Patent ID: 9119990
Filing Date: 2015-09-01
Classification: A63B,C08L,C09D

Abstract:
1. A method for manufacturing a golf bail, the method comprising: molding a thermoplastic polyurethane material around a golf ball core to form a cover layer substantially surrounding the core, the thermoplastic polyurethane material having an isocyanate index of less than or equal to about 95; coating the cover with a polyurethane coating material comprising 20 to 65 weight percent solvent to form a coating layer substantially surrounding the cover layer, the polyurethane coating material having an isocyanate index of greater than or equal to about 105; allowing the polyurethane coating material to remain in an unreacted state on the cover for a period of time from about 5 minutes to about one hour to penetrate into the cover laver; and curing the coating layer, such that the thermoplastic polyurethane cover layer crosslinks with the polyurethane coating material, wherein the step of curing the coating layer comprises heating the golf ball and crosslinking the cover layer with the polyurethane coating material to a depth into the cover layer of at least 5% of the thickness of the cover layer.