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US 8,148,474 B2Granted
Golf ball
AssigneeSRI Sports Limited
InventorsKeiji Ohama, Hirotaka Nakamura, Toshiyuki Tarao
Life of this patent
Estimating the term…
Abstract
An object of the present invention is to provide a golf ball which has excellent durability and wear-resistance and provides an excellent shot feeling. The present invention is directed to a golf ball comprising: a core; and a cover covering the core, wherein the cover is formed from a cover composition containing a thermoplastic polyurethane (A), a polyisocyanate (B) having at least two isocyanate groups, and a polyhydroxyether (C) as a resin component, and wherein the core has a surface hardness of 85 or smaller in JIS-C hardness.
Claims18
A golf ball comprising:
- a core;
- and
- a cover covering the core,
- wherein the cover is formed from a cover composition containing a thermoplastic polyurethane (A), a polyisocyanate (B) having at least two isocyanate groups, and a polyhydroxyether (C) as a resin component,
- wherein the core has a surface hardness of 85 or smaller in JIS-C hardness, and wherein the polyhydroxyether (C) has a repeating structural unit represented by Formula (1):
- wherein R1 and R2 are the same or different from each other, and each are a hydrogen atom or a methyl group.
3 more elements
A golf ball comprising:
- a core;
- and
- a cover covering the core,
- wherein the cover is formed from a cover composition containing a thermoplastic polyurethane (A), a polyisocyanate (B) having at least two isocyanate groups, and a polyhydroxyether (C) represented by the following formula(2) as a resin component, and
- wherein the core has a surface hardness of 85 or smaller in JIS-C hardness
- wherein R3, R4, R5, R6 are the same or different from each other, and each are a hydrogen atom or a methyl group;
- X and Y are the same or different from each other, and each are an epoxy group or a hydroxyethyl group;
- and n is a positive integer.
5 more elements
Dependencies are inferred from the claim text.