Invention Grant
- Patent Title: Golf ball
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Application No.: US16719349Application Date: 2019-12-18
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Publication No.: US11731006B2Publication Date: 2023-08-22
- Inventor: Yasuo Naito , Yuko Oka , Shimpei Oyama , Tetsuro Abe , Kazuyoshi Shiga
- Applicant: Sumitomo Rubber Industries, Ltd.
- Applicant Address: JP Kobe
- Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
- Current Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
- Current Assignee Address: JP Kobe
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JP 18236983 2018.12.19 JP 19155871 2019.08.28
- Main IPC: A63B37/14
- IPC: A63B37/14 ; A63B37/00

Abstract:
An object of the present invention is to provide a novel golf ball having excellent spin performance on approach shots. The present invention provides a golf ball comprising a golf ball body and a paint film composed of at least one layer and formed on a surface of the golf ball body, wherein a base resin constituting an outermost layer of the paint film is a polyurethane obtained by a reaction between (A) a polyol composition and (B) a polyisocyanate composition, and a loss modulus (E″) at the temperature of −50° C. obtained by measuring a dynamic viscoelasticity of the polyurethane is 1.00×108 Pa or more.
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