One-piece golf ball

文件类型：PDF文档
文件大小：65K
PROBLEM TO BE SOLVED : To provide a one-piece golf ball excellent in extrusion moldability, in a hitting feeling, in resilience and in flying capability. SOLUTION : The one-piece golf ball has a vulcanized molded product made of a rubber composition including 10-40 pts.wt. of methacrylic acid, 10-60 pts.wt. of a zinc oxide, and 0.9-5 pts.wt. of an organic peroxide to 100 pts.wt. of a rubber base material containing 60-100 wt.% of a polybutadiene synthesized by using a rare earth-based catalyst containing at least 95 wt.% of cis-1, 4-bond and 1.7% or less of 1, 2-vinyl bond, and having a 5 wt.% toluene solution viscosity η at 25°C of from 280 mPa s to 475 mPa s, and a Mooney viscosity (ML1+4(100°C)) of at least 40. The one-piece golf ball has excellent extrudability, and is excellent in hitting feeling and resilience. COPYRIGHT : (C)2011, JPO&INPIT