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US 5,352,768 AGranted
Acid treatment of poly(arylene sulfide) polymer reaction mixture
AssigneePhillips Petroleum Company
InventorsJohn D. Stuber, Wei-Teh W. Shang, Lacey E. Scoggins
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Abstract
A method is provided for producing a poly(arylene sulfide) polymer having reduced amounts of impurities by contacting a poly(arylene sulfide) polymerization reaction mixture with an acid.
Claims10
A process for producing a poly(arylene sulfide) polymer which comprises
- contacting reactants comprising at least one sulfur source, at least one dihaloaromatic compound and a polar organic compound to form a polymerization reaction mixture,
- subjecting said polymerization reaction mixture to suitable polymerization conditions to form said poly(arylene sulfide) polymer,
- contacting said reaction mixture with an acidic solution while maintaining said suitable polymerization conditions, and thereafter
- recovering said poly(arylene sulfide) polymer.
1 more element
A process for preparing a poly(phenylene sulfide) polymer which comprises
- contacting reactants comprising dichlorobenzene, sodium sulfide, sodium hydroxide, N-methyl-2-pyrrolidone to form a polymerization reaction mixture,
- subjecting said polymerization reaction mixture to polymerization conditions of temperature in the range of about 235.degree. C. to about 450.degree. C. and time in the range of about 1 hour to 8 hours,
- contacting said reaction mixture with an acidic solution while maintaining said polymerization conditions, and thereafter
- recovering said poly(phenylene sulfide) polymer.
1 more element
Dependencies are inferred from the claim text.