Process and composition for making multi-layer golf balls using rigid uncrosslinked shells
First Claim
1. A golf ball comprising:
- a core formed from a composition comprising;
a resilient polymer component of at least one polybutadiene having a high molecular weight average and a 1,4-cis content of greater than about 50 weight percent;
a free-radical initiator; and
an amount of reinforcing polymer component having a sufficiently low viscosity at a mixing temperature to facilitate mixing of the reinforcing polymer component with the resilient polymer component and having a crystalline melting point sufficiently low to facilitate the mixing while avoiding substantial crosslinking, wherein the uncrosslinked composition has a flexural modulus of greater than about 3.5 Mpa; and
a cover formed from a composition comprising at least one ionomer or at least one urethane.
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Accused Products
Abstract
A multi-layer golf ball and methods for preparing a portion thereof including a core having at least one core layer, a mantle having at least one layer including an amount of reinforcing polymer component and a resilient polymer component disposed concentrically adjacent the core, and at least one cover layer disposed concentrically adjacent the mantle, wherein the layer of the mantle is sufficiently rigid to inhibit the resilient polymer component from substantially altering shape prior to crosslinking. The invention also includes an elastomeric composition including a polybutadiene having a high molecular weight average and a predominantly 1,4-cis content, a free-radical initiator, and a reinforcing polymer component having a sufficiently low viscosity at a mixing temperature to permit substantially uniform dispersion of the polymer component with the polybutadiene and having a crystalline melting point sufficiently low to permit mixing while avoiding substantial crosslinking.
45 Citations
24 Claims
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1. A golf ball comprising:
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a core formed from a composition comprising;
a resilient polymer component of at least one polybutadiene having a high molecular weight average and a 1,4-cis content of greater than about 50 weight percent;
a free-radical initiator; and
an amount of reinforcing polymer component having a sufficiently low viscosity at a mixing temperature to facilitate mixing of the reinforcing polymer component with the resilient polymer component and having a crystalline melting point sufficiently low to facilitate the mixing while avoiding substantial crosslinking, wherein the uncrosslinked composition has a flexural modulus of greater than about 3.5 Mpa; and
a cover formed from a composition comprising at least one ionomer or at least one urethane. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A multi-layer golf ball comprising:
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a core having a diameter of about 1.25 inches to about 1.65 inches comprising;
a center; and
a mantle comprising at least one layer, the layer comprising a blend of a reinforcing polymer component and an uncrosslinked resilient polymer component, wherein the mantle is disposed concentrically adjacent the center; and
at least one cover layer disposed concentrically adjacent the mantle and outwardly thereof, wherein the uncrosslinked mantle layer is sufficiently rigid to inhibit the resilient polymer component from substantially altering shape prior to crosslinking. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification