Golf ball covers composed of PPDI-based thermoplastic polyurethane
A golf ball comprising a cover composed of a PPDI-based thermoplastic polyurethane material. The phase morphology of the PPDI-based thermoplastic polyurethane material coupled with high levels of hard segment domain cohesion imparts excellent low temperature flexibility, rubber like elasticity, and mechanical properties to the final elastomer.
1. A golf ball comprising:
a core comprising an inner core and an outer core disposed over the inner core, the inner core having a deflection of at least 0.230 inch under a load of 220 pounds, and the core having a deflection ranging from 0.08 inch to 0.150 inch under a load of 220 pounds;
an inner mantle layer disposed over the core, the inner mantle layer having a thickness ranging from 0.025 inch to 0.040 inch, the inner mantle layer composed of an ionomer material, the inner mantle layer material having a plaque Shore D hardness ranging from 65 to 71;
an outer mantle layer disposed over the inner mantle layer, the outer mantle layer material having a plaque Shore D hardness ranging from 36 to 44; and
a cover layer disposed over the outer mantle layer, the cover having a thickness ranging from 0.025 inch to 0.040 inch, the cover composed of a PPDI-based thermoplastic polyurethane material, and the on cover Shore D hardness less than 56.
2. The golf ball according to claim 1 wherein the core is composed of a polybutadiene material, zinc penta chloride, organic peroxide, zinc stearate, zinc diacrylate and zinc oxide.
3. The golf ball according to claim 1 wherein the outer mantle layer is composed of a fully neutralized polymer material.
4. The golf ball according to claim 1 wherein the inner core has a diameter ranging from 0.75 inch to 1.20 inches, and the core has a diameter ranging from 1.25 inch to 1.55 inches.
5. A golf ball comprising:
a core comprising an inner core and an outer core disposed over the inner core, the inner core having a deflection of at least 0.230 inch under a load of 220 pounds, and the core having a deflection ranging from 0.08 inch to 0.150 inch under a load of 220 pounds;
an inner mantle layer disposed over the core, the inner mantle layer having a thickness ranging from 0.025 inch to 0.040 inch;
an outer mantle layer disposed over the inner mantle layer, the outer mantle layer material having a thickness ranging from 0.025 inch to 0.050 inch; and
a cover layer disposed over the outer mantle layer, the cover having a thickness ranging from 0.025 inch to 0.040 inch, the cover composed of a PPDI-based thermoplastic polyurethane material, and the on cover Shore D hardness less than 56;
wherein the golf ball 10 preferably has a diameter of at least 1.68 inches, a mass ranging from 45 grams to 47 grams, a COR of at least 0.79, and a deformation under a 100 kilogram loading of at least 0.07 mm.