US 11,872,451 B2
Golf ball
Kuniyasu Horiuchi, Kobe (JP); Toshiyuki Tarao, Kobe (JP); Hidetaka Inoue, Kobe (JP); and Kazuya Kamino, Kobe (JP)
Assigned to SUMITOMO RUBBER INDUSTRIES, LTD., Kobe (JP)
Filed by Sumitomo Rubber Industries, Ltd., Kobe (JP)
Filed on Oct. 20, 2021, as Appl. No. 17/506,181.
Application 17/506,181 is a continuation of application No. 16/818,673, filed on Mar. 13, 2020, granted, now 11,235,204.
Claims priority of application No. 2019-060594 (JP), filed on Mar. 27, 2019; and application No. 2019-192018 (JP), filed on Oct. 21, 2019.
Prior Publication US 2022/0032127 A1, Feb. 3, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. A63B 37/00 (2006.01); C09D 175/08 (2006.01); C08K 3/36 (2006.01); C08L 75/04 (2006.01); C08G 18/32 (2006.01); C08G 18/73 (2006.01); C08G 18/66 (2006.01); C08G 18/10 (2006.01); C08K 7/26 (2006.01); C08G 18/48 (2006.01); C09D 7/61 (2018.01); C08G 18/75 (2006.01); C08G 18/12 (2006.01); C08K 3/34 (2006.01)
CPC A63B 37/0037 (2013.01) [A63B 37/003 (2013.01); A63B 37/0041 (2013.01); A63B 37/0047 (2013.01); A63B 37/0075 (2013.01); A63B 37/0096 (2013.01); A63B 37/00221 (2020.08); A63B 37/00222 (2020.08); C08G 18/10 (2013.01); C08G 18/3203 (2013.01); C08G 18/4854 (2013.01); C08G 18/6677 (2013.01); C08G 18/73 (2013.01); C08K 7/26 (2013.01); C08L 75/04 (2013.01); C09D 7/61 (2018.01); C09D 175/08 (2013.01); C08G 18/12 (2013.01); C08G 18/755 (2013.01); C08K 3/34 (2013.01); C08K 3/36 (2013.01)] 19 Claims
 
1. 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 an outermost layer of the paint film located at the outermost layer of the golf ball contains a base resin and a porous filler,
the base resin contains a polyurethane obtained by a reaction between (A) a polyisocyanate composition and (B) a polyol composition containing a urethane polyol as a polyol component,
the porous filler contains SiO2 in an amount of 50 mass % or more and 95 mass % or less as a constituent component, and
a loss tangent (tanδ) of the outermost layer of the paint film measured with a dynamic viscoelasticity measuring apparatus under following conditions has a peak temperature in a range of from −40° C. to 40° C.:
<measurement conditions>
measuring mode: tensile mode
measuring temperature: −100° C. to 150° C.
temperature increasing rate: 4° C./min
oscillation frequency: 10 Hz
measuring strain: 0.1%.