Patent ID: 7086970

Claim:
A multi-piece golf ball comprising: a core having a diameter of 30 to 40 mm, said core being made from a rubber composition mainly containing polybutadiene; at least one intermediate layer including the outermost layer having a thickness of 0.5 to 2.0 mm, said outermost layer being made from a resin material containing an ionomer resin in an amount of 30% by weight or more; and a cover having a thickness of 0.5 to 2.0 mm, said cover being made from a material obtained by dispersedly blending at least one kind of silicone powder selected from a silicone rubber powder, a silicone resin powder, and a composite powder thereof, in a main resin component containing an ionomer resin in an amount of 50% by weight or more, wherein the hardness of said outermost layer of said at least one intermediate layer is harder than the hardness of a center portion of said core, the hardness of said cover is harder than the hardness of said outermost layer of said at least one intermediate layer, and a difference in hardness between said cover and the center portion of said core satisfies a relation of 10 ≦Durometer D hardness of cover−Durometer D hardness of center portion of core)≦40, and an average particle size of said silicone powder is in a range of 0.5 to 700 μm.