Patent ID: 9227368
Filing Date: 2016-01-05
CPC Classification: A63B,B29C,C08F,C08G,C08L

Claim Text:
1. A method of making a golf ball comprising: (a) preparing a thermoplastic polyurethane elastomer having crosslinks in hard segments by reacting (i) an unsaturated diol in which R wherein a free radical initiator induces crosslinking of the allyl group and, if present, the optional unsaturated bond of R wherein the NCO index of the reactants is from about 0.9 to about 1.3 to form a crosslinked, thermoplastic polyurethane elastomer; (b) forming the thermoplastic polyurethane into pellets or chips; (c) molding the pellets or chips to form a cover layer around a ball comprising an inner core layer, an outer core layer substantially surrounding the inner core layer, and an inner cover layer substantially surrounding the outer core layer to form a golf ball, wherein the inner core layer comprises a highly neutralized acid polymer composition that is neutralized to 70% or higher, the outer core layer comprises a polybutadiene rubber; and the inner cover layer comprises a thermoplastic polyurethane.