| 主权项 |
1. A golf ball comprising:
a golf ball precursor, the precursor comprising at least one preselected golf ball layer but not an outer cover layer, and an outer cover layer that: (1) comprises a moisture-cured, crosslinked, thermoplastic polyurethane elastomer formed by reacting a mixture of (a) an unsaturated diol having two primary hydroxyl groups and at least one allyl ether group of the formulain which R1 is a substituted or unsubstituted alkyl group, substituted or unsubstituted aryl group, substituted or unsubstituted alkyl-aryl group, substituted or unsubstituted ether group, substituted or unsubstituted ester group, a combination of these, or H, and optionally includes an unsaturated bond in any main chain or side chain of any group; R2 comprises an allyl group optionally attached by a substituted or unsubstituted alkylene group, substituted or unsubstituted arylene group, substituted or unsubstituted alkylarylene group, substituted or unsubstituted ether group, or substituted or unsubstituted ester group; and x and y are integers independently having a value from 1 to 10, (b) a polyisocyanate, (c) a polyol having a molecular weight between about 500 and about 4000, and—optionally (d) a chain extender having at least two isocyanate-reactive sites and a molecular weight less than about 450; wherein a free radical initiator induces crosslinking of the allyl group and, if present, the optional unsaturated bond of R1, the mixture having an NCO index of from about 1.06 to about 1.18;and
(2) has a 100% modulus of from about 80 to about 130 kg/cm2. |
