Claims
- 1. A poly(aryl ether ketone) of the following formala: ##STR20## where Ar is a divalent aromatic residue containing electron-withdrawing groups in positions ortho and/or para relative to the carbons bounded to the ether functions with the proviso that Ar cannot be the residuum of 1,4-bis(p-fluorobenzoyl)benzene and y is greater than 1.
- 2. A poly(aryl ether ketone) as defined in claim 1 wherein Ar is either one or a combination of ##STR21## wherein m is 1 to 3.
- 3. A poly(aryl ether ketone) of the following formula: ##STR22## wherein Ar' is the residue of a diphenol with the proviso that it be different from the residuum of hydroquinone, y is greater than 1, and n is at least 2.
- 4. A poly(aryl ether ketone) as defined in claim 3 where Ar' is either one or a combination of ##STR23##
- 5. A process for preparing the chain-extended poly(aryl ether ketone) of claim 1 which comprises:
- (a) reacting an excess of hydroquinone with 4,4'-dihalo or dinitro diketone in the presence of a base and in an aprotic solvent to yield a hydroxyl-terminated intermediate, and
- (b) further chain-extending the intermediate obtained in step (a) with an activated aromatic dihalo or dinitro compound which is different from 1,4 bis(p-halobenzoyl)benzene 01 1,4-bis(p-nitrobenzoyl) benzene, in an aprotic solvent and in the presence of a base.
- 6. A process for preparing the chain extended poly(aryl ether ketone) of claim 3 which comprises:
- (a) reacting an excess of 1,4 bis(p-halobenzoyl)benzene or 1,4-bis(p-nitrobenzoyl) benzene with hydroquinone in the presence of a base and in an aprotic solvent to yield a dihalo or dinitro terminated intermediate, and
- (b) further chain-extending the intermediate obtained in step (a) in the presence of base and an aprotic solvent with an aromatic dihydroxy compound which is different from hydroquinone.
- 7. A process as defined in claims 5 and 6 which is conducted in the presence of an alkali metal carbonate and/or bicarbonate or mixtures thereof.
- 8. A process as defined in claim 7 wherein the alkali metal carbonate is sodium carbonate or bicarbonate and potassium carbonate or cesium carbonate, or mixtures thereof.
- 9. A process as defined in claim 7 wherein the reaction is carried out in the presence of sodium carbonate and/or bicarbonate and potassium, rubidium or cesium fluorides or chlorides.
- 10. A process as defined in claims 5 or 6 wherein the aprotic solvent is an aliphatic or aromatic sulphoxide, sulphone, or mixtures thereof.
- 11. A process as defined in claims 5 or 6 which is carried out in one step.
Parent Case Info
This application is a continuation of prior U.S. application Ser. No. 757,932 filing date 7/23/85 abandoned.
US Referenced Citations (11)
Continuations (1)
|
Number |
Date |
Country |
Parent |
757932 |
Jul 1985 |
|