Patent ID: 8678951
Filing Date: 2014-03-25
Classification: A63B

Abstract:
1. A golf ball comprising a core and a three-layer cover, the cover comprising: a thermoplastic inner cover layer disposed about the core and having a material hardness of about 60 Shore D to about 80 Shore D; a thermoset outer cover layer comprising a polyurethane, polyurea, or hybrid thereof and having a material hardness of about 20 Shore D to about 60 Shore D; and a thermoset intermediate cover layer disposed between the inner and outer cover layers and having a hardness substantially the same as the inner cover layer hardness and greater than the outer cover layer hardness; wherein the inner cover comprises a stiff resilient polymer, and the intermediate layer is formed from a thermoset liquid rubber composition comprising a liquid styrenebutadiene rubber, or a liquid ethylene propylene diene monomer (EPDM) polymer.