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US 4,855,393 AGranted
Process for the preparation of copoly(arylene sulfide)
AssigneeEastman Kodak Company
InventorsMark Rule, David R. Fagerburg, Joseph J. Watkins, Jerry S. Fauver
Life of this patent
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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.
Claims12
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.degree. 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.
1 more element
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.degree. to 350.degree. C., to produce the elemental iodine and the copoly(phenylene sulfide), and
- (2) recovering the elemental iodide.
1 more element
Dependencies are inferred from the claim text.