US4036815A
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Aromatic polymers prepared from halophenols containing keto groups
Assignee: Imperial Chemical Industries Ltd
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Filing: 1975-07-09
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Granted: 1977-07-19
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Expires: 1995-07-09
Abstract
Abstract New aromatic polymers comprising units of the formula <IMAGE> and copolymers comprising such units or other units such as <IMAGE> <IMAGE> The new polymer may be made from the alkali metal salt of a halophenol of the formula <IMAGE>
Inventors
- 👤 Ronald George Feasey
- 👤 John Brewster Rose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:22
CPC Classifications
C; C08; C08G; C08G61/00; C08G61/12; C08G61/127; C08G65/00; C08G65/34; C08G65/38; C08G75/00; C08G75/20
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
84 words
An aromatic polymer whose molecular chains consist essentially of units of the formula ##STR20## alone or copolymerised with other units obtained by elimination of alkali metal halide from a member of the group consisting of alkali metal salts of other activated halophenols and mixtures of alkali metal salts of dihydric phenols with activated dihalobenzenoid compounds in which the halogen atoms in the halophenol or dihalobenzenoid compounds are activated by electron-attracting group selected from --CO-- and --SO 2 ortho or para to the halogen atom.
Claim 2
Dependent Claim
84 words
An aromatic polymer whose molecular chains consist essentially of units of the formula ##STR20## alone or copolymerised with other units obtained by elimination of alkali metal halide from a member of the group consisting of alkali metal salts of other activated halophenols and mixtures of alkali metal salts of dihydric phenols with activated dihalobenzenoid compounds in which the halogen atoms in the halophenol or dihalobenzenoid compounds are activated by electron-attracting group selected from --CO-- and --SO 2 ortho or para to the halogen atom.
Claim 3
Dependent Claim
25 words
An aromatic polymer consisting essentially of units selected from at least one of the formulae ##STR21## at least some of said units being ##STR22## units.
Claim 4
Dependent Claim
25 words
An aromatic polymer consisting essentially of units selected from at least one of the formulae ##STR21## at least some of said units being ##STR22## units.
Claim 5
Dependent Claim
25 words
An aromatic polymer according to claim 2 whose molecular chains consisting essentially of units of the formula ##STR23## copolymerised with units of the formula ##STR24##
Claim 6
Dependent Claim
25 words
An aromatic polymer according to claim 2 whose molecular chains consisting essentially of units of the formula ##STR25## copolymerised with units of the formula ##STR26##
Claim 7
Dependent Claim
25 words
An aromatic polymer according to claim 2 whose molecular chains consisting essentially of units of the formula ##STR27## copolymerised with units of the formula ##STR28##
Claim 8
Dependent Claim
15 words
An aromatic polymer according to claim 2 consisting essentially of units of the formula ##STR29##
Claim 9
Dependent Claim
65 words
An aromatic copolymer consisting essentially of units of the formula ##STR30## together with untis selected from at least one of units (A) and units (B), said units A being selected from at least one of the formulae ##STR31## and said units (B) being selected from at least one of the formulae ##STR32## said units B comprising 0 to 80% of the number of units A.
Claim 10
Dependent Claim
65 words
An aromatic copolymer consisting essentially of units of the formula ##STR30## together with untis selected from at least one of units (A) and units (B), said units A being selected from at least one of the formulae ##STR31## and said units (B) being selected from at least one of the formulae ##STR32## said units B comprising 0 to 80% of the number of units A.
Claim 11
Dependent Claim
44 words
An aromatic copolymer consisting essentially of units of the formula ##STR33## and units consisting essentially of a chain containing benzenoid groups, oxygen or sulphur atoms and bivalent electron attracting groups separated from an oxygen or sulphur atom by a para or ortho phenylene group.
Claim 12
Dependent Claim
44 words
An aromatic copolymer consisting essentially of units of the formula ##STR33## and units consisting essentially of a chain containing benzenoid groups, oxygen or sulphur atoms and bivalent electron attracting groups separated from an oxygen or sulphur atom by a para or ortho phenylene group.
Claim 13
Dependent Claim
23 words
An aromatic copolymer according to claim 8 in which the bivalent electron attracting groups are selected from --SO 2 -- and --CO-- groups.
References Cited (Backward Citations)
GB1177183A
Cited
US3549595A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-18 | 1981-01-17 | 1981-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-18 | 1985-01-17 | 1985-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-18 | 1989-01-17 | 1989-07-19 | $7700.00 | Window Closed / Lapsed |