a), ?? has an average value of 0 to 2000, ?? has an average value of 1 to 500, each R9 is independently a hydrogen atom or a monovalent organic group with the provisos that at least one R9 is a hydrogen atom or an unsaturated monovalent organic group and each R9 is not an epoxy group or alkoxy group, each R10 is independently a fluoro-functional hydrocarbon group.