Abstract: The invention provides a method for preparing a material which includes an ionomer blend composition containing a polysilsesquioxane, has a good inorganic filler dispersibility and a good moldability (mold releasability), and has an excellent scuff resistance and coefficient of restitution. The invention also provides a golf ball made using such a material. The ionomer blend composition is an ionomer-based material wherein the polysilsesquioxane and the ionomer are at least partly chemically bonded therebetween, and which has excellent properties such as coefficient of restitution and scuff resistance.