To provide a golf ball using an injection molding of a disclosed golf ball material as a cover material or the like, which is excellent in rebound and durability though having a low hardness.
The golf ball material is a resin mixture composed of (a) an olefin-methacrylic acid copolymer and/or an olefin-methacrylic acid-unsaturated carboxylic acid ester copolymer having a weight-average molecular weight (Mw) in a specific range and a weight-average molecular weight (Mw) to number-average molecular weight (Mn) ratio in a specific range, or a metal neutralization product thereof, (b) an olefin-acrylic acid copolymer and/or an olefin-acrylic acid-unsaturated carboxylic acid ester copolymer having a weight-average molecular weight (Mw) in a specific range and a weight-average molecular weight (Mw) to number-average molecular weight (Mn) ratio in a specific range, or a metal neutralization product thereof, (c) an organic acid or a metal salt thereof, and (d) a basic inorganic metal compound for neutralizing acid groups in the components (a) to (c), which resin mixture has a Shore D hardnesss in a predetermined range.
TAKEHANA EIJI
| JP2012061312A | 2012-03-29 | |||
| JP2008212666A | 2008-09-18 |
Saori Shigematsu
Katsunari Kobayashi
Takeshi Ishikawa
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