Highly-neutralized ethylene copolymers and their use in golf balls

摘要

Provided are thermoplastic compositions having tailored PGA compression and optionally low moisture sensitivity. The thermoplastic compositions may be used in golf balls and golf ball components. The thermoplastic compositions comprise melt-processible, highly-neutralized ethylene acid copolymers and one or more aliphatic, mono-functional organic acids, in which greater than 50 mol % of all the acid groups in the ethylene acid copolymer and in the organic acid or acids are neutralized. Thermoplastic compositions comprising at least 30 equivalent % Zn²⁺ or Ca²⁺ as counterions exhibit surprising resistance to moisture absorption.