US 11,724,160 B2
Methods for treating golf balls having a thermoplastic polyurethane cover
Michael J. Sullivan, Old Lyme, CT (US); and Mark L. Binette, Mallapoisett, MA (US)
Assigned to Acuchnet Companv, Fairhaven, MA (US)
Filed by Acushnet Company, Fairhaven, MA (US)
Filed on Jul. 25, 2022, as Appl. No. 17/872,134.
Application 16/522,817 is a division of application No. 15/786,644, filed on Oct. 18, 2017, granted, now 10,363,458, issued on Jul. 30, 2019.
Application 17/872,134 is a continuation of application No. 16/994,802, filed on Aug. 17, 2020, granted, now 11,395,943.
Application 16/994,802 is a continuation of application No. 16/522,817, filed on Jul. 26, 2019, granted, now 10,744,375, issued on Aug. 18, 2020.
Application 15/786,644 is a continuation in part of application No. 15/710,866, filed on Sep. 21, 2017, granted, now 10,252,113, issued on Apr. 9, 2019.
Prior Publication US 2022/0362635 A1, Nov. 17, 2022
Int. Cl. A63B 37/06 (2006.01); A63B 37/00 (2006.01); A63B 1/00 (2006.01); A63B 45/00 (2006.01)
CPC A63B 37/00221 (2020.08) [A63B 1/00 (2013.01); A63B 37/0024 (2013.01); A63B 37/0076 (2013.01); A63B 37/0077 (2013.01); A63B 45/00 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method for forming a coated golf ball, comprising the steps of:
providing a golf ball comprising at least one core layer and an outer cover layer, wherein the outer cover layer is formed from a thermoplastic polyurethane composition;
applying a first polyurethane coating comprising unreacted isocyanate groups and unreacted amine groups to the outer cover layer, the first polyurethane coating having an isocyanate index of at least about 115;
treating the golf ball with heat; and
applying a second polyurethane coating to the outer cover of the golf ball to form a coated golf ball, the second polyurethane coating having an isocyanate index of less than 96.