Production of arylene sulfide polymers

Details Production of arylene sulfide polymers Production of arylene sulfide polymers

1975-05-27

1977-07-26

Marquis, Melvyn I.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 457R, 260 79, C08G 7516

Patent

active

040382621

ABSTRACT:
A method by which arylene sulfide polymers are produced by admixing p-dihalobenzene, optionally together with a polyhalo aromatic compound having more than two halogen substituents per molecule, an alkali metal sulfide, an alkali metal carboxylate or a lithium halide, an alkali metal hydroxide, and N-methyl-2-pyrrolidone at polymerization conditions with the addition of carbon dioxide either during the polymerization or upon completion of the polymerization but prior to removal of N-methyl-2-pyrrolidone by distillation at elevated temperatures thereby producing a polymer, after washing, of lower melt flow than is obtained without the addition of carbon dioxide. In an embodiment of the invention the use of carbon dioxide makes unnecessary the use of vacuum distillation in recovering N-methyl-2-pyrrolidone from the reaction effluent and also makes possible improved recovery of N-methyl-2-pyrrolidone.

REFERENCES:
patent: 3354129 (1967-11-01), Edmonds, Jr. et al.
patent: 3763124 (1973-10-01), Edmonds, Jr.
patent: 3786035 (1974-01-01), Scoggin
patent: 3919177 (1975-11-01), Campbell

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