Elastomeric compositions and multi-layer golf balls prepared with rigid uncrosslinked shells
First Claim
1. An elastomeric composition comprising a blend of:
- 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
about 5 to 15 weight percent of a 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.
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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.
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Citations
20 Claims
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1. An elastomeric composition comprising a blend of:
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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
about 5 to 15 weight percent of a 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A composition comprising a blend of:
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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, wherein the reinforcing polymer component comprises a block copolymer ether/ester, an acrylic polyol, a trans-polybutadiene, a 1,2-polybutadiene, an ethylene-vinyl acetate copolymer, a polyethylene or copolymer thereof, or a cyclooctene. - View Dependent Claims (17, 18, 19, 20)
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Specification