Golf ball
AssigneeBridgestone Sports Co., Ltd.
InventorKatsunobu MOCHIZUKI
Life of this patent
Estimating the term…
Abstract
In a golf ball having a rubber 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 that includes (I) a polyurethane or a polyurea and (II) an aromatic vinyl elastomer, the amount of component (II) included per 100 parts by weight of component (I) is less than 15 parts by weight, and the CS1 value calculated by formula (1) below C S 1 = ( C V 5 0 - C V 1 2 ) / 38 ( 1 ) (wherein CV50 is the coefficient of restitution at an incident velocity of 50.0 m/s and CV12 is the coefficient of restitution at an incident velocity of 12.0 m/s) is larger than −4.08×10−3, so that the golf ball has both an excellent controllability and a good feel at impact on approach shots together with a good scuff resistance.
Claims8
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, and
- (II) an aromatic vinyl elastomer;
- the amount of component (II) included per 100 parts by weight of component (I) is less than 15 parts by weight;
- and
- the CS1 value calculated by formula (1) below
- C
-
- S
- 1
- =
- (
- C
-
- V
- 5
-
- 0
- -
- C
-
- V
- 1
-
- 2
- )
- /
- 38
- (
- 1
- )
- (wherein CV50 is the coefficient of restitution at an incident velocity of 50.0 m/s and CV12 is the coefficient of restitution at an incident velocity of 12.0 m/s) is larger than −4.08×10−3.
Dependencies are inferred from the claim text.