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US 2009/0264221 A1Published application
Golf ball
AssigneeSRI Sports Limited
InventorToshiyuki TARAO
Life of this patent
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Abstract
The object of the present invention is to provide a golf ball having superior abrasion resistance, durability and spin performance. The present invention provides a golf ball of the present invention has a core and a cover, wherein the cover is formed from a cover composition that contains, as a resin component, a thermoplastic polyurethane (A) and a urethane prepolymer (B) having two or more isocyanate groups.
Claims18
A golf ball comprising a core and a cover,
- wherein the cover is formed from a cover composition that contains, as a resin component, a thermoplastic polyurethane (A) and a urethane prepolymer (B) having two or more isocyanate groups.
A golf ball comprising a core and a cover,
- wherein the cover is formed from a cover composition that contains, as a resin component, a urethane prepolymer (B) having two or more isocyanate groups in an amount of 1 part to 50 parts with respect to 100 parts of a thermoplastic polyurethane (A) by mass,
- the thermoplastic polyurethane (A) has a flow beginning temperature (TA) from 100° C. to 210° C., and a melt viscosity (ηA) at 210° C. from 1,000 P to 45,000 P,
- the urethane prepolymer (B) has a NCO content from 2.0 mass % to 7.0 mass %.
A process for manufacturing a golf ball having a core and a cover covering the core, comprising
- mixing a thermoplastic polyurethane (A) and a urethane prepolymer (B) having two or more isocyanate groups to form a reaction mixture,
- preparing the cover composition comprising the reaction mixture, and
- molding the cover composition into the cover.
Dependencies are inferred from the claim text.