US4169178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of aromatic polyethers
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1978-03-03
•
Granted: 1979-09-25
•
Expires: 1998-03-03
Abstract
Abstract Aromatic polyethers are made by reacting i) an equimolar mixture of a bisphenol of formula ##STR1## in which Y is a direct link, --O--, --S--, --SO 2 --, --CO-- or a divalent hydrocarbon radical, and an aromatic dihalo compound or ii) a halophenol, in which dihalo compound or halophenol the halogen atoms are activated by ortho or para --SO 2 -- or --CO-- groups, with an alkali metal carbonate or bicarbonate. At least some of the halophenol and/or dihalo compound is fluorine containing. The amount of carbonate or bicarbonate is such that there is between 1 and 1-x/2 atoms of alkali metal per phenol group, where x is the fraction of activated halogen atoms that are fluorine.
Inventors
- 👤 John L. Freeman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:15
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: 10
Claim 1
Independent Claim
152 words
A process for the production of an aromatic polyether comprising polycondensing, by heating to a temperature in the range 100° to 400° C. (i) a substantially equimolar mixture of (a) at least one bisphenol of formula ##STR16## in which Y is a direct link, oxygen, sulphur, --SO 2 --, --CO-- or a divalent hydrocarbon radical, and (b) at least one dihalobenzenoid compound, and/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, the halogen of at least some of the halophenol and/or dihalobenzenoid compound being fluorine, with (iii) an alkali metal carbonate or bicarbonate, the amount of alkali metal carbonate or bicarbonate being such that there is at least (1-x/2), and less than one, atom of alkali metal per phenol group, where x is the fraction of the activated halogen atoms that are fluorine.
Claim 2
Dependent Claim
152 words
A process for the production of an aromatic polyether comprising polycondensing, by heating to a temperature in the range 100° to 400° C. (i) a substantially equimolar mixture of (a) at least one bisphenol of formula ##STR16## in which Y is a direct link, oxygen, sulphur, --SO 2 --, --CO-- or a divalent hydrocarbon radical, and (b) at least one dihalobenzenoid compound, and/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, the halogen of at least some of the halophenol and/or dihalobenzenoid compound being fluorine, with (iii) an alkali metal carbonate or bicarbonate, the amount of alkali metal carbonate or bicarbonate being such that there is at least (1-x/2), and less than one, atom of alkali metal per phenol group, where x is the fraction of the activated halogen atoms that are fluorine.
Claim 3
Dependent Claim
12 words
A process according to claim 1 wherein x is at least 0.1.
Claim 4
Dependent Claim
12 words
A process according to claim 2 wherein x is at least 0.5.
Claim 5
Dependent Claim
32 words
A process according to claim 1 wherein the amount of alkali metal carbonate or bicarbonate is such that there is between (1-x/2) and 1.2 (1-x/2) atoms of alkali metal per phenol group.
Claim 6
Dependent Claim
86 words
A process according to claim 1 in which at least one dihalobenzenoid compound is employed, the at least one dihalobenzenoid compound being selected from dihalobenzenoid compounds of the formula ##STR17## 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, 2 or 3.
Claim 7
Dependent Claim
38 words
A process according to claim 5 in which the at least one dihalobenzenoid compound is selected from the group consisting of 4,4'-bis-(4-halophenylsulphonyl)diphenyl ethers, 4,4'-bis-(4-halobenzoyl)diphenyl ethers, and dihalides having the formula ##STR18## where m is 1, 2 or 3.
Claim 8
Dependent Claim
50 words
A process according to claim 1 wherein at least one halophenol is employed, said at least one halophenol being selected from halophenols having the formula ##STR19## wherein X is halogen and is ortho or para to Q, Q is --SO 2 -- or --CO--, and Ar is an aromatic radical.
Claim 9
Dependent Claim
54 words
A process according to claim 7 wherein Ar is a divalent aromatic radical selected from the group consisting of phenylene, biphenylene, and radicals of the formula ##STR20## 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 10
Dependent Claim
24 words
A process according to claim 8 in which the halophenol is selected from halophenols having the formula ##STR21## where p is 0 or 1.
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) | 1982-09-24 | 1983-03-26 | 1983-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-09-24 | 1987-03-26 | 1987-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-09-24 | 1991-03-26 | 1991-09-25 | $7700.00 | Window Closed / Lapsed |