| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a golf ball that reduces spins when hit with a driver, and has excellent flight performance. <P>SOLUTION: This golf ball comprises a crosslinked molding of a rubber composition containing: (A) a base material rubber which contains a polybutadiene containing a cis-1,4 bond of at least 60 wt.%; (B) an unsaturated carboxylic acid and/or a metal salt thereof; (C) an organosulfur compound; (D) one or more organic peroxide selected from a group consisting of peroxyketals and/or dialkyl peroxides; and (E) one or more organic peroxide selected from a group consisting of hydroperoxides. In the golf ball, a value obtained by subtracting a center hardness from a surface hardness of the crosslinked molding is at least 20 in JIS-C hardness. <P>COPYRIGHT: (C)2012,JPO&INPIT |
