Rubber composition for golf ball, and golf ball
AssigneeBridgestone Sports Co., Ltd.
InventorTsuyoshi Nakajima
Life of this patent
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Abstract
A rubber composition for golf balls includes (A) a base rubber, (B) two different metal salts of α,β-unsaturated carboxylic acids having 3 to 8 carbon atoms, (C) a metal salt in which at least one bonding site is a fatty acid of 9 or more carbon atoms, and (D) a crosslinking initiator. Letting component (B) include (B-1) an unsaturated metal carboxylate in a high compounding weight and (B-2) an unsaturated metal carboxylate in a low compounding weight, the ratio (B-2)/(B-1) is from 4 to 20 wt % and the ratio (B-2)/(C) is from 20 to 115 wt %. By using this rubber composition in a golf ball core, the golf ball can be endowed with both good spin properties and good durability on impact.
Claims9
A rubber composition for golf balls, comprising:
- (A) a base rubber,
- (B) two different metal salts of α,β-unsaturated carboxylic acids having 3 to 8 carbon atoms,
- (C) a metal salt in which at least one bonding site is a fatty acid of 9 or more carbon atoms, and
- (D) a crosslinking initiator,
- wherein, component (B) includes (B-1) an unsaturated metal carboxylate in a high compounding weight and (B-2) an unsaturated metal carboxylate in a low compounding weight, the ratio (B-2)/(B-1) is from 4 to 20 wt % and the ratio (B-2)/(C) is from 20 to 115 wt %, and component (C) is selected from the group consisting of zinc monostearate monopalmitate, zinc monostearate monomyristate, zinc monostearate monolaurate, zinc monopalmitate monomyristate, zinc monopalmitate monolaurate, zinc monostearate monoacrylate, zinc monostearate monomethacrylate, zinc monostearate monomaleate, zinc monostearate monofumarate, zinc monopalmitate monoacrylate, zinc monopalmitate monomethacrylate, zinc monopalmitate monomaleate, zinc monopalmitate monofumarate, zinc monomyristate monoacrylate, zinc monomyristate monomethacrylate, zinc monomyristate monomaleate, zinc monomyristate monofumarate, zinc monolaurate monoacrylate, zinc monolaurate monomethacrylate, zinc monolaurate monomaleate and zinc monolaurate monofumarate.
Dependencies are inferred from the claim text.