A golf ball comprising a core and a cover, wherein the core or the cover comprises a thermoplastic or thermoset composition comprising a polyurea prepolymer formed from a reactant A comprising an isocyanate; and a reactant B comprising a polyether polyamine having a repeating branched oxyalkylene monomer unit, or a polymerized polyamine formed from a chiral diol or a chiral cyclic ether.

 
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