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Low compression, resilient golf balls with rubber core

  • US 6,998,445 B2
  • Filed: 07/09/2002
  • Issued: 02/14/2006
  • Est. Priority Date: 03/26/1998
  • Status: Expired due to Fees
First Claim
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1. 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.

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