US4837296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of polyaryl ether ketones
Assignee: BASF SE
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Filing: 1988-01-11
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Granted: 1989-06-06
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Expires: 2008-01-11
Abstract
Abstract Polyaryl ether ketones are prepared by reacting aromatic dihydroxy compounds with aromatic dihalogen compounds in polar aprotic solvents in the presence of alkali metal carbonates, in particular by reacting aromatic dihydroxy compounds I <IMAGE> (I) <IMAGE> or ring-substituted C1-C8-alkyl, C1-C8-alkoxy, aryl, chlorine or fluorine derivatives thereof, n and m each being 0 or 1, with aromatic dihalogen compounds <IMAGE> (II) or ring-substituted C1-C8-alkyl, C1-C8-alkoxy, aryl, chlorine or fluorine derivatives thereof, r and s each being 0 or 1, A being oxygen or a chemical bond and X being chlorine or fluorine.
Inventors
- 👤 Gerhard Heinz
- 👤 Juergen Koch
- 👤 Manfred Eggersdorfer
- 👤 Jochem Henkelmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:13
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/34; C08G65/38; C08G65/40; C08G65/4087; C08G65/4012
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
121 words
A process for preparing a polyaryl ether ketone by reacting an aromatic dihydroxy compound with an aromatic dihalogen compound in a polar aprotic solvent in the presence of an alkali metal carbonate, which comprises reacting an aromatic dihydroxy compound of the formula I ##STR13## or a ring-substituted C 1 -C 8 -alkyl, C 1 -C 8 -alkoxy, aryl, chlorine or fluorine derivative thereof, n and m each being 0 or 1, with an aromatic dihalogen compound of the formula II ##STR14## or a ring-substituted C 1 -C 8 -alkyl, C 1 -C 8 -alkoxy, aryl, chlorine or fluorine derivative thereof, r and s each being 0 or 1, A being oxygen or a chemical bond and X being chlorine or fluorine.
Claim 2
Dependent Claim
121 words
A process for preparing a polyaryl ether ketone by reacting an aromatic dihydroxy compound with an aromatic dihalogen compound in a polar aprotic solvent in the presence of an alkali metal carbonate, which comprises reacting an aromatic dihydroxy compound of the formula I ##STR13## or a ring-substituted C 1 -C 8 -alkyl, C 1 -C 8 -alkoxy, aryl, chlorine or fluorine derivative thereof, n and m each being 0 or 1, with an aromatic dihalogen compound of the formula II ##STR14## or a ring-substituted C 1 -C 8 -alkyl, C 1 -C 8 -alkoxy, aryl, chlorine or fluorine derivative thereof, r and s each being 0 or 1, A being oxygen or a chemical bond and X being chlorine or fluorine.
Claim 3
Dependent Claim
16 words
A process as claimed in claim 1, wherein the polar aprotic solvent used is diphenyl sulfone.
Claim 4
Dependent Claim
16 words
A process as claimed in claim 1, wherein the alkali metal carbonate used is potassium carbonate.
Claim 5
Dependent Claim
16 words
A process as claimed in claim 2, wherein the alkali metal carbonate used is potassium carbonate.
References Cited (Backward Citations)
US4176222A
Cited
US4320224A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-05 | 1992-12-05 | 1993-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-05 | 1996-12-05 | 1997-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-05 | 2000-12-05 | 2001-06-06 | $7700.00 | Window Closed / Lapsed |