Golf balls comprising light stable materials and methods of making the same

A golf ball comprising:

• a core;
• a layer disposed about the core forming a center;
• and
• a cover cast onto the center, wherein the cover comprises a light stable polyurea material consisting essentially of a diisocyanate selected from the group consisting of ethylene diisocyanate;
• propylene-1,2-diisocyanate;
• tetramethylene diisocyanate;
• tetramethylene-1,4-diisocyanate;
• 1,6-hexamethylene-diisocyanate;
• octamethylene diisocyanate;
• decamethylene diisocyanate;
• 2,2,4-trimethylhexamethylene diisocyanate;
• 2,4,4-trimethylhexamethylene diisocyanate;
• dodecane-1,12-diisocyanate;
• dicyclohexylmethane diisocyanate;
• cyclobutane-1,3-diisocyanate;
• cyclohexane-1,2-diisocyanate;
• cyclohexane-1,3-diisocyanate;
• cyclohexane-1,4-diisocyanate;
• methyl-cyclohexylene diisocyanate;
• 2,4-methylcyclohexane diisocyanate;
• 2,6-methylcyclohexane diisocyanate;
• 4,4′-dicyclohexyl diisocyanate;
• 2,4′-dicyclohexyl diisocyanate;
• 1,3,5-cyclohexane triisocyanate;
• isocyanatomethylcyclohexane isocyanate;
• 1-isocyanato-3,3,5-trimethyl-5-isocyanatomethylcyclohexane;
• isocyanatoethylcyclohexane isocyanate;
• bis(isocyanatomethyl)-cyclohexane diisocyanate;
• 4,4′-bis(isocyanatomethyl)dicyclohexane;
• 2,4′-bis(isocyanatomethyl)dicyclohexane;
• isophoronediisocyanate;
• triisocyanate of HDI;
• triisocyanate of 2,2,4-trimethyl-1,6-hexane diisocyanate;
• 4,4′-dicyclohexylmethane diisocyanate;
• 2,4-hexahydrotoluene diisocyanate;
• 2,6-hexahydrotoluene diisocyanate;
• and mixtures thereof, a polyether amine selected from the group consisting of polytetramethylene ether diamines, polyoxypropylene diamines, poly(ethylene oxide capped oxypropylene) ether diamines, triethyleneglycoldiamines, propylene oxide-based triamines, trimethyloipropane-based triamines, glycerin-based triamines, and mixtures thereof, and an amine-terminated curing agent.

A golf ball comprising a cover layer formed from a polyurea composition consisting essentially of:

• a polyurea prepolymer formed from the reaction product of;
• an isocyanate having the structure O═C═N—R—N═C═O, wherein R consists of a cyclic, aromatic, or linear or branched hydrocarbon moiety containing from about 1 to about 20 carbon atoms;
• and
• a polyether amine selected from the group consisting of
• wherein the repeating unit x has a value ranging from about 1 to about 70,
• wherein x and z have combined values from about 3.6 to about 8, y ranges from about 9 to about 50, and wherein R is —(CH2)a— and a ranges from about 1 to about 10,
• H2N—(R)—O—(R)—O—(R)—NH2
• wherein R is —(CH2)a and a ranges from about 1 to about 10, and mixtures thereof;
• and
• an amine-terminated curing agent.