Claims
- 1. A polyimide copolymer prepared by reacting a mixture of 3,4'-oxydianiline (ODA) and 1,3-bis(3-aminophenoxy)benzene (APB) with 3,3',4,4'-biphenylcarboxylic dianhydride (BPDA), and terminating the reaction with an effective amount of a reactive endcapper.
- 2. A polyimide copolymer according to claim 1, wherein the mixture of ODA and APB has a ratio of ODA to APB within the range of about 95:5 to about 50:50.
- 3. A polyimide copolymer according to claim 2, wherein the ratio of ODA to APB is within the range of about 90:10 to about 70:30.
- 4. A polyimide copolymer according to claim 3, wherein the ratio of ODA to APB is about 85:15.
- 5. A polyimide copolymer according to claim 2, wherein the reactive endcapper is a member selected from the group consisting of 4-phenylethynyl phthalic anhydride (PEPA), 3-aminophenoxy-4'-phenylethynylbenzophenone (3-APEB), maleic anhydride (MA) and 5-norbornene-2,3-dicarboxylic anhydride (NA).
- 6. A polyimide copolymer according to claim 4, wherein the reactive endcapper is a member selected from the group consisting of 4-phenylethynyl phthalic anhydride (PEPA), 3-aminophenoxy-4'-phenylethynylbenzophenone (3-APEB), maleic anhydride (MA) and 5-norbornene-2,3-dicarboxylic anhydride (NA).
- 7. A polyimide copolymer according to claim 5, wherein the polyimide copolymer has a molecular weight within the range of about 1500 to about 15,000 g/mole.
- 8. A polyimide copolymer according to claim 7, wherein the molecular weight is within the range of about 2500 to about 10,000 g/mole.
- 9. A molding prepared from a polyimide copolymer according to claim 2.
- 10. A film prepared from a polyimide copolymer according to claim 2.
- 11. An adhesive prepared from a polyimide copolymer according to claim 2.
- 12. A graphite composite prepared from a polyimide copolymer according to claim 2.
- 13. A plate coating composition prepared from a polyimide copolymer according to claim 2.
- 14. A wire coating composition prepared from a polyimide copolymer according to claim 2.
ORIGIN OF THE INVENTION
The invention described herein was made by an employee of the United States Government and may be manufactured and used by or for the Government for governmental purposes without the payment of any royalties thereon or therefor.
US Referenced Citations (5)
Number |
Name |
Date |
Kind |
4595548 |
St. Clair et al. |
Jun 1986 |
|
4603061 |
St. Clair et al. |
Jul 1986 |
|
4837300 |
St. Clair et al. |
Jun 1989 |
|
4895972 |
Stoakley et al. |
Jan 1990 |
|
5147966 |
St. Clair et al. |
Sep 1992 |
|
Non-Patent Literature Citations (1)
Entry |
Polymer Preprint vol. 35, No. 1, 3, 1994, pp. 539-554 Bryant et al. |