Process for the reduction of sulfoxide groups in polymers

Details Process for the reduction of sulfoxide groups in polymers Process for the reduction of sulfoxide groups in polymers

C - Chemistry, Metallurgy

08

G

C08G 75/02 (2006.01) C08G 75/18 (2006.01)

Patent

CA 2133802

Abstract The invention relates to a process for the preparation of polymer sulfides, which comprises treating compounds containing sulfoxide linking groups of the formula (I) -[(Ar1)n-X]n-[(Ar2)i-Y)]j-[(Ar3)k-Z)]l-[(Ar4]o-W)]p- (I) in which the symbols and indices have the following meaning: Ar1, Ar2, Ar3 and Ar4 are identical or different arylene systems having 6 to 18 carbon atoms, W, X, Y and Z are identical or different -SO2-, -S-, -SO-, -CO, -O-, -CO2-, alkylene or alkylidene groups having 1 to 6 carbon atoms, preferably 1 to 4 carbon atoms, where at least one linking group W, X, Y or Z must be an -SO- group, n, m, i, j, k, l, o and p are, identically or differently, 0 or an integer 1, 2, 3 or 4, where their total must be at least 2, a) thermally or b) in the presence of active hydrogen or c) photochemically and reducing to give the corresponding sulfides.

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