Plasticized polyurethanes for use in golf balls

1. A golf ball comprising a core and a cover layer, wherein the core comprises a center and an outer core layer, and wherein at least one of the center or the outer core layer comprises a plasticized polyurethane composition comprising:

at least one polyurethane material and

at least one hydrophobic plasticizer comprising aliphatic esters selected from the group consisting of mono-, di-, or polyester of higher fatty acid having 8 or more carbons with di-, tri-, or polyhydric alcohol, glycerin monostearate, glycerin 12-hydroxy stearate, glycerin distearate, diglycerin monostearate, tetraglycerin monostearate, glycerin monolaurate, diglycerin monolaurate, tetraglycerin monolaurate, polypropylene adipate, diisodecyl adipatey bis(2-methylhexyl)adipate, dicapryl adipate, diisooctyl adipate, octyldecyl adipate, isooctylisodecyl adipate, dibutyl fumarate, dioctylfumarate, triethyl citrate, acetyltriethyl citrate, tributyl citrate, and acetyltributyl citrate;

and wherein the composition further comprises synthetic polyisoprene, natural polyisoprene, polybutadiene, butyl rubber, polynorbornene, ethylene-propylene diene monomer rubber, or styrene-butadiene rubber, combined with high levels of oils, plasticizers, fillers, and mixtures thereof.

2. A golf ball comprising a core and a cover layer, wherein the core comprises a center and an outer core layer, and wherein at least one of the center or the outer core layer comprises a plasticized polyurethane composition comprising at least one polyurethane material and at least one hydrophobic plasticizer comprising aliphatic esters selected from the group consisting of mono-, di-, or polyester of higher fatty acid having 8 or more carbons with di-, hi-, or polyhydric alcohol, glycerin monostearate, glycerin 12-hydroxy stearate, glycerin distearate, diglycerin monostearate, tetraglycerin monostearate, glycerin monolaurate, diglycerin monolaurate, tetraglycerin monolaurate, polypropylene adipate, diisodecyl adipate, bis(2-methylhexyl)adipate, dicapryl adipate, diisooctyl adipate, octyldecyl adipate, isooctylisodecyl adipate, dibutyl fumarate, dioctylfumarate, triethyl citrate, acetyltriethyl citrate, tributyl citrate, and acetyltributyl citrate;

and wherein the cover comprises an inner cover layer and an outer cover layer, and wherein at least one of the inner or outer cover layers comprises a plasticized polyurethane.

3. A golf ball comprising a core and a cover layer, wherein the core comprises a center and an outer core layer, and wherein at least one of the center or the outer core layer comprises a plasticized polyurethane composition comprising at least one polyurethane material and at least one hydrophobic plasticizer comprising aliphatic esters selected from the group consisting of mono-, di-, or polyester of higher fatty acid having 8 or more carbons with di-, tri-, or polyhydric alcohol, glycerin monostearate, glycerin 12-hydroxy stearate, glycerin distearate, diglycerin monostearate, tetraglycerin monostearate, glycerin monolaurate, diglycerin monolaurate, tetraglycerin monolaurate, polypropylene adipate, diisodecyl adipate, bis(2-methylhexyl)adipate, dicapryl adipate, diisooctyl adipate, octyldecyl adipate, isooctylisodecyl adipate, dibutyl fumarate, dioctylfumarate, triethyl citrate, acetyltriethyl citrate, tributyl citrate, and acetyltributyl citrate;

and wherein the cover comprises an inner cover layer and an outer cover layer, and wherein at least one of the inner or outer cover layers comprises a plasticized polyurethane, and wherein at least one of the inner or outer cover layer has a thickness of less than about 0.05 inches.