Thin-layer-covered golf ball with improved velocity
First Claim
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1. 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.
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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.
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Citations
20 Claims
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1. A golf ball comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A golf ball comprising:
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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. - View Dependent Claims (10, 11, 12, 13)
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14. A golf ball comprising:
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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. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification