Polyurethane and polyurea compositions for golf balls with improved stability of the curative blend, wherein the curative blend includes a pigment, a curing agent, and a compatible freezing point depressing agent so that the curative blend has a lower freezing point than the curing agent by itself a
Polyurethane and polyurea compositions for golf balls with improved stability of the curative blend, wherein the curative blend includes a pigment, a curing agent, and a compatible freezing point depressing agent so that the curative blend has a lower freezing point than the curing agent by itself and the blend does not lose pigment dispersion upon solidification and subsequent thawing.
대표청구항▼
What is claimed is: 1. A method of forming a golf ball comprising the steps of: providing a curative blend formed from at least one curing agent, at least one compatible freezing point depressing agent, and at least one grind vehicle comprising a pigment; forming a composition comprising: a prepoly
What is claimed is: 1. A method of forming a golf ball comprising the steps of: providing a curative blend formed from at least one curing agent, at least one compatible freezing point depressing agent, and at least one grind vehicle comprising a pigment; forming a composition comprising: a prepolymer formed from the reaction product of an isocyanate and a polyol or polyamine; and the curative blend; and forming at least a portion of the golf ball from the composition. 2. The method of claim 1, wherein the step of forming at least a portion of the golf ball comprises providing a core and forming a cover from the composition disposed about the core. 3. The method of claim 1, wherein the step of providing a curative blend further comprises mixing a saturated curing agent, at least one compatible saturated freezing point depressing agent, and at least one grind vehicle comprising a pigment to form the curative blend. 4. The method of claim 1, wherein the step of providing a curative blend comprises selecting at least one curing agent having a first freezing point, and wherein the curative blend has a second freezing point that is less than the first freezing point by about 5° F. or greater. 5. The method of claim 4, wherein the second freezing point is less than the first freezing point by about 15° F. or greater. 6. The method of claim 1, wherein the step of providing a curative blend comprises selecting a freezing point depressing agent having a freezing point from about −10° F. to about −100° F. 7. The method of claim 1, wherein the step of providing a curative blend comprises selecting a freezing point depressing agent comprising hydroxy-terminated freezing point depressing agents selected from the group consisting of 1,3-propanediol, 2-methyl-1,3-propanediol, 2-methyl-1,4-butanediol, 1,2-butanediol, 1,3-butanediol, ethylene glycol, diethylene glycol, 1,5-pentanediol, polytetramethylene glycol, propylene glycol, or mixtures there of. 8. A method of forming a golf ball comprising: providing a core; forming a composition comprising: a saturated prepolymer formed from the reaction product of a saturated isocyanate and a saturated polyol, saturated polyamine, or a mixture thereof; and a saturated curative blend formed from at least one saturated curing agent, at least one saturated compatible freezing point depressing agent, and a grind vehicle comprising a pigment; and forming a cover from the composition about the core. 9. The method of claim 8, wherein the composition has a pigment dispersion of about 5 or greater on the Hegman scale. 10. The method of claim 8, wherein the step of forming the cover comprises forming a cover from the composition having a thickness of about 0.02 inches to about 0.035 inches. 11. The method of claim 8, wherein the at least one saturated freezing point depressing agent has a freezing point of about −10° F. to about −120° F. 12. The method of claim 8, wherein the at least one saturated curing agent has a first freezing point and the saturated curative blend has a second freezing point, and wherein the second freezing point is less than the first freezing point by about 10° F. or greater. 13. A method of making a golf ball comprising the steps of: forming a solvent-free pigment dispersion comprising at least one pigment contained in a grind vehicle, a curing agent, and a freezing point depressing agent, wherein the pigment dispersion has a Hegman scale value of greater than about 1 after a freeze/thaw cycle without redispersing the pigment, and wherein the freezing point depressing agent has a freezing point of about −10° F. to about −120° F.; and forming at least one of a cover or core from the solvent-free pigment dispersion. 14. The method of claim 13, wherein the step of forming a solvent-free dispersion comprises selecting a curing agent having a first freezing point and selecting a freezing point depressing agent having a second freezing point less than the first freezing point. 15. The method of claim 14, wherein the step of selecting a freezing point depressing agent comprises selecting the freezing point depressing agent from the group consisting of 1,3-propanediol, 2-methyl-1,3-propanediol, 2-methyl-1,4-butanediol, 1,2-butanediol, 1,3-butanediol, ethylene glycol, diethylene glycol, 1,5-pentanediol, polytetramethylene glycol, propylene glycol, and mixtures thereof. 16. The method golf ball of claim 13, wherein the solvent-free pigment dispersion measures about 5.0 or greater on the Hegman scale. 17. The method of claim 13, wherein the step of forming a solvent-free dispersion further comprises mixing the solvent-free dispersion with a prepolymer formed from the reaction product of an isocyanate and a polyol or a polyamine.
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