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US 7,001,954 B2Granted
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
Life of this patent
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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.
Claims20
A golf ball comprising:
- a center comprising:
- a resilient polymer comprising polybutadiene having a molecular weight of greater than about 200,000;
- a crosslinking material present in an amount of about 10 to about 40 parts per hundred of the resilient polymer;
- a free radical source present in an amount of about 0.1 to about 15 parts per hundred of the resilient polymer;
- a cis-to-trans catalyst present in an amount sufficient to produce a center having a first amount of trans-isomer at an interior location and a second amount of trans-isomer at a surface location, wherein the first amount is at least about 6 percent less than the second amount, and wherein the cis-to-trans catalyst comprises a metal organosulfur compound;
- and
- a cover comprising a thermoplastic or thermoset polyurethane.
4 more elements
A golf ball comprising:
- a center comprising:
- a cured resilient polymer component comprising polybutadiene having a molecular weight of greater than about 200,000, wherein the cured resilient polymer component comprises an amount of trans-isomer at least about 32 percent or greater based on the resilient polymer component;
- a crosslinking material present in an amount of about 10 to about 40 parts per hundred of the resilient polymer;
- a free radical source present in an amount of about 0.1 to about 15 parts per hundred of the resilient polymer;
- a cis-to-trans catalyst present in an amount sufficient to produce a center having a first amount of trans-isomer at an interior location and a second amount of trans-isomer at a surface location;
- and
- a cover comprising a thermoplastic or thermoset polyurethane.
4 more elements
A golf ball comprising:
- a center comprising:
- a resilient polymer comprising polybutadiene having a molecular weight of greater than about 250,000;
- a crosslinking material present in an amount of about 10 to about 30 parts per hundred of the resilient polymer;
- a free radical source present in an amount of about 0.2 to about 5 parts per hundred of the resilient polymer;
- a cis-to-trans catalyst present in an amount from about 0.1 to 5 parts per hundred of the resilient polymer, wherein the center has a first amount of trans-isomer at an interior location and a second amount of trans-isomer at a surface location, wherein the first amount is at least about 6 percent less than the second amount, and wherein the resilient polymer comprises at least about 32 percent trans-isomer;
- and
- a cover comprising a castable reactive liquid material.
4 more elements
Dependencies are inferred from the claim text.