Pre-vulcanized or pre-crosslinked materials for golf balls
View Patent ↗The present invention relates to golf ball components and golf balls comprising high levels of pre-vulcanized or pre-crosslinked materials, as well as methods of making same. The pre-vulcanized or pre-crosslinked materials are typically thermoset materials that are fragmented or ground into a powder, exposed to high pressure, high temperature sintering (“HPHTS”) and molded into the desired shape.
1. A golf ball having one or more layers comprising a base rubber material, wherein at least one layer of the golf ball comprises about 125 parts to about 200 parts of one or more pre-vulcanized or pre-crosslinked material per 100 parts of a base rubber material; wherein the pre-vulcanized or pre-crosslinked material is subjected to high pressure, high temperature sintering to form a recrosslinked material.
2. The golf ball of claim 1 , wherein the pre-vulcanized or pre-crosslinked material is a finely ground powder having a particle size of 5 μm to 100 μm.
3. The golf ball of claim 2 , wherein the golf ball comprises about 125 parts to about 150 parts of one or more pre-vulcanized or pre-crosslinked material per 100 parts of base rubber.
4. The golf ball of claim 1 , wherein the at least one layer is a core layer.
5. The golf ball of claim 2 , wherein the pre-vulcanized or pre-crosslinked material is a thermoset material selected from the group consisting of a thermoset natural rubber, thermoset polyurethane, thermoset polyurea, thermoset polyolefin, thermoset phenol-formaldehyde resin, thermoset amino resin, thermoset furan resin, thermoset unsaturated polyester resin, thermoset vinyl ester resin, thermoset cyanate esters, thermoset acrylic resins, thermoset epoxy resin, thermoset polyimides, styrene butadiene rubber, polybutadiene, polyisoprene, trans-isoprene rubber, ethylene propylenediene rubber, fluoroelastomer, silicone rubber, epoxy rubber, nadimide-, cyanate- or maleimide-terminated thermosetting polyimides, and mixtures thereof.
6. The golf ball of claim 1 , wherein the pre-vulcanized or pre-crosslinked material further comprises a cis-to-trans catalyst and free radical source; a crosslinking agent; a vulcanization accelerator; an anti-reversion agent, or a mixture thereof.
7. The golf ball of claim 6 , wherein the anti-reversion agent is 1,3-bis-(citraconimidomethyl)benzene, hexamethylene-1,6-bis(thiosulfate), or a mixture thereof.
8. The golf ball of claim 1 , wherein the golf ball has a coefficient of restitution of at least about 0.7, and wherein the golf ball has an initial velocity of about 245 ft/s or greater.
9. The golf ball of claim 1 , wherein the golf ball has a coefficient of restitution of at least about 0.78.
10. The golf ball of claim 1 , wherein the golf ball has a ball spin rate of about 1200 rpm to about 4000 rpm when the golf ball is hit with a golf driver.
11. The golf ball of claim 1 , wherein the golf ball has a ball spin rate of about 6500 rpm to about 10,000 rpm when the golf ball is hit with an 8-iron.
12. A golf ball having one or more layers consisting essentially of a base rubber and a pre-vulcanized or pre-crosslinked material present in an amount of about 125 parts to about 200 parts by weight per 100 parts of the base rubber, wherein the pre-vulcanized or pre-crosslinked material in the at least one layer is re-crosslinked by high pressure, high temperature sintering, and wherein the pre-vulcanized or pre-crosslinked material is a thermoset material selected from the group consisting of a thermoset natural rubber, thermoset polyurethane, thermoset Polyurea, thermoset polyolefin, thermoset phenol-formaldehyde resin, thermoset amino resin, thermoset furan resin, thermoset unsaturated polyester resin, thermoset vinyl ester resin, thermoset cyanate esters, thermoset acrylic resins, thermoset epoxy resin, thermoset polyimides, styrene butadiene rubber, polybutadiene, polyisoprene, trans-polyisoprene, ethylene propylenediene rubber, fluoroelastomer, epoxy rubber, nadimide-, cyanate- or maleimide-terminated thermosetting polyimides, and mixtures thereof.
13. The golf ball of claim 12 , wherein the one or more layer is a golf ball layer.
14. The golf ball of claim 12 , wherein the golf ball comprises a core and a cover, and wherein the core comprises the pre-vulcanized or pre-crosslinked material.
15. The golf ball of claim 14 , wherein the cover comprises polyurethane, polyurea, or an ionomer.
16. The golf ball of claim 15 , wherein the golf ball further comprises an intermediate layer disposed between the core and the cover, and wherein the intermediate layer comprises an ionomer.
17. A golf ball having one or more layers comprising a base rubber and a pre-vulcanized or pre-crosslinked material, wherein the pre-vulcanized or pre-cross-linked material is present in an amount of about 75 parts to about 200 parts by weight per 100 parts of a base rubber and is subjected to high pressure, high temperature sintering to form a recrosslinked material, and wherein the pre-vulcanized or pre-crosslinked material is a thermoset material selected from the group consisting of a thermoset polyurethane, thermoset polyurea, thermoset polyolefin, thermoset phenol-formaldehyde resin, thermoset amino resin, thermoset furan resin, thermoset unsaturated polyester resin, thermoset vinyl ester resin, thermoset cyanate esters, thermoset acrylic resins, thermoset epoxy resin, thermoset polyimides, nadimide-, cyanate- or maleimide-terminated thermosetting polyimides, and mixtures thereof.
18. The golf ball of claim 17 , wherein said golf ball is a 1-piece ball.
19. The golf ball of claim 17 , wherein said golf ball has an Atti compression of at least about 40, a coefficient of restitution of at least about 0.7, an initial velocity of about 245 ft/s or greater, and a spin rate of about 1200 rpm to about 4000 rpm when the golf ball is hit with a driver.
20. The golf ball of claim 17 , wherein the recrosslinked material has a relative modulus of 1.
21. The golf ball of claim 17 , wherein the recrosslinked material has at least about 75 percent of the properties of the pre-vulcanized or pre-crosslinked material.
22. The golf ball of claim 17 , wherein the pre-vulcanized or pre-crosslinked material is present in an amount of about 125 parts to about 200 parts of one or more per 100 parts of base rubber.
23. The golf ball of claim 17 , wherein the golf ball comprises a core and a cover, and wherein the core comprises the pre-vulcanized or pre-crosslinked material.