Aromatic polymer production

Details Aromatic polymer production Aromatic polymer production

1977-02-10

1978-09-12

Lee, Lester L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Treating polymer containing material or treating a solid...

528499, 528125, 528128, 528218, 528219, 528174, 528175, C08G 6540, C08G 7520

Patent

active

041136985

ABSTRACT:
Process for the separation of a polyetherketone from the reaction product resulting from the nucleophilic polycondensation of (i) at least one alkali metal bisphenate with at least one dihalo compound, and/or (ii) at least one alkali metal halophenate, in an aromatic sulphone solvent of formula ##STR1## in which Y is a direct link, oxygen, or a pair of hydrogen atoms, and Z and Z' are hydrogen atoms or phenyl groups, comprising finely dividing the solidified reaction product, leaching out alkali metal halide with water and then heating the resultant finely divided material to a temperature of at least 200.degree. C but below its melting point under a vacuum to remove the water and aromatic sulphone by distillation.

REFERENCES:
patent: 3647751 (1972-03-01), Darsow
patent: 3928295 (1975-12-01), Rose

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