Low compression, resilient golf balls with rubber core
AssigneeAcushnet Company
InventorsDerek A. Ladd, Laurent C. Bissonnette, David A. Bulpett, Murali Rajagopalan
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Abstract
A low compression, resilient golf ball having a center including a material formed from the conversion reaction of sufficient amounts of polybutadiene, a free radical source, and a cis-to-trans catalyst to convert a portion of cis-isomer to trans-isomer in the polybutadiene, wherein said material has an amount of trans-isomer greater than the amount of trans-isomer present before the conversion reaction, and wherein the reaction product is susbstantially free of antioxidant.
Claims21
A golf ball having a cover and a core, wherein the core comprises a material formed from the conversion reaction of polybutadiene, a free radical source comprising a single peroxide, and a cis-to-trans catalyst comprising zinc pentachlorothiophenol, wherein the conversion reaction occurs at a sufficient temperature to form a polybutadiene reaction product comprising:
- a second amount of trans-isomer content greater than the first amount of trans-isomer content, wherein the material has a free radical source to antioxidant ratio of about 25 or greater, wherein the cis-to-trans catalyst is present in an amount of about 2.2 parts per hundred or greater, and wherein a first hardness measured at an interior location in the core differs from a second hardness measured at an exterior surface on the core by at least about 10 percent wherein the golf ball has a coefficient of restitution of about 0.81 or greater.
A golf ball having a cover and a core,
- wherein the core comprises a material formed from the conversion reaction of polybutadiene, a free radical source comprising a single peroxide, and a cis-to-trans catalyst comprising zinc pentachlorothiophenol present in an amount of about 2.2 parts per hundred or greater, wherein the conversion reaction occurs at a sufficient temperature to form a polybutadiene reaction product comprising a second amount of trans-isomer content greater than the first amount of trans-isomer content, wherein the material has a free radical source to antioxidant ratio of about 25 or greater, wherein the reaction product has a first hardness measured at an interior location in the core that differs from a second hardness measured at an exterior surface on the core by at least about 10 percents
- wherein the cover comprises an inner cover and an outer cover, wherein at least one of the inner and outer cover has a thickness of 0.02 to 0.04 inches, and
- wherein the golf ball has a coefficient of restitution of about 0.81 or greater.
Dependencies are inferred from the claim text.