US 6,982,301 B1
Golf ball cores comprising blends of polybutadiene rubbers
Peter R. Voorheis, Fall River, Mass. (US); Samuel A. Pasqua, Jr., Tiverton, R.I. (US); Michael J. Sullivan, Barrington, R.I. (US); David A. Bulpett, Boston, Mass. (US); and Derek A. Ladd, Fairhaven, Mass. (US)
Assigned to Acushnet Company, Fairhaven, Mass. (US)
Filed on Aug. 12, 2003, as Appl. No. 10/639,116.
Application 10/639116 is a division of application No. 10/164809, filed on Jun. 07, 2002, granted, now 6,774,187.
This patent is subject to a terminal disclaimer.
Int. Cl. A63B 37/06 (2006.01); C08L 9/00 (2006.01)
U.S. Cl. 525—193 19 Claims
 
1. A golf ball comprising a solid core and a cover disposed about the core, wherein the core is formed from a polybutadiene blend comprising:
a) a first polybutadiene formed with a cobalt or nickel catalyst having a first Mooney viscosity between about 50 and about 150; and
b) a second polybutadiene formed with a lanthanide series catalyst having a second Mooney viscosity between about 30 and about 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, and wherein the core comprises a reactive co-agent in an amount less than about 5 phr by weight of the polybutadiene blend.