Thin-layer-covered golf ball with improved velocity
First Claim
Patent Images
1. A golf ball comprising:
- a core formed of a reaction product comprising;
polybutadiene;
a crosslinking material;
a free radical source;
a cis-to-trans catalyst comprising a metal-containing organosulfur component, wherein the reaction product has a percent change in dynamic stiffness from 0°
C. to −
50°
C. of less than 125 percent;
wherein the organosulfur compound comprises at least one of cadmium, copper, lead, or tellurium;
an inner cover layer disposed about the core having a material hardness of about 60 Shore D to about 65 Shore D; and
an outer cover layer disposed about the inner cover layer comprising a thermoplastic or thermoset polyurethane.
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Abstract
Golf balls including cores formed from polybutadiene reaction products having a percent change in dynamic stiffness from 0° C. to −50° C. of less than 130 percent where the reaction products include a resilient polymer component, a crosslinking material, a cis-to-trans catalyst, and a free radical source. The golf balls may be formed with polyurethane covers, covers formed from castable reactive liquid materials, among other materials. The golf balls may also include an intermediate layer.
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Citations
16 Claims
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1. A golf ball comprising:
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a core formed of a reaction product comprising; polybutadiene; a crosslinking material; a free radical source; a cis-to-trans catalyst comprising a metal-containing organosulfur component, wherein the reaction product has a percent change in dynamic stiffness from 0°
C. to −
50°
C. of less than 125 percent;wherein the organosulfur compound comprises at least one of cadmium, copper, lead, or tellurium; an inner cover layer disposed about the core having a material hardness of about 60 Shore D to about 65 Shore D; and an outer cover layer disposed about the inner cover layer comprising a thermoplastic or thermoset polyurethane. - View Dependent Claims (2, 3, 4, 5)
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6. A golf ball comprising a core formed of a reaction product having a first dynamic stiffness at −
- 50°
C. less than about 130 percent of a second dynamic stiffness at 0°
C., wherein the reaction product comprises;polybutadiene having a molecular weight of greater than about 200,000; a crosslinking material; a free radical source; a cis-to-trans catalyst comprising a metal-containing organosulfur compound; wherein the organosulfur compound comprises at least one of cadmium, copper, lead, or tellurium; and a cover comprising an inner cover layer disposed between the core and an outer cover layer, wherein the inner cover layer comprises a thermoplastic material and has a material hardness of about 60 Shore D to about 65 Shore D, and wherein the outer cover layer comprises polyurethane and has a material hardness of about 30 Shore D to about 60 Shore D. - View Dependent Claims (7, 8, 9, 10)
- 50°
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11. A golf ball comprising:
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a core formed of a reaction product having a first dynamic stiffness at −
50°
C. less than about 130 percent of a second dynamic stiffness at 0°
C., wherein the reaction product comprises;polybutadiene; a crosslinking material; a free radical source; a cis-to-trans catalyst comprising metal; wherein the cis-to-trans catalyst is present in an amount sufficient to produce a reaction product comprising about 32 percent or greater trans-polybutadiene isomer; and a cover comprising a castable reactive liquid material. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification