US4331798A
Expired / Lapsed
US
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Production of aromatic polyethers with infusible particulate substance
Assignee: Imperial Chemical Industries Ltd
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Filing: 1979-09-20
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Granted: 1982-05-25
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Expires: 1999-09-20
Abstract
Abstract Production of aromatic polyethers by reacting (i) a mixture of a bisphenol and a dihalobenzenoid compound or (ii) a halophenol, in which dihalobenzenoid compound or halophenol the halogen atoms are activated by ortho or para --SO 2 -- or --CO-- groups, with an alkali metal (bi)carbonate, wherein the reaction is carried out in the absence of a solvent and in the presence of an infusible particulate support substance, preferably inorganic or polymeric, yielding a reaction medium in the form of a free-flowing powder by the end of the reaction.
Inventors
- 👤 Philip A. Staniland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:50
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/34; C08G65/38; C08G65/40; C08G65/4012; C08G65/4093; C08G75/00; C08G75/20; C08G75/23
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
205 words
A process for the production of an aromatic polyether containing linkages selected from the group consisting of --SO 2 -- and --CO-- groups comprising heating in a reaction vessel, a reaction medium comprising (i) a substantially equimolar mixture of (a) at least one bisphenol and (b) at least one dihalobenzenoid compound, or (ii) at least one halophenol, in which dihalobenzenoid compound or halophenol the halogen atoms are activated by --SO 2 -- or --CO-- groups ortho or para thereto, with at least one alkali metal carbonate or bicarbonate to effect a polycondensation reaction to form the aromatic polyether, the amount of carbonate or bicarbonate being such that there is at least one alkali metal atom for each phenol group present, wherein the polycondensation reaction is carried out in the absence of a solvent and in the presence of a sufficient quantity of an infusible, under the conditions of reaction, particulate substance acting as a support for the polyether which is formed in the polycondensation reaction so as to yield by the end of the polycondensation reaction, a reaction medium in the form of a free-flowing powder which includes the aromatic polyether and the particulate substance and which may be discharged cleanly from the reaction vessel.
Claim 2
Dependent Claim
205 words
A process for the production of an aromatic polyether containing linkages selected from the group consisting of --SO 2 -- and --CO-- groups comprising heating in a reaction vessel, a reaction medium comprising (i) a substantially equimolar mixture of (a) at least one bisphenol and (b) at least one dihalobenzenoid compound, or (ii) at least one halophenol, in which dihalobenzenoid compound or halophenol the halogen atoms are activated by --SO 2 -- or --CO-- groups ortho or para thereto, with at least one alkali metal carbonate or bicarbonate to effect a polycondensation reaction to form the aromatic polyether, the amount of carbonate or bicarbonate being such that there is at least one alkali metal atom for each phenol group present, wherein the polycondensation reaction is carried out in the absence of a solvent and in the presence of a sufficient quantity of an infusible, under the conditions of reaction, particulate substance acting as a support for the polyether which is formed in the polycondensation reaction so as to yield by the end of the polycondensation reaction, a reaction medium in the form of a free-flowing powder which includes the aromatic polyether and the particulate substance and which may be discharged cleanly from the reaction vessel.
Claim 3
Dependent Claim
14 words
A process according to claim 1 wherein the infusible support substance used is inorganic.
Claim 4
Dependent Claim
129 words
A process according to claim 1 which comprises heating a substantially equimolar mixture of at least one bisphenol selected from the group consisting of hydroquinone and bisphenols having the formula ##STR12## in which l is 0 or 1 and Y is a divalent radical selected from the group consisting of oxygen, sulfur, --SO 2 --, --CO--, and divalent hydrocarbon radicals, and at least one dihalobenzenoid compound selected from dihalobenzenoid compounds having the formula ##STR13## in which X and X', which may be the same or different, are halogen atoms and are ortho or para to the groups Q and Q'; Q and Q', which may be the same or different, are --CO-- or --SO 2 --; Ar is a divalent aromatic radical; and n is 0, 1 or 3.
Claim 5
Dependent Claim
14 words
A process according to claim 1 wherein the infusible support substance used is water-soluble.
Claim 6
Dependent Claim
23 words
A process according to claim 1 wherein the infusible support substance used is water-insoluble and is retained with the aromatic polyether after work-up.
Claim 7
Dependent Claim
25 words
A process according to claim 2 wherein the infusible support substance used is an excess, over substantial stoichiometric, of the alkali metal carbonate or bicarbonate.
Claim 8
Dependent Claim
21 words
A process according to claim 1 wherein the reaction medium during the polycondensation reaction is agitated by at least a stirrer.
Claim 9
Dependent Claim
25 words
A process according to claim 1 wherein the reaction medium during the polycondensation reaction is agitated by at least the passage of a gas therethrough.
Claim 10
Dependent Claim
16 words
A process according to claim 1 wherein the initially charged materials exclude an inert liquid diluent.
Claim 11
Dependent Claim
16 words
A process according to claim 1 wherein the initially charged materials include an inert liquid diluent.
Claim 12
Dependent Claim
30 words
A process according to claim 3 wherein the at least one dihalobenzenoid compound used is selected from the dihalides having the formula ##STR14## where m is 1, 2 or 3.
Claim 13
Dependent Claim
51 words
A process according to claim 1 which comprises heating at least one halophenol selected from halophenols having the formula ##STR15## wherein X is halogen and is ortho or para to Q, Q is --SO 2 -- or --CO--, Ar is an aromatic radical, and --OH is para to the group Q.
Claim 14
Dependent Claim
54 words
A process according to claim 12 wherein Ar is a divalent aromatic radical selected from the group consisting of phenylene, biphenylene, and radicals of the formula ##STR16## where Q' is --CO-- or --SO 2 -- and n and m, which may be the same or different are integers selected from 1, 2 and 3.
Claim 15
Dependent Claim
24 words
A process according to claim 3 in which the halophenol is selected from halophenols having the formula ##STR17## where p is 0 or 1.
Claim 16
Dependent Claim
21 words
A process according to claim 1 wherein the polycondensation reaction is carried out within the temperature range 150° to 400° C.
Claim 17
Dependent Claim
22 words
A process according to claim 15 wherein the maximum temperature during the polycondensation is within the temperature range 270° to 370° C.
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) | 1985-05-24 | 1985-11-23 | 1986-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-24 | 1989-11-23 | 1990-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-24 | 1993-11-23 | 1994-05-25 | $7700.00 | Window Closed / Lapsed |