abstract |
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: n n nwhere x=1-70; R 1 and R 2 each independently=a C 1-20 alkyl group, phenyl, or a mixture thereof; and R 3 ═H, CH 3 , or a mixture thereof; and a curative including a mixture of 3,5-diethyl-2,4-toluenediamine and 3,5-diethyl-2,6-toluenediamine. |