US 12,083,388 B2
Golf ball including delusterant and method for producing the same
Hirotaka Shinohara, Chichibu (JP)
Assigned to BRIDGESTONE SPORTS CO., LTD., Tokyo (JP)
Filed by BRIDGESTONE SPORTS CO., LTD., Tokyo (JP)
Filed on Apr. 22, 2022, as Appl. No. 17/726,911.
Claims priority of application No. 2021-102574 (JP), filed on Jun. 21, 2021.
Prior Publication US 2022/0401796 A1, Dec. 22, 2022
Int. Cl. A63B 37/06 (2006.01); A63B 37/00 (2006.01)
CPC A63B 37/00222 (2020.08) [A63B 37/00221 (2020.08)] 4 Claims
OG exemplary drawing
 
1. A golf ball comprising:
a core;
a cover located outside the core and having a plurality of dimples; and
a coating layer located outside the cover and containing a delusterant, a surface of the coating layer having an average roughness Ra of at least 0.35,
wherein a surface of the golf ball has a static friction coefficient of at least 0.20, which is obtained by
(i) the delusterant comprising silica having a hydrophilic treated surface;
(ii) the coating layer comprising water-repellent additive in an amount sufficient so that the surface of the golf ball has a surface energy of at least 40 dyn.