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US4855393A
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Process for the preparation of copoly(arylene sulfide)
Assignee: Eastman Chemical Co
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Filing: 1989-02-13
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Granted: 1989-08-08
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Expires: 2009-02-13
Abstract
Abstract A process for preparing a copoly(arylene sulfide) corresponding to the structure [(--A--S--).sub.1-x (--A--S--S--).sub.x ].sub.n wherein x is in the range of 0.5 to 0.001 by reacting a mixture of a diiodoaromatic compound and elemental sulfur in the absence of a basic material.
Inventors
- 👤 Mark Rule
- 👤 David R. Fagerburg
- 👤 Joseph J. Watkins
- 👤 Jerry S. Fauver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:51
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/02; C08G75/0204; C08G75/025; C08G75/0263; C08G75/0227; C08G75/0236
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
83 words
A process for producing elemental iodine and a copoly(arylene sulfide) corresponding to the structure: [(--A--S--).sub.1-x (--A--S--S--).sub.x ].sub.n wherein A is a divalent substituted or unsubstituted aromatic radical, x is in the range of 0.5 to 0.001 and n is at least 200, comprising (1) reacting at a temperature above about 175° C. a mixture of a diiodoaromatic compound and elemental sulfur in the absence of a basic material to produce the elemental iodine and the copoly(arylene sulfide), and (2) recovering the elemental iodine.
Claim 2
Dependent Claim
83 words
A process for producing elemental iodine and a copoly(arylene sulfide) corresponding to the structure: [(--A--S--).sub.1-x (--A--S--S--).sub.x ].sub.n wherein A is a divalent substituted or unsubstituted aromatic radical, x is in the range of 0.5 to 0.001 and n is at least 200, comprising (1) reacting at a temperature above about 175° C. a mixture of a diiodoaromatic compound and elemental sulfur in the absence of a basic material to produce the elemental iodine and the copoly(arylene sulfide), and (2) recovering the elemental iodine.
Claim 3
Dependent Claim
25 words
The process of claim 1 wherein said diiodoaromatic compound is selected from the group consisting of hydrocarbon diiodoaromatics, sulfur-containing diiodoaromatics, nitrogen-containing diiodoaromatics and oxygen-containing diiodoaromatics.
Claim 4
Dependent Claim
21 words
The process of claim 2 wherein said diiodoaromatic compound is substituted with one or more alkyl groups having 1-6 carbon atoms.
Claim 5
Dependent Claim
37 words
The process of claim 1 wherein the diiodoaromatic compound is substituted with a member selected from the group consisting of phenyl, halogen, hydroxy, nitro, amino, C 1-6 alkoxy, carboxylate, carboxylic acid, aryl sulfone and aryl ketone groups.
Claim 6
Dependent Claim
21 words
The process of claim 1 wherein said diiodoaromatic compound is selected from the group consisting of diiodobenzenes, diiodonapthalenes, diiodobiphenyls and diiodotoluenes.
Claim 7
Dependent Claim
17 words
The process of claim 1 wherein said diiodoaromatic compound is p-diiodobenzene, m-diiodobenzene, p,p'-diiodobiphenyl, p,p'-diiododiphenyl ether, and 2,6-diiodonaphthalene.
Claim 8
Dependent Claim
18 words
The process of claim 1 wherein said reacting step is conducted at a temperature between about 175°-400° C.
Claim 9
Dependent Claim
18 words
The process of claim 7 wherein said reacting step is conducted at a temperature between about 180°-350° C.
Claim 10
Dependent Claim
18 words
The process of claim 1 wherein said reacting step is conducted in the presence of an inert solvent.
Claim 11
Dependent Claim
14 words
The process of claim 1 wherein said reacting step is a solid state polymerization.
Claim 12
Dependent Claim
26 words
The process of claim 1 wherein said reacting step is conducted as a continuous process and wherein an inert gas is passed through said reaction mixture.
Claim 13
Dependent Claim
83 words
A process for producing elemental iodine and a copoly(phenylene sulfide) corresponding to the structure [(--A--S--).sub.1-x (--A--S--S--).sub.x ].sub.n where A is a divalent unsubstituted phenylene radical, x is in the range of 0.5 to 0.001, and n is at least 400, comprising (1) reacting in the absence of a basic material a mixture of diiodobenzene and elemental sulfur at a temperature in the range of 180° to 350° C., to produce the elemental iodine and the copoly(phenylene sulfide), and (2) recovering the elemental iodide.
Claim 14
Dependent Claim
83 words
A process for producing elemental iodine and a copoly(phenylene sulfide) corresponding to the structure [(--A--S--).sub.1-x (--A--S--S--).sub.x ].sub.n where A is a divalent unsubstituted phenylene radical, x is in the range of 0.5 to 0.001, and n is at least 400, comprising (1) reacting in the absence of a basic material a mixture of diiodobenzene and elemental sulfur at a temperature in the range of 180° to 350° C., to produce the elemental iodine and the copoly(phenylene sulfide), and (2) recovering the elemental iodide.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-08-07 | 1993-02-06 | 1993-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-07 | 1997-02-06 | 1997-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-07 | 2001-02-06 | 2001-08-08 | $7700.00 | Window Closed / Lapsed |