Claims
- 1. A polyimidebenzoxazole film comprising, in polymerized form, pyromellitic dianhydride, an aromatic diaminobenzoxazole, selected from the group consisting of 2,6-(4,4'-diaminodiphenyl)benzobisoxazole, 5-amino -2-(p-aminophenyl) benzoxazole, 5-amino-2-(m-aminophenyl)benzoxazole, 2,2'-p-phenylenebis(5-aminobenzoxazole) and mixtures thereof and a bifunctional chain extender wherein said film is a coating on a substrate.
- 2. The polyimidebenzoxazole film of claim 1 wherein the aromatic diaminobenzoxazole is selected from the group consisting of 5-amino-2-(p-aminophenyl)-benzoxazole, 2,6-(4,4'-diaminophenyl)benzo[1,2-d:5,4-d]-bisoxazole and mixtures thereof.
- 3. The polyimidebenzoxazole film of claim 2 wherein the aromatic diaminobenzoxazole is 5-amino-2-(p-aminophenyl) benzoxazole.
- 4. The polyimidebenzoxazole film of claim 1 wherein the bifunctional chain extender is H.sub.2 N--M--C(R).dbd.C(R).sub.2, H.sub.2 N--M--C.tbd.C(R), ##STR21## where M' is a divalent organic radical and R is hydrogen, methyl or phenyl.
- 5. The polyimidebenzoxazole film of claim 1 wherein the bifunctional chain extender is maleic anhydride, 4-aminobenzocyclobutene, nadic anhydride, propylamine, benzocyclobutene or phenylethynlaniline.
- 6. The polyimidebenzoxazole film of claim 5 wherein the bifunctional chain extender is maleic anhydride.
- 7. The polyimidebenzoxazole film of claim 2 wherein the bifunctional chain extender is H.sub.2 N--M--C(R).dbd.C(R).sub.2, H.sub.2 N--M--C.tbd.C(R), ##STR22## where M' is a divalent organic radical and R is hydrogen, methyl or phenyl.
- 8. The polyimidebenzoxazole film of claim 2 wherein the bifunctional chain extender is maleic anhydride, 4-aminobenzocyclobutene, nadic anhydride, propylamine, benzocyclobutene or phenylethynlaniline.
- 9. The polyimidebenzoxazole film of claim 8 wherein the bifunctional chain extender is maleic anhydride.
- 10. The polyimidebenzoxazole film of claim 3 wherein the bifunctional chain extender is H.sub.2 N--M--C(R).dbd.C(R).sub.2, H.sub.2 N--M--C.tbd.C(R), ##STR23## where M' is a divalent organic radical and R is hydrogen, methyl or phenyl.
- 11. The polyimidebenzoxazole film of claim 3 wherein the bifunctional chain extender is maleic anhydride, 4-aminobenzocyclobutene, nadic anhydride, propylamine, benzocyclobutene or phenylethynlaniline.
- 12. The polyimidebenzoxazole film of claim 10 wherein the bifunctional chain extender is maleic anhydride.
- 13. The polyimidebenzoxazole film of claim 1 wherein the substrate is glass, aluminum, stainless steel, silicon, copper or a tetrafluoroethylene fluorocarbon polymer.
- 14. The polyimidebenzoxazole film of claim 3 wherein the substrate is glass, aluminum, stainless steel, silicon, copper or a tetrafluoroethylene fluorocarbon polymer.
- 15. The polyimidebenzoxazole film of claim 4 wherein the substrate is glass, aluminum, stainless steel. silicon, copper or a tetrafluoroethylene fluorocarbon polymer.
- 16. The polyimidebenzoxazole film of claim 12 wherein the substrate is glass, aluminum, stainless steel, silicon, copper or a tetrafluoroethylene fluorocarbon polymer.
Parent Case Info
This application is a continuation of prior application Ser. No. 08/428,815 filed Apr. 24, 1995 which is now U.S. Pat. No. 5,741,585.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
5741585 |
Harris et al. |
Apr 1998 |
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Continuations (1)
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Number |
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428815 |
Apr 1995 |
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