Patent ID: 7148279

Claim:
A golf ball a core and a cover, wherein at least one of the core or the cover comprises a blend of: a highly neutralized jonomer formed from a reaction between an jonomer having acid groups, a suitable cation source, and a salt of an organic acid, the cation source being present in an amount sufficient to neutralized the acid by 80% or greater; and a crosslinked or vulcanized diene rubber blend comprising: a first polybutadiene formed with a cobalt or nickel catalyst having a first Mooney viscosity between 40 to 150; and a second polybutadiene formed with a lanthanide series catalyst having a second Mooney viscosity between 30 to 100, wherein the first Mooney viscosity is greater than the second Mooney viscosity, and wherein the blend has a greater weight percentage of the first polybutadiene than that of the second polybutadiene.