Multi-layer cover golf ball having thermoset rubber intermediate cover layer

摘要

A golf ball including a core and a cover including a thermoplastic inner cover layer having a material hardness of 60 to 80 Shore D; a thermoset outer cover layer comprising a castable polyurea and having a material hardness of 20 to 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. The inner cover includes one or more high- or low-acid ionomers and, optionally, a maleic anhydride modified polyolefin. The intermediate layer is formed from a castable liquid polybutadiene rubber.

主权项

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 thermoplastic polyurethane outer cover layer 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 layer comprises one or more low-acid ionomers and the intermediate cover layer is formed from an ethylene propylene diene monomer-based liquid rubber polymer having a viscosity of about 10,000 cp or less.