Polyurea and polyurethane compositions for golf equipment
View Patent ↗Golf equipment having improved cut and shear resistance that includes a polyurea composition, preferably saturated and/or water resistant, formed of a polyurea prepolymer and a curing agent, wherein the polyurea prepolymer includes an isocyanate and an amine-terminated compound, and wherein the curing agent includes a hydroxy-terminated curing agent, amine-terminated curing agent, or a mixture thereof.
1. A golf ball comprising a core and a cover, wherein at least one layer comprises a composition comprising:
a polyurea prepolymer comprising a reaction product of an isocyanate and an amine-terminated component, wherein the amine-terminated component is selected from the group consisting of
wherein x is at least 1, n is from about 1 to 12, and R comprises an alkyl group having from 1 to 20 carbon atoms, a phenyl group, a cyclic group, or a mixture thereof; and
a curative.
2. The golf ball of claim 1 , wherein the curative comprises terminal amino groups.
3. The golf ball of claim 1 , wherein the curative comprises at least one terminal amino group and at least one terminal hydroxyl group.
4. The golf ball of claim 1 , wherein the isocyanate is saturated.
5. The golf ball of claim 1 , wherein R comprises an alkyl group having from 1 to 12 carbon atoms.
6. The golf ball of claim 1 , wherein the curative is saturated.
7. A golf ball comprising a core, an inner cover layer, and an outer cover layer, wherein the outer cover layer is formed of a composition comprising:
a prepolymer, wherein the prepolymer comprises an isocyanate and an amine-terminated component, wherein the amine-terminated component is selected from the group consisting of
wherein x is at least 1, n is from about 1 to 12, and R comprises an alkyl group having from 1 to 20 carbon atoms, a phenyl group, a cyclic group, or a mixture thereof; and
an amine-terminated curing agent.
8. The golf ball of claim 7 , wherein the inner cover layer comprises a thermoplastic material.
9. The golf ball of claim 7 , wherein the thermoplastic material comprises an ionomer resin.
10. The golf ball of claim 7 , wherein at least one of the prepolymer and curing agent is saturated.
11. The golf ball of claim 7 , wherein the isocyanate, amine-terminated component, and curing agent are saturated.
12. A golf ball comprising a core and a cover, wherein at least one layer comprises a composition comprising:
a polyurea prepolymer comprising a reaction product of an aliphatic isocyanate and an aliphatic amine-terminated hydrocarbon; and
an aliphatic curing agent.
13. The golf ball of claim 12 , wherein the at least one layer is a cover layer.
14. The golf ball of claim 12 , wherein the cover comprises an inner cover layer and an outer cover layer, and wherein the outer cover layer comprises the composition.
15. The golf ball of claim 14 , wherein the inner cover layer comprises an ionomer resin.
16. The golf ball of claim 12 , wherein the amine-terminated hydrocarbon is selected from the group consisting of
wherein x is at least 1, n is from about 1 to 12, and R comprises an alkyl group having from 1 to 20 carbon atoms, a cyclic group, or a mixture thereof.
17. The golf ball of claim 12 , wherein the curing agent comprises an amine-terminated curing agent.
18. The golf ball of claim 12 , wherein the curing agent comprises a hydroxy-terminated curing agent.