Improvement of melting stability of polymer

Abstract

Abstract PURPOSE: To obtain a polymer having excellent melting stability treating a poly(arylene sulfide ketone) or poly(arylene sulfide sulfone) with a Ca cation. CONSTITUTION: (A) A polyhaloaromatic ketone (e.g. 4,4'-dichlorobenzophenone) or polyhaloaromatic sulfone [e.g. bis(p-chlorophenyl)sulfone) and (B) an alkali metal oxide obtd. by bringing an alkaline metal sulfide (e.g. NaSH) and alkali metal hydroxide (e.g. NaOH) into reaction at a molar ratio of 0.95 to 1.05:1 are polymerized in water and polar org. solvent (e.g. N-methyl-2-pyrrolidone), by which the poly(arylene sulfide ketone) having an internal viscosity of ≥0.3 or the poly(arylene sulfide sulfone) having an internal viscosity of ≥0.25 is obtd. Next, the polymer is brought into reaction with a dilute aq. soln of an alkali metal base (e.g. NaOH) at need and is then immersed into a Ca (e.g. CaCl 2 ) soln. of a concn. of 0.1 to 5 wt.%, by which the polymer is brought into contact with the Ca salt for 0.5 minute to 3 hours at a temp. of 100 to 200°C under a pressure of 15 to 1500 psig. COPYRIGHT: (C)1989,JPO

Inventors

• 👤 Michael Duane Cliffton
• 👤 Jon Frederick Geibel

Bibliographic Details