US4717761A
Expired / Lapsed
US
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Thermoplastic aromatic polyetherketones
Assignee: Victrex Manufacturing Ltd
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Filing: 1985-12-05
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Granted: 1988-01-05
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Expires: 2005-12-05
Abstract
Abstract Aromatic polyetherketones containing the repeat units: -O-Ph-O-Ph-CO-Ph-I and -O-Ph-Ph-O-Ph-CO-Ph-II in the relative molar proportions I:II of 95:5 to 60:40, preferably 90:10 to 60:40. The polymer typically has a melt viscosity of at least 0.06 kN.s.m.-2 preferably at least 0.1 kN.s.m.-2. Preferred polymers are tough. The polymers may be made by condensation of hydroquinone, 4,4'-dihydroxydiphenyl and 4,4,'-difluorobenzophenone in the presence of an alkali metal carbonate or bicarbonate and of an aromatic sulphone solvent, e.g., diphenylsulphone. Polycondensation is effected at 150 DEG -400 DEG C. The polymers are very useful for wire coating.
Inventors
- 👤 Philip A. Staniland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:39
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/34; C08G65/38; C08G65/40; C08G65/4012; C08G65/4093
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
40 words
A polymeric material having the repeating units I and II --O--Ph--O--Ph--CO--Ph-- I and --O--Ph--Ph--O--Ph--CO--Ph-- II wherein the repeating units I and II are in the relative molar proportions I:II of from 95:5 to 60:40, and Ph is a phenylene group.
Claim 2
Dependent Claim
40 words
A polymeric material having the repeating units I and II --O--Ph--O--Ph--CO--Ph-- I and --O--Ph--Ph--O--Ph--CO--Ph-- II wherein the repeating units I and II are in the relative molar proportions I:II of from 95:5 to 60:40, and Ph is a phenylene group.
Claim 3
Dependent Claim
14 words
The polymeric material of claim 1 wherein each Ph group is a para-phenylene group.
Claim 4
Dependent Claim
24 words
The polymeric material of claim 2 which has a melt viscosity, measured at a temperature of 400° C., of at least kN.s.m -2 .
Claim 5
Dependent Claim
31 words
The polymeric material of claim 3 which is a tough, crystalline material and which contains the repeating units I and II in the molar proportions I:II of from 90:10 to 70:30.
Claim 6
Dependent Claim
51 words
A process for the production of a polyetherketone which process comprises polycondensing a mixture of at least one dihydroxybenzene compound and at least one dihydroxybiphenyl compound in the molar proportions of 95:5 to 60:40 with at least one dihalobenzophenone in the presence of at least one alkali metal carbonate or bicarbonate.
Claim 7
Dependent Claim
51 words
A process for the production of a polyetherketone which process comprises polycondensing a mixture of at least one dihydroxybenzene compound and at least one dihydroxybiphenyl compound in the molar proportions of 95:5 to 60:40 with at least one dihalobenzophenone in the presence of at least one alkali metal carbonate or bicarbonate.
Claim 8
Dependent Claim
15 words
The process of claim 5 wherein a mixture of hydroquinone; 4,4-dihydroxybiphenyl and 4,4'-difluorobenzophenone is polycondensed.
Claim 9
Dependent Claim
83 words
The process of claim 6 which is effected in the presence of a solvent having the formula ##STR3## at a temperature within the range 150° to 400° C., the final temperature during the polycondensation being sufficiently high to maintain the final polymer in solution, wherein Y is a direct link, an oxygen atom or two hydrogen atoms (one attached to each benzene ring); and Z, and Z' which may be the same or different, are hydrogen atoms, alkyl, alkaryl, aralkyl or aryl groups.
Claim 10
Dependent Claim
24 words
The process of claim 5 wherein the proportions of the bisphenol components are substantially equimolar with the proportions of the at least one dihalobenzophenone.
Claim 11
Dependent Claim
21 words
The process of claim 5 wherein the sole use of one, or both, of sodium carbonate and sodium bicarbonate is excluded.
Claim 12
Dependent Claim
76 words
A fabricated structure which is a wire or cable having an insulating coating formed from a tough crystalline thermoplastic polyetherketone containing the repeating units I and II --O--Ph--O--Ph--CO--Ph-- I --O--Ph--Ph--O--Ph--CO--Ph-- II wherein the repeating units I and II are in the relative molar proportions I:II of from 95:5 to 60:40, said polymer having a melt viscosity, measured at a temperature of 400° C., of at least 0.06 kN.s.m. -2 , wherein Ph is a phenylene group.
Claim 13
Dependent Claim
76 words
A fabricated structure which is a wire or cable having an insulating coating formed from a tough crystalline thermoplastic polyetherketone containing the repeating units I and II --O--Ph--O--Ph--CO--Ph-- I --O--Ph--Ph--O--Ph--CO--Ph-- II wherein the repeating units I and II are in the relative molar proportions I:II of from 95:5 to 60:40, said polymer having a melt viscosity, measured at a temperature of 400° C., of at least 0.06 kN.s.m. -2 , wherein Ph is a phenylene group.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-01-04 | 1991-07-06 | 1992-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-04 | 1995-07-06 | 1996-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-04 | 1999-07-06 | 2000-01-05 | $7700.00 | Window Closed / Lapsed |