Golf ball
AssigneesBridgestone Tire Company Limited, Toray Industries, Inc.
InventorsTasuku Saito, Tutomu Noma, Tsutomu Matsunaga, Chiaki Tanaka, Yoko Furuta, Nagayoshi Naito
Life of this patent
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Abstract
An improved golf ball having a thread-wound central core and an outer cover is provided. The outer cover is composed of a composition comprising (a) at least one ionomer which is a copolymer of at least one .alpha.-olefin and at least one .alpha.,.beta.-unsaturated carboxylic acid to which copolymer at least one metal ion selected from the group consisting of monovalent, divalent and trivalent metal ions is added and (b) at least one polyester elastomer, the content, in said composition, of said polyester elastomer being 50% by weight or less. This golf ball has excellent cutting resistance, "click" characteristics and impact resilience.
Claims11
In a golf ball comprising a thread-wound central core and an outer cover for the core;
- the improvement wherein said outer cover is composed of a composition comprising (a) at least one ionomer which is a copolymer of 75 to 99.8 mole % of at least one .alpha.-olefin and 0.2 to 25 mole % of at least one .alpha.,.beta.-unsaturated carboxylic acid to which copolymer at least one metal ion selected from the group consisting of monovalent, divalent and trivalent metal ions is added and (b) at least one polyester elastomer selected from the group consisting of a polyetherester block copolymer, polylactone-ester block copolymer, aliphatic or aromatic dicarboxylic acid copolyester and a mixture of aliphatic dicarboxylic acid copolyester and aromatic dicarboxylic acid copolyester, the content, in said composition, of said polyester elastomer being 3 to 50% by weight.
Dependencies are inferred from the claim text.