Patent ID: 6020442
Filing Date: 2000-02-01
Classification: C08G

Abstract:
An oxidized polyarylene sulfide in which a portion of recurring units of the formula.brket open-st.C.sub.6 H.sub.4 --S.brket close-st.has been oxidized, said polyarylene sulfide having been oxidized while in particulate form, said oxidized polyarylene sulfide consisting essentially of recurring units of the formula.brket open-st..paren open-st.C.sub.6 H.sub.4 --S.paren close-st..sub.a .paren open-st.C.sub.6 H.sub.4 --SO.paren close-st..sub.b .brket close-st.which:the sulfur/oxygen ratio is from 1:0.1 to 1:1, anda and b are each greater than zero but their sum is always 1;said oxidized polyarylene sulfide having remained in particulate form throughout the oxidation and having an infrared spectrum indicating essentially selective oxidation of the arylene sulfide groups to arylene sulfoxide groups.