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Thin-layer-covered golf ball with improved velocity

  • US 7,001,954 B2
  • Filed: 10/29/2003
  • Issued: 02/21/2006
  • Est. Priority Date: 12/24/1998
  • Status: Expired due to Term
First Claim
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1. A golf ball comprising:

  • a center comprising;

    a resilient polymer comprising polybutadiene having a molecular weight of greater than about 200,000;

    a crosslinking material present in an amount of about 10 to about 40 parts per hundred of the resilient polymer;

    a free radical source present in an amount of about 0.1 to about 15 parts per hundred of the resilient polymer;

    a cis-to-trans catalyst present in an amount sufficient to produce a center having a first amount of trans-isomer at an interior location and a second amount of trans-isomer at a surface location, wherein the first amount is at least about 6 percent less than the second amount, and wherein the cis-to-trans catalyst comprises a metal organosulfur compound; and

    a cover comprising a thermoplastic or thermoset polyurethane.

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