group, R9 is a hydrogen atom or a substituted or unsubstituted C1 -C20 organic monovalent group, and c is 0 or 1 in the presence of a platinum catalyst (e.g. chloroplatinic acid, etc.) Other examples of methods for preparing the organic polymer having the reactive silicone group are as follows: (1) Polyisocyanate compound such as toluenediisocyanate is reacted with polyalkyleneoxide having termina