Patent ID: 7244384

Claim:
A method of preparing a golf ball having a urethane cover comprising the steps of: providing two matingly engageable separate mold halves, comprising a first mold half and a second mold half, wherein at least one mold cavity is situated within a face of each mold half, wherein the mold cavity is shaped to form a golf ball cover; filling the at least one mold cavity in the first mold half and at least one mold cavity in the second mold half with a mixture comprising a diisocyanate selected from the group consisting of Toluene Diisocyanate, 4,4′-Diphenylmethane Diisocyanate; Isophorone Diisocyanate and mixtures thereof, a polyol comprising Polytetramethylene Glycol and a curing agent comprising Dimethylthio-2,4-toluenediamine and Diethyl-2,4-toluenediamine, wherein the diisocyanate and the polyol are mixed with the curing agent forming the mixture via a mixhead wherein the mixture has a potlife of approximately 20-70 seconds, wherein curing of the mixture is uninterrupted; securing a core to a core loading apparatus; lowering the core into the mixture situated in the at least one cavity of the first mold half so that one half of the core is submerged in the mixture; releasing the core from a core holding apparatus; mating the first mold half with the second mold half; securing the first mold half to the second mold half such that a second half of the core is submerged in the mixture situated in the at least one cavity of the second mold half; curing the mixture into a polyurethane; releasing the first mold half from the second mold half; removing a golf ball comprising the core and a cover, the cover comprised of polyurethane formed from the mixture.