| 简介 |
PROBLEM TO BE SOLVED : To provide a golf ball having an excellent rebound and durability.
SOLUTION : The golf ball having a ball component made of a material molded under heat from a rubber composition which includes as essential ingredients : (A) from 1 to 50% by mass of a modified polybutadiene obtained by a modification reaction wherein a polybutadiene having a vinyl content of from 0 to 2%, a cis-1, 4 bond content of at least 80% and an active end is modified at the active end with at least one type of alkoxysilane compound, and (B) at least 50% by mass of polybutadiene synthesized using a rare-earth catalyst and having a stress relaxation time (T80) of less than 4.0. The rubber composition additionally includes the following per 100 parts by mass of ingredients (A) and (B) combined : (C) from 10 to 50 parts by mass of an unsaturated carboxylic acid and/or a metal salt thereof, (D) from 5 to 80 parts by mass of an inorganic filler, and (E) from 0.1 to 10 parts by mass of an organic peroxide. According to this invention, by using such a rubber composition having an improved resilience and durability as a golf ball component, the performance of the golf ball can be improved.
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