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US 6,486,261 B1Granted
Thin-layer-covered golf ball with improved velocity
AssigneeAcushnet Company
InventorsShenshen Wu, Edmund A. Hebert, Laurent Bissonnette, David A. Bulpett, Murali Rajagopalan, Peter Voorheis, Mark N. Wrigley
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Abstract
A golf ball comprising a center comprising a polybutadiene having a molecular weight of greater than 200,000 and a resilience index of at least about 40; and a cover layer comprising a polyurethane composition formed from a prepolymer having no greater than 7.5 percent by weight unreacted isocyanate groups.
Claims50
A golf ball comprising:
- a center comprising a material formed from a conversion reaction of polybutadiene having a first amount of trans-isomer, a free radical source, and at least one cis-to-trans catalyst, wherein the material has a molecular weight of greater than about 200,000 and a resilience index of at least about 40;
- and
- a cover layer comprising a polyurethane composition formed from a prepolymer having no greater than 7.5 percent by weight unreacted isocyanate groups.
A golf ball comprising:
- a center comprising a material formed from a conversion reaction of polybutadiene having a first amount of trans-isomer, a free radical source, and at least one cis-to-trans catalyst, wherein the material has a molecular weight of greater than about 300,000 and a resilience index of at least about 40;
- a outer core layer surrounding the center, the outer core layer having an outer diameter of at least about 1.51 inches;
- an inner cover layer surrounding the outer core layer;
- and
- an outer cover layer disposed about the inner cover layer, the outer cover layer comprising a polyurethane composition formed from a prepolymer having less than 7.5 percent by weight unreacted isocyanate groups.
2 more elements
Dependencies are inferred from the claim text.