Solid golf balls and method of making
AssigneeBridgestone Sports Co., Ltd.
InventorsYasushi Ichikawa, Shunichi Kashiwagi, Rinya Takesue, Nobuhiko Matsumura, Kunitoshi Ishihara
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Abstract
A solid golf ball has a solid core and a cover formed of a resin composition comprising the reaction product of a thermoplastic polyurethane elastomer with an isocyanate compound. The ball is efficiently moldable and meets such requirements as a pleasant feel, ease of control, high resilience, and minimized scuffs by iron shots.
Claims8
A solid golf ball comprising a solid core and a cover enclosing the core, said cover being formed of a resin composition primarily comprising the reaction product of a thermoplastic polyurethane elastomer with an isocyanate compound.
A method for preparing a solid golf ball, comprising the steps of:
- placing a solid core in a golf ball mold, and
- injection molding a cover stock around the surface of said solid core,
- the molding step including adding an isocyanate compound to a thermoplastic polyurethane elastomer in such amounts that the thermoplastic polyurethane elastomer remains at a thermoplastic level sufficient to allow injection molding, heating and melting them for reaction to form an elastomer, and injecting the cover stock based on the elastomer.
A method for preparing a solid golf ball, comprising the steps of:
- placing a solid core in a golf ball mold, and
- injection molding a cover stock around the surface of said solid core, said cover stock primarily comprising a dry blend of a thermoplastic polyurethane elastomer and an isocyanate compound whereby the dry blend is kneaded and reacted while it is injection molded.
Dependencies are inferred from the claim text.