US4052365A
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Manufacture of crystallizable polymeric phenylene ether sulphone ketones
Assignee: Imperial Chemical Industries Ltd
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Filing: 1974-06-24
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Granted: 1977-10-04
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Expires: 1994-06-24
Abstract
Abstract Random or block copolymers having repeating units of the structures ##STR1## are crystallizable, in contrast to the regular alternating copolymer ##STR2## WHICH IS AMORPHOUS, AND THEY ARE USEFUL AS THERMOPLASTIC, FILM- AND FIBER-FORMING MATERIALS. They may be made by copolymerizing 4-phenoxyphenylsulphonyl and 4-phenoxybenzoyl chlorides in the presence of ferric chloride, or by copolymerizing alkali metal salts of 4-(4-chlorophenylsulphonyl) phenol and 4-(4-chlorobenzoyl) phenol.
Inventors
- 👤 Michael Edward Benet Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:06
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/20; H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/301
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
60 words
A crystallizable copolymer containing phenylene, ether, sulphone and ketone groups in the polymer chain, which is formed of repeating units having the structure --Ar--SO 2 -- and repeating units of the structure --Ar--CO--, where Ar is a divalent aromatic residue derived from a compound having the structure: ##STR9## by removing the hydrogen atoms which are para to the oxygen atoms.
Claim 2
Dependent Claim
60 words
A crystallizable copolymer containing phenylene, ether, sulphone and ketone groups in the polymer chain, which is formed of repeating units having the structure --Ar--SO 2 -- and repeating units of the structure --Ar--CO--, where Ar is a divalent aromatic residue derived from a compound having the structure: ##STR9## by removing the hydrogen atoms which are para to the oxygen atoms.
Claim 3
Dependent Claim
25 words
A crystallisable polymeric material according to claim 1 formed of repeating units having the structure I ##STR10## and repeating units having the structure II ##STR11##
Claim 4
Dependent Claim
17 words
A crystallisable copolymer according to claim 2 within the approximate composition range II/I = 35/65 to 50/50.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-03 | 1981-04-04 | 1981-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-03 | 1985-04-04 | 1985-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-03 | 1989-04-04 | 1989-10-04 | $7700.00 | Window Closed / Lapsed |