C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
402/320
C08F 283/00 (2006.01) C08G 75/00 (2006.01) C08G 75/20 (2006.01) C08L 81/00 (2006.01)
Patent
CA 1304536
TITLE "A Method of Manufacturing Halogenated Aromatic Polysulfone Compounds and the Compounds so Produced" INVENTORS Michael D. Guiver Oleh Kutowy ABSTRACT OF DISCLOSURE Halogenation of Udel (trademark) and Radel (trademark) polysulfone occurs readily by electrophilic substitution. The reactive substltuelon position is situated ortho- to the aryl ether linkage in the Bisphenol-A portion of the repeat units. Halogenated polysulfone are obtained by reaction of the polymer with elemental halogen. Thus, a solution of Udel polysulfone in chloroform, treated with excess bromine at room temperature, gives dibrominated polysulfone III in high yield. The degree of substitution after 18-24 hours is typically 1.80 to 2.05 by bromine analysis. Similar results are obtained by reaction of the polymer with elemental chlorine. Lower degrees of substitution are obtained with shorter reaction times or using lesser amounts of halogen.
554118
Guiver Michael Dominic
Kutowy Oleh
Anderson J. Wayne
Guiver Michael Dominic
Kutowy Oleh
National Research Council Of Canada
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