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Patent US4476296A successfully refreshed from Google Patents.
US4476296A
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Preparation of aromatic polymers from cyclohexa-3,5-diene polymers
Assignee: Imperial Chemical Industries Ltd
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Filing: 1982-10-06
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Granted: 1984-10-09
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Expires: 2002-10-06
Abstract
Abstract A process for the preparation of polymeric compositions which comprise novel polymers and copolymers of certain 1,2-disubstituted-cyclohexadienes, aromatization of such polymers in the form of inter alia fibers, and novel aromatic polymers.
Inventors
- 👤 Denis G. H. Ballard
- 👤 Andrew Courtis
- 👤 Ian M. Shirley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:47
CPC Classifications
C; C07; C07C; C07C255/00; C07C35/00; C07C35/02; C07C35/08; C07C35/14; C07C35/48; C07C35/50; C08; C08F; C08F32/00; C08F32/02; C08F32/06; C08F8/00; C08L; C08L45/00; C12; C12N; C12N1/00; C12N1/20; C12N1/205; C12P; C12P7/00; C12P7/02; C12R; C12R2001/00; C12R2001/01; C12R2001/38; C12R2001/40; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/874; Y10S435/877
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
54 words
A process for the preparation of a polymer which has aromatic rings in the backbone thereof which process comprises subjecting a polymer which has 1,2-disubstituted-cyclohexenylene rings in the polymer backbone to a suitable heat treatment in a substantially oxygen-free atmosphere such that the 1,2-substituents are eliminated from at least substantially all the cyclohexenylene rings.
Claim 2
Dependent Claim
54 words
A process for the preparation of a polymer which has aromatic rings in the backbone thereof which process comprises subjecting a polymer which has 1,2-disubstituted-cyclohexenylene rings in the polymer backbone to a suitable heat treatment in a substantially oxygen-free atmosphere such that the 1,2-substituents are eliminated from at least substantially all the cyclohexenylene rings.
Claim 3
Dependent Claim
96 words
A process as claimed in claim 1 wherein the polymer which has 1,2-disubstituted-cyclohexenylene rings in the polymer backbone has a structure which is represented by the general formula: ##STR17## wherein the cyclohexenylene rings and the residue X, where X is present which optionally varies from unit to unit along the polymer chain; X, where present, is the residue of a polymerisable comonomer, n and m are whole numbers; and the ratio of n:m lies in the range 1:0 to 1:1000; and each R 1 , which may be the same or different, is acyl or hydrocarbyloxyketo.
Claim 4
Dependent Claim
16 words
A process as claimed in claim 2 wherein the polymer is subjected to a heat treatment.
Claim 5
Dependent Claim
53 words
A process as claimed in claim 2 wherein R 1 is aroyl, an alkanoyl group having up to eight carbon atoms and lacking a hydrogen atom on the carbon atom adjacent the carboxy group, or R 3 OCO where R 3 is aroyl or an alkyl group having up to ten carbon atoms.
Claim 6
Dependent Claim
13 words
A process as claimed in claim 1 whenever carried out on a fibre.
Claim 7
Dependent Claim
11 words
A process as claimed in claim 2 wherein m is zero.
Claim 8
Dependent Claim
13 words
A process as claimed in claim 1 wherever carried out on a film.
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) | 1987-10-09 | 1988-04-09 | 1988-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-09 | 1992-04-09 | 1992-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-09 | 1996-04-09 | 1996-10-09 | $7700.00 | Window Closed / Lapsed |