In another aspect, the invention relates to a process for producing a polymerizible alkoxy siloxane oligomer comprising reacting one or more silane monomers of formula (RO)3 Si FG, wherein R is methyl or ethyl, and FG is an independently chosen radical substituted with an epoxy, 1-alkenyl, acrylate or methacrylate group as described above, with 0.5 to 2.5 equivalents of water in the presence of an