Invention Grant
- Patent Title: Golf ball
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Application No.: US12222487Application Date: 2008-08-11
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Publication No.: US08389607B2Publication Date: 2013-03-05
- Inventor: Hirotaka Nakamura , Keiji Ohama
- Applicant: Hirotaka Nakamura , Keiji Ohama
- Applicant Address: JP Kobe
- Assignee: SRI Sports Limited
- Current Assignee: SRI Sports Limited
- Current Assignee Address: JP Kobe
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JP2007-238934 20070914
- Main IPC: A63B37/12
- IPC: A63B37/12 ; C08L75/08 ; C08K5/3475

Abstract:
Golf ball 2 has core 4, cover 6 and paint layer 12. The base polymer of the cover 6 includes a thermoplastic polyurethane elastomer. The cover 6 includes a benzotriazole based ultraviolet ray absorbing agent, a hindered amine light stabilizer and a hindered phenol heat resistance stabilizer. Provided that the molar concentration of the benzotriazole based ultraviolet ray absorbing agent is defined as A; the molar concentration of the hindered amine light stabilizer is defined as B; and the molar concentration of the hindered phenol heat resistance stabilizer is defined as C, the molar ratio (B/A) is 0.01 or greater and 0.5 or less, and the molar ratio [(B+C)/A] is 0.1 or greater and 1.5 or less. Preferably, the hindered amine light stabilizer does not have a hindered phenol group in the molecule. Preferably, the principal component of the elastomer is a reaction product of MDI and polyether polyol.
Public/Granted literature
- US20090075758A1 Golf ball Public/Granted day:2009-03-19
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