Dual core golf ball compositions

A multi-layer golf ball comprising:

• a center comprising a first resilient polymer component, a first crosslinking agent, and a first filler present in an amount from about 5 to 80 parts per hundred of the polymer;
• a mantle having at least one layer disposed concentrically about the center, which layer comprises a second resilient polymer component, a reinforcing polymer component, a second crosslinking agent present in an amount from about 36 to 50 parts per hundred of the polymer, and a second filler present in an amount from about 1 to 20 parts per hundred of the polymer, wherein the mantle layer is sufficiently rigid prior to crosslinking to inhibit the second resilient polymer component in the mantle from substantially altering shape and wherein the mantle layer has a lower density than the center and further wherein the uncrosslinked mantle layer has a flexural modulus of greater than about 3.5 MPa;
• and
• a cover having at least one layer disposed concentrically about the mantle.

A golf ball comprising:

• a center comprising cis-polybutadiene polymer having a molecular weight average from about 200,000 to 500,000 to impart resilience, an acrylate crosslinking agent present in an amount from greater than 17 to about 27 parts per hundred of the polymer, and filler present in an amount from about 30 to 60 parts per hundred of the polymer;
• a mantle disposed concentrically about the center comprising from about 10 to 30 parts trans-polyisoprene polymer and 70 to 90 parts of cis-polybutadiene polymer, an acrylate crosslinking agent present in an amount from about 36 to 45 parts per hundred of the total polymer in the mantle, and filler present in an amount from about 3 to 10 parts per hundred of the total polymer in the mantle, wherein the mantle layer is sufficiently rigid prior to crosslinking to inhibit the cis-polybutadiene polymer in the mantle from substantially altering shape;
• and
• a cover having at least one layer disposed concentrically about the mantle.

A multi-layer golf ball comprising:

• a golf ball core having a moment of inertia which comprises a center having a first Shore D hardness comprising a first resilient polymer component, a first crosslinking agent, and a first filler present in an amount from about 5 to 80 parts per hundred of the polymer;
• and a mantle having a second Shore D hardness and having at least one layer disposed concentrically about the center, which layer comprises a second resilient polymer component, a reinforcing polymer component, a second crosslinking agent present in an amount from about 36 to 50 parts per hundred of the polymer, and a second filler present in an amount from about 1 to 20 parts per hundred of the polymer, wherein the mantle layer is sufficiently rigid prior to crosslinking to inhibit the second resilient polymer component in the mantle from substantially altering shape and wherein the mantle layer has a lower density than the center;
• and
• a cover having at least one layer disposed concentrically about the mantle, wherein the moment of inertia of the core divided by the value of the first Shore D hardness divided by the second Shore D hardness is greater than about 65 g•cm2.