Polyketones

Details Polyketones Polyketones

2007-01-09

2007-01-09

Boykin, Terressa (Department: 1711)

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

Synthetic resins

Treating polymer containing material or treating a solid...

C528S220000, C528S480000, C528S481000, C528S494000

Reexamination Certificate

active

10478997

ABSTRACT:
Method of purifying a polymeric material of a type which includes (A) phenyl moieties; (B) carbonyl and/or sulphone moieties; and; (C) ether and/or thioether moieties. The method includes contacting the polymeric material with a solvent formulation which is at a temperature of greater than 100° C. and a pressure above ambient pressure thereby to charge the solvent formulation with impurities derived from the polymeric material, and separating the charged solvent from the polymeric material.

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Colquhoun, Howard M., et al; “Synthesis of Aromatic Polyetherketones in Trifluoromethanesulphonic Acid”;Polymer, vol. 29, No. 10, pp. 1902-1908, (1988), XP000986259.

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