GOLF BALLS HAVING A MULTI-LAYERED CORE WITH A THERMOSET RUBBER CENTER
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United States of America Patent
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Issued Date -
Jan 18, 2018
app pub date -
Aug 30, 2017
filing date -
Nov 28, 2001
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Abstract
Golf balls having a multi-layered solid core and multi-layered cover are provided. The center of the core is made of a thermoset rubber material and preferably has a positive hardness gradient. The intermediate core layer is made of a thermoset or thermoplastic composition. The outer core layer is made of a highly neutralized polymer composition. The inner cover is made of a thermoplastic composition, preferably an ethylene acid copolymer. The thermoplastic ethylene acid copolymer ionomer can have acid groups that are partially or highly neutralized. The outer cover is made of a composition comprising a polyurethane, polyurea, or copolymer or blend thereof. The finished ball has high resiliency and rebounding properties.
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