Patent ID: 8022141
Filing Date: 2011-09-20
Classification: A63B,B32B,C08G,C08L,C09D

Abstract:
1. A method of manufacturing a golf ball composed of a core and a cover having a plurality of layers that encloses the core, at least a first layer of the cover being formed primarily of a heated mixture of: (A) 60 to 90 wt % of a metal ion neutralization product of an olefin-unsaturated carboxylic acid copolymer and/or a metal ion neutralization product of an olefin-unsaturated carboxylic acid-unsaturated carboxylic acid ester copolymer (40 to 80 wt % of component A being an ionomer neutralized with alkali metal ions), (B) 5 to 20 wt % of at least one type of olefin-unsaturated carboxylic acid copolymer and/or olefin-unsaturated carboxylic acid-unsaturated carboxylic acid ester copolymer having the same unsaturated carboxylic acid content as component A, and (C) 2 to 30 wt % of a thermoplastic polyurethane elastomer, the method being comprised of pre-mixing component B and component C, and subsequently adding component A and forming the mixture into the layer of the golf ball.