Use of nucleating agents to increase the flexural modulus of ionomers

1. A golf ball comprising a core, a cover layer, and optionally at least one intermediate layer disposed between the core and the cover layer, wherein at least one portion of the ball comprises an ionomer composition modified with a nucleating agent, and wherein the nucleating agent is a sorbitol derivative.

2. The golf ball of claim 1 , wherein the ionomer composition comprises at least two ionomers.

3. The golf ball of claim 1 , wherein the nucleating agent is in a powder form.

4. The golf ball of claim 1 , wherein the ionomer composition is partially or fully neutralized with metal ions.

5. The golf ball of claim 4 , wherein the metal ions comprise Zn, Na, Li, K, Ca, Mg, Ni, Mn, Cu, Ti, Al, or a combination thereof.

6. The golf ball of claim 1 , wherein the nucleating agent is capable of increasing the flexural modulus of the ionomer composition.

7. The golf ball of claim 1 , wherein the sorbitol derivative is selected from the group consisting of bis (benzylidene) and bis (alkylbenzilidine) sorbitols, wherein the alkyl group of alkylbenzilidine includes from 2 to 18 carbon atoms.

8. The golf ball of claim 1 , wherein the sorbitol derivative is selected from the group consisting of 1,3,2,4-dibenzylidene sorbitol, 1,3,2,4-di-para-methylbenzylidene sorbitol, 1,3,2,4-di-para-methylben-zylidene sorbitol, and combinations thereof.