Patent ID: 8530603

Claim:
A golf ball comprising: a core; and a cover covering the core, wherein the cover is formed from a cover composition containing a thermoplastic polyurethane that has, as a constituting component, a chain extender having an unsaturated carbon-carbon bond, wherein the chain extender is at least one selected from the group consisting of ethene diol, propene diol, butene diol, pentene diol, hexene diol, heptene diol, octene diol, nonene diol, decene diol, ethyne diol, propyne diol, butyne diol, pentyne diol, hexyne diol, heptyne diol, octyne diol, nonyne diol, and decyne diol, wherein the thermoplastic polyurethane contains a polyisocyanate component, a high-molecular weight polyol component, and the chain extender component, as the constituting component, and a concentration of the unsaturated carbon-carbon bond in a hard segment component consisting of the polyisocyanate component and the chain extender component falls within a range from 0.2 mole/kg to 1.9 mole/kg, and wherein the thermoplastic polyurethane has a slab hardness ranging from 15 to 50 in Shore D hardness.