| 摘要 |
A golf ball comprising a core, an inner cover layer, and an outer cover layer, the outer cover layer being formed from a polyurea including a caprolactone-free prepolymer of an aliphatic isocyanate mixture comprising dimerized uretdione of HDI and trimerized isocyanurate of HDI (or, optionally, trimerized biuret of HDI) and a first amount of modified polyoxypropylene diamine having a formula: where x=1-70; R1 and R2 each independently=a C1-20 alkyl group, phenyl, or a mixture thereof; and R3-H, CH3, or a mixture thereof; and a curative including a mixture of 3,5-diethyl-2,4-toluenediamine and 3,5-diethyl-2,6-toluenediamine.
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