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US 5,929,189 AGranted
Golf ball
AssigneeBridgestone Sports Co., Ltd.
InventorsYasushi Ichikawa, Shunichi Kashiwagi
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Abstract
A golf ball comprises a core and a cover enclosing the core. The cover resin is composed mainly of a thermoplastic polyurethane elastomer having an aliphatic diisocyanate component and exhibiting a tan .delta. peak temperature of not higher than -20.degree. C. in viscoelasticity measurement.
Claims11
A golf ball comprising a core and a cover enclosing the core, wherein
- said cover resin is composed mainly of a thermoplastic polyurethane elastomer having an aliphatic diisocyanate component selected from the group consisting of hexamethylene diisocyanate. 2, 2, 4 or 2, 4, 4-trimethylhexamethylene diisocyanate and lysine diisocyanate and exhibiting a tan .delta. peak temperature of not higher than -20.degree. C. in viscoelasticity measurement.
Dependencies are inferred from the claim text.