polymer of claim 2 wherein the recurring carbonate-imide unit comprises a carbonate-imide represented by the general formula: ##STR19##
Claim 10
Dependent Claim
31 words
The poly (carbonate-imide) polymer of claim 2 wherein the recurring carbonate-imide unit comprises a carbonate-imide represented by the formula: ##STR20## where R is a monovalent radical selected from methyl and isopropyl.
Claim 11
Dependent Claim
120 words
A process for preparing a poly (carbonate-imide) polymer containing the recurring units: ##STR21## where R' comprises a monovalent radical, having one to twenty carbon atoms, selected from hydrogen, alkyl, aryl, alkoxy, halogenated hydrocarbon, and N,N-dialkylamino; Y is nil or a divalent radical selected from ##STR22## R" comprises a monovalent radical, having one to twenty carbon atoms, selected from hydrogen, alkyl, aryl, and halogenated hydrocarbon; and R'" comprises a divalent radical selected from alkylidene, arylidene, and halogenated hydrocarbon; comprising the steps of reacting an aromatic tetracarboxylic acid dianhydride having the formula: ##STR23## with a diaminodiphenylcarbonate having the formula: ##STR24## to form the poly(carbonate-amide acid) of the formula ##STR25## and then heating to effect cyclization of said diacid to produce said poly(carbonate-imide).
Claim 12
Dependent Claim
120 words
A process for preparing a poly (carbonate-imide) polymer containing the recurring units: ##STR21## where R' comprises a monovalent radical, having one to twenty carbon atoms, selected from hydrogen, alkyl, aryl, alkoxy, halogenated hydrocarbon, and N,N-dialkylamino; Y is nil or a divalent radical selected from ##STR22## R" comprises a monovalent radical, having one to twenty carbon atoms, selected from hydrogen, alkyl, aryl, and halogenated hydrocarbon; and R'" comprises a divalent radical selected from alkylidene, arylidene, and halogenated hydrocarbon; comprising the steps of reacting an aromatic tetracarboxylic acid dianhydride having the formula: ##STR23## with a diaminodiphenylcarbonate having the formula: ##STR24## to form the poly(carbonate-amide acid) of the formula ##STR25## and then heating to effect cyclization of said diacid to produce said poly(carbonate-imide).
Claim 13
Dependent Claim
80 words
A process for preparing a poly(carbonate-imide) polymer in accordance with claim 10 containing recurring units, a, as in claim 11, of the formula: ##STR26## and recurring units, b, of the formula: ##STR27## where X' comprises a monovalent radical selected from nil, ##STR28## Z' comprises a monovalent radical having the formula: ##STR29## and where the ratio a:b can vary between 10:0 and 1-9; comprising the additional step of reacting a dianiline having the formula: ##STR30## with said dianhydride and said diaminophenylcarbonate.
Claim 14
Dependent Claim
17 words
The process of claim 11 in which said dianiline comprises oxydianiline and said dianhydride comprises benzophenonetetracarboxylic dianhydride.
Claim 15
Dependent Claim
40 words
A diphenylcarbonate composition comprising diphenylcarbonates having the formula; ##STR31## where R' comporiss a monovalent radical, having one to twenty carbon atoms, selected from hydrogen, alkyl, aryl, alkoxy, halogenated hydrocarbon, and N,N-dialkylamino; and R"" comprises a monovalent radical selected from ##STR32##
Claim 16
Dependent Claim
40 words
A diphenylcarbonate composition comprising diphenylcarbonates having the formula; ##STR31## where R' comporiss a monovalent radical, having one to twenty carbon atoms, selected from hydrogen, alkyl, aryl, alkoxy, halogenated hydrocarbon, and N,N-dialkylamino; and R"" comprises a monovalent radical selected from ##STR32##
References Cited (Backward Citations)
US3705870A
Cited
US4063984A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-12-14 | 1991-06-15 | 1991-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-14 | 1995-06-15 | 1995-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-14 | 1999-06-15 | 1999-12-15 | $7700.00 | Window Closed / Lapsed |