Golf ball
AssigneeBridgestone Sports Co., Ltd.
InventorsMasahiro YAMABE, Katsunobu MOCHIZUKI
Life of this patent
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Abstract
In a golf ball having a core of at least one layer and a cover of one or more 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 which together satisfy certain specific conditions. The golf ball has an excellent controllability on approach shots and is also able to maintain a good scuff resistance.
Claims11
A golf ball comprising a core of at least one layer and a cover of one or more 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, and
- letting HMa (N/mm2) be the Martens hardness of the resin material of component (I), HMb (N/mm2) be the Martens hardness of the cover layer formed of the resin composition containing components (I) and (II), HMa and HMb satisfy formula (1) below
- 0.990≤HMa/HMb≤1.500 (1)
- and wherein the component (II) has a material hardness of from 10 to 40 on the Shore D hardness scale.
Dependencies are inferred from the claim text.