US4113699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of aromatic polymers
Assignee: Imperial Chemical Industries Ltd
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Filing: 1977-06-24
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Granted: 1978-09-12
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Expires: 1997-06-24
Abstract
Abstract Aromatic polyetherketones and/or sulphones are produced by heating a halophenol of formula <IMAGE> where X = halogen and is ortho or para to Q; Q = -CO- or -SO2-, Ar = an aromatic radical, with about 1/2 mole of a granular alkali metal carbonate per mole of halophenol in the presence of N-methyl pyrrolidone, dimethyl sulphone or an aromatic sulphone solvent at 200 DEG -400 DEG C.
Inventors
- 👤 John Brewster Rose
- 👤 Philip Anthony Staniland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:55
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/34; C08G65/38
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
146 words
A process for the manufacture of aromatic polyethersulphones and ketones and copolymers thereof comprising heating at 200 to 400° C at least one halophenol of the formula ##STR8## where X is halogen and is ortho or para to Q, Q is --CO-- or --SO 2 --, and Ar is a divalent aromatic radical, with about 0.5 moles of alkali metal carbonate, or about 1 mole of an alkali metal bicarbonate, per mole of halophenol, in the presence of a solvent selected from N-methyl pyrrolidone, dimethyl sulphone and an aromatic sulphone of formula ##STR9## where 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 or phenyl groups, said alkali metal carbonate or bicarbonate being in granular form of particle size less than 1000 μm.
Claim 2
Dependent Claim
146 words
A process for the manufacture of aromatic polyethersulphones and ketones and copolymers thereof comprising heating at 200 to 400° C at least one halophenol of the formula ##STR8## where X is halogen and is ortho or para to Q, Q is --CO-- or --SO 2 --, and Ar is a divalent aromatic radical, with about 0.5 moles of alkali metal carbonate, or about 1 mole of an alkali metal bicarbonate, per mole of halophenol, in the presence of a solvent selected from N-methyl pyrrolidone, dimethyl sulphone and an aromatic sulphone of formula ##STR9## where 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 or phenyl groups, said alkali metal carbonate or bicarbonate being in granular form of particle size less than 1000 μm.
Claim 3
Dependent Claim
24 words
A process according to claim 1 wherein the halogen atom X in the halophenol is selected from the group consisting of fluorine and chlorine.
Claim 4
Dependent Claim
45 words
A process according to claim 1 wherein the aromatic radical Ar in the halophenol is selected from radicals of formula ##STR10## where Q' is --CO-- or --SO 2 --, n and m are 1, 2 or 3 and p is 0, 1, 2 or 3.
Claim 5
Dependent Claim
36 words
A process according to claim 3 wherein the at least one halophenol is selected from the group consisting of 4-(4-chlorobenzoyl)phenol, 4-(4-chlorophenylsulphonyl) phenol, mixtures of 4-(4-chlorobenzoyl)phenol with 4-(4-chlorophenylsulphonyl)phenol or 4-(4-chlorobenzoyl)-4'-(4-hydroxybenzoyl)biphenyl, and mixtures of 4-(4-chlorophenylsulphonyl)phenol with 4-(4-chlorophenylsulphonyl) 4'-(4-hydroxyphenylsulphonyl)biphenyl.
Claim 6
Dependent Claim
38 words
A process according to claim 1 wherein 0.1 to 1.0 mole % of an aromatic dihalide having the halogen atoms activated by --SO 2 -- or --CO-- groups ortho or para thereto is included in the reaction mixture.
Claim 7
Dependent Claim
20 words
A process according to claim 5 wherein the aromatic dihalide is selected from the group consisting of 4,4'-dichlorodiphenylsulphone, and 4,4'-bis-(4-chlorophenylsulphonyl)biphenyl.
Claim 8
Dependent Claim
16 words
A process according to claim 1 wherein the alkali metal carbonate or bicarbonate is potassium carbonate.
Claim 9
Dependent Claim
34 words
A process according to claim 1 wherein the amount of alkali metal carbonate or bicarbonate is between 0.5 to 0.55 moles of carbonate, or 1 to 1.1 moles of bicarbonate, per mole of halophenol.
Claim 10
Dependent Claim
19 words
A process according to claim 1 wherein the halophenol is heated in the presence of diphenyl sulphone as solvent.
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) | 1981-09-11 | 1982-03-13 | 1982-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-11 | 1986-03-13 | 1986-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-11 | 1990-03-13 | 1990-09-12 | $7700.00 | Window Closed / Lapsed |