The golf ball piececapsule

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PROBLEM TO BE SOLVED : To provide a golf ball 2 excellent in a flying performance. SOLUTION : The golf ball 2 has a core, a cover and many dimples 8. The core includes polybutadiene synthesized by using a rare earth element catalyst. The rubber composition of the core includes a polysulfide compound containing a bromo group. The main component of the cover is an ionomer resin. The cover has the thickness of COPYRIGHT : (C)2008, JPO&INPIT