| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method of manufacturing a golf ball including a step of preparing a master batch made of unsaturated carboxylic acid and/or its metal salt. <P>SOLUTION: The method of manufacturing golf balls includes the steps of pre-preparing a masterbatch of an unsaturated carboxylic acid and/or a metal salt thereof by mixing an unsaturated carboxylic acid and/or a metal salt thereof with a rubber material, preparing a rubber composition that contains the rubber material by using the masterbatch, and employing a material obtained by molding the rubber composition under heat as a golf ball component, wherein the masterbatch is composed of: (A) a modified polybutadiene obtained by a modification reaction wherein a polybutadiene having an active end is modified at the active end with at least one type of alkoxysilane compound, and (B) a diene rubber other than ingredient (A); and (C) an unsaturated carboxylic acid and/or its metal salt thereof. The present invention relates to an industrially beneficial method for manufacturing golf balls which has improved dispersibility of the inorganic filler (C) component in a rubber composition, and has further enhanced resilience and durability of the rubber molded material. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
