| 摘要 |
<p>PURPOSE:To provide a solid golf ball excellent in performances of durability, etc., and productivity by composing base material rubber of a mixture of specified poly-butadien rubber, reaction liquefied poly--butadien and/or reaction liquefied acrylonitril-butadien copolymer. CONSTITUTION:A solid golf ball has at least a part of an elastic part formed of a rubber composition including base material rubber, cocrosslinking agent and organic peroxide. The base material rubber is made of a mixture of polybutadien rubber having at least 40% of (A)cis-1.4 bond, reaction formation liquefied poly-butadien rubber having calboxy group on both molecular chain ends and/or reaction formation liquefied acrylonitril butadien copolymer, and the mixing weight ratio is preferably within the range of Polybutadien rubber(A)/reaction liquefied polymer(B) = 98/2-80/20. Also, for the cocrosslinking agent is used usually 15-60wt parts of unsaturated carboxylic acid and/or the metallic salt to 100wt parts of the base material rubber.</p> |
