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Multi-layer core golf ball

  • US 10,080,925 B2
  • Filed: 02/17/2017
  • Issued: 09/25/2018
  • Est. Priority Date: 01/10/2008
  • Status: Active Grant
First Claim
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1. A golf ball comprising:

  • an inner core layer having a diameter of from 0.500 inches to 1.580 inches and formed from a first thermoset rubber composition;

    at least one outer core layer having a thickness of from 0.005 inches to 0.300 inches and a surface hardness of from 50 Shore C to 90 Shore C and formed from a highly neutralized polymer composition, wherein the highly neutralized polymer composition comprises;

    an acid copolymer of ethylene and an α



    -unsaturated carboxylic acid;

    a non-acid polymer selected from ethylene-alkyl acrylates and ethylene-alkyl methacrylates and present in an amount of greater than 50 wt %, based on the combined weight of the acid copolymer and the non-acid polymer;

    an organic acid or salt thereof; and

    a cation source present in an amount sufficient to neutralize greater than 80% of all acid groups present in the composition; and

    a cover.

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