Golf ball
AssigneeBridgestone Sports Co., Ltd.
InventorsTsuyoshi NAKAJIMA, Yuichiro OZAWA
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Abstract
The invention provides a golf ball having a core and a cover of one layer or a plurality of layers, the core being formed of a material molded under heat from a rubber composition which includes (A) a base rubber, (B) an organic peroxide, and (C) water and/or a metal monocarboxylate. The product P×E of the difference P (mol/m3) in crosslink density between the core surface and the core center, as measured based on a toluene swelling test, multiplied by the deflection E (mm) of the core when compressed under a final load of 1,275 N (130 kgf) from an initial load state of 98 N (10 kgf) is at least 28×102 mol/m3·mm.
Claims9
A golf ball comprising a core and a cover of one layer or a plurality of layers, wherein the core is formed of a material molded under heat from a rubber composition comprising the following components (A) to (C):
- (A) a base rubber,
- (B) an organic peroxide, and
- (C) (C-I) water and/or (C-II) a metal monocarboxylate and a metal dicarboxylate;
- wherein the difference between the crosslink density at the core surface and the crosslink density at the core center, both of which are crosslink densities measured based on a toluene swelling test, is at least 9×102 mol/m3.
Dependencies are inferred from the claim text.