Elastomeric compositions and methods for making same
First Claim
1. An elastomeric composition comprising a blend or reaction product 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 1 to 19.8 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 mixture 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
28 Claims
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1. An elastomeric composition comprising a blend or reaction product 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 1 to 19.8 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 mixture 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, 16)
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17. A composition comprising a blend or reaction product of:
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a resilient polymer component of at least one of polyisoprene, styrene-butadiene, styrene-propylene-diene rubber (EPDM), and mixtures thereof;
a free-radical initiator; and
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 (18, 19, 20, 21, 22)
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23. A method of preparing an elastomeric composition, comprising the steps of:
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providing a resilient polymer component having a 1,4-cis-content greater than about 50 percent;
providing a free radical initiator;
providing a reinforcing polymer component; and
mixing the resilient polymer component, the free radical initiator, and about 1 to about 19.8 weight percent of the reinforcing polymer component to provide an uncrosslinked mixture with a flexural modulus greater than about 3.5 MPa. - View Dependent Claims (24, 25, 26, 27, 28)
providing a crosslinking agent;
mixing the crosslinking agent with the resilient polymer component, the free radical initiator, and the reinforcing polymer component.
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Specification