Abstract: Poly(arylene sulfide) oligomers are recovered in a process comprising steps of:(a) dehydration of an aqueous admixture of alkali metal hydroxide such as sodium hydroxide, and alkali metal bisulfide such as sodium bisulfide, in a polar organic solvent such as N-methyl-2-pyrrolidone (NMP), wherein the molar ratio of alkali metal hydroxide to alkali metal bisulfide is about 0.90:1 to about 1.05:1 prior to dehydration and 0.99:1 to about 1.
Type:
Grant
Filed:
January 23, 1987
Date of Patent:
March 8, 1988
Assignee:
Phillips Petroleum Company
Inventors:
Afif M. Nesheiwat, Guy Senatore, Fred T. Sherk
Abstract: Compositions comprising a poly(arylene sulfide) which crystallizes to a fine-grained crystalline morphology are provided. A method is also provided for treating compositions comprising a poly(arylene sulfide) by incorporation of a crystalline morphology altering additive, heating the resulting mixture above the melting point of the poly(arylene sulfide) and cooling the mixture at a rate of less than 50.degree. C. per minute. Exemplary additives include a poly(arylene sulfide-ketone) and a polyaryl ketone.
Type:
Grant
Filed:
April 4, 1986
Date of Patent:
September 1, 1987
Assignee:
Phillips Petroleum Company
Inventors:
Timothy W. Johnson, William H. Beever, James E. O'Connor, Jennings P. Blackwell
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