Patent US4232142A successfully refreshed from Google Patents.
US4232142A
Expired / Lapsed
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Production of polyarylene ether sulphones and ketones
Assignee: Imperial Chemical Industries Ltd
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Filing: 1975-11-18
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Granted: 1980-11-04
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Expires: 1995-11-18
Abstract
Abstract Aromatic polymers containing benzenoid groups and oxygen atoms in the polymer chains are made by the action of an alkali metal hydroxide on a dihalogenobenzenoid compound in which each halogen atom is activated by an inert electron-attracting group such as -SO2-. When a bis-(4-halogenophenyl) sulphone is reacted with an alkali metal hydroxide, the alkali metal salt of a 4-(4-halogenophenylsulphonyl)phenol is formed as a readily isolated intermediate which polymerizes in the presence or absence of solvent to give a polymer having repeating units of the structure <IMAGE>
Inventors
- 👤 Dennis A. Barr
- 👤 John B. Rose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:07
CPC Classifications
C; C07; C07C; C07C317/00; C07C45/00; C07C45/61; C07C45/64; C07C49/00; C07C49/76; C07C49/82; C07C49/83; C08; C08G; C08G61/00; C08G65/00; C08G65/34; C08G65/38; C08G75/00; C08G75/02; C08G75/0204; C08G75/0236; C08G75/20
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
82 words
A process for preparing an aromatic polymer which comprises heating a condensed oligomer obtained by reaction in a solvent of a dihalo benzenoid compound of the formula ##STR14## wherein Z represents --SO 2 or --CO--; X and X' are halogen atoms which are ortho or para to Z with a substantially equivalent amount of an alkali metal hydroxide followed by removal of solvent; said condensed oligomer being heated at 200°-400° C. under a nonreactive atmosphere in the substantial absence of a solvent.
Claim 2
Dependent Claim
82 words
A process for preparing an aromatic polymer which comprises heating a condensed oligomer obtained by reaction in a solvent of a dihalo benzenoid compound of the formula ##STR14## wherein Z represents --SO 2 or --CO--; X and X' are halogen atoms which are ortho or para to Z with a substantially equivalent amount of an alkali metal hydroxide followed by removal of solvent; said condensed oligomer being heated at 200°-400° C. under a nonreactive atmosphere in the substantial absence of a solvent.
Claim 3
Dependent Claim
106 words
A process for preparing an aromatic polymer which comprises heating a condensed oligomer having a reduced viscosity of 0.06 to 0.2 as measured in a 1% solution of said oligomer in dimethyl formamide at 25° C. obtained by reaction in a solvent of a dihalo benzenoid compound of the formula ##STR15## wherein Z represents --SO 2 -- or --CO--; X and X' are halogen atoms which are ortho or para to Z, with a substantially equivalent amount of an alkali metal hydroxide followed by removal of solvent; said condensed oligomer being heated at 200°-400° C. under a nonreactive atmosphere in the substantial absence of a solvent.
Claim 4
Dependent Claim
106 words
A process for preparing an aromatic polymer which comprises heating a condensed oligomer having a reduced viscosity of 0.06 to 0.2 as measured in a 1% solution of said oligomer in dimethyl formamide at 25° C. obtained by reaction in a solvent of a dihalo benzenoid compound of the formula ##STR15## wherein Z represents --SO 2 -- or --CO--; X and X' are halogen atoms which are ortho or para to Z, with a substantially equivalent amount of an alkali metal hydroxide followed by removal of solvent; said condensed oligomer being heated at 200°-400° C. under a nonreactive atmosphere in the substantial absence of a solvent.
Claim 5
Dependent Claim
24 words
The process of claim 1 wherein the condensed oligomer is heated at 200°-400° C. in a vacuum in the substantial absence of a solvent.
Claim 6
Dependent Claim
26 words
The process of claim 1 wherein the condensed oligomer is heated at 200°-400° C. in an inert gas atmosphere in the substantial absence of a solvent.
Claim 7
Dependent Claim
13 words
The process of claim 1, wherein the dihalobenzenoid compound has the formula ##STR16##
Claim 8
Dependent Claim
51 words
A process for preparing an aromatic polymer which comprises heating a condensed oligomer having units having the formula ##STR17## wherein Z represents --SO 2 -- or --CO-- and the ether bond is ortho or para to Z; at 200°-400° C. under a nonreactive atmosphere in the substantial absence of a solvent.
Claim 9
Dependent Claim
51 words
A process for preparing an aromatic polymer which comprises heating a condensed oligomer having units having the formula ##STR17## wherein Z represents --SO 2 -- or --CO-- and the ether bond is ortho or para to Z; at 200°-400° C. under a nonreactive atmosphere in the substantial absence of a solvent.
Claim 10
Dependent Claim
74 words
A process for preparing an aromatic polymer which comprises heating a condensed oligomer having a reduced viscosity of 0.06 to 0.2 as measured in a 1% solution of said oligomer in dimethyl formamide at 25° C. having units having the formula ##STR18## wherein Z represents --SO 2 -- or --CO--; and the ether bond is ortho or para to Z; at 200°-400° C. under a nonreactive atmosphere in the substantial absence of a solvent.
Claim 11
Dependent Claim
74 words
A process for preparing an aromatic polymer which comprises heating a condensed oligomer having a reduced viscosity of 0.06 to 0.2 as measured in a 1% solution of said oligomer in dimethyl formamide at 25° C. having units having the formula ##STR18## wherein Z represents --SO 2 -- or --CO--; and the ether bond is ortho or para to Z; at 200°-400° C. under a nonreactive atmosphere in the substantial absence of a solvent.
Claim 12
Dependent Claim
24 words
The process of claim 6 wherein the condensed oligomer is heated at 200°-400° C. in a vacuum in the substantial absence of a solvent.
Claim 13
Dependent Claim
26 words
The process of claim 6 wherein the condensed oligomer is heated at 200°-400° C. in an inert gas atmosphere in the substantial absence of a solvent.
Claim 14
Dependent Claim
15 words
The process of claim 6, wherein the condensed oligomer has units having the formula ##STR19##
Claim 15
Dependent Claim
15 words
The process of claim 6 wherein the condensed oligomer has units having the formula ##STR20##
References Cited (Backward Citations)
US3886121A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-11-04 | 1984-05-05 | 1984-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-04 | 1988-05-05 | 1988-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-04 | 1992-05-05 | 1992-11-04 | $7700.00 | Window Closed / Lapsed |