Golf ball
AssigneeBridgestone Sports Co., Ltd.
InventorMasahiro Yamabe
Life of this patent
Estimating the term…
Abstract
In a golf ball having a core of at least one layer and a cover of at least one layer encasing the core, at least one layer of the cover is formed of a resin composition which includes (I) a polyurethane or a polyurea, (II) a thermoplastic polyester elastomer and (III) an aromatic vinyl elastomer. The thermoplastic polyester elastomer serving as component (II) and the aromatic vinyl elastomer serving component (III) have specific respective contents and properties, including Shore D hardnesses and rebound resiliences. The golf ball has an excellent controllability on approach shots without a loss of distance on driver shots. In addition, the scuff resistance and moldability are good.
Claims7
A golf ball comprising a rubber core of at least one layer and a cover of at least one layer encasing the core, wherein at least one layer of the cover is formed of a resin composition comprising:
- (I) a polyurethane or a polyurea,
- (II) a thermoplastic polyester elastomer, and
- (III) an aromatic vinyl elastomer;
- the thermoplastic polyester elastomer serving as component (II) having a Shore D hardness of 45 or less, a rebound resilience of from 50 to 72%, a melt viscosity at 200° C. and a shear rate of 243 sec−1 of 1.0×104 dPa·s or less, and being included in an amount of 20 parts by weight or less per 100 parts by weight of component (I);
- and the aromatic vinyl elastomer serving as component (III) having a Shore D hardness of 30 or less and a rebound resilience of 30% or less, and being included in an amount of 20 parts by weight or less per 100 parts by weight of component (I).
Dependencies are inferred from the claim text.