Graphene Core For A Golf Ball With A Soft Cover

Abstract

A golf ball with a core comprising polybutadiene and graphene, and a soft cover is disclosed herein. The golf ball has a dual core with an outer core comprising polybutadiene and graphene. The soft cover is preferably composed of a highly neutralized polymer, a first ionomer, a second ionomer, and an impact modifier.

We claim as our invention the following: 
     
         1 . A golf ball comprising:
 a core comprising a polybutadiene material; and   a cover layer disposed over the outer core, the cover layer comprising 30 to 40 wt % of a highly neutralized polymer, 10 to 20 wt % of a first ionomer, 10 to 20 wt % of a second ionomer, 15 to 25 wt % of a masterbatch comprising from 20 to 50 wt % of an impact modifier, and 5 to 15 wt % of a color masterbatch;   wherein the golf ball has a diameter of at least 1.68 inches, a mass lower than 45.93 grams, and a COR of at least 0.790.   
     
     
         2 . The golf ball according to  claim 1  wherein the impact modifier is at least one of acrylonitrile-butadiene-styrene polymer (ABS), methyl methacrylate-butadiene-styrene polymer (MBS) impact-property modifiers for poly(vinyl chloride), and acrylic/methacrylic core-shell modifiers for polycarbonate. 
     
     
         3 . The golf ball according to  claim 1  wherein the cover layer has a Shore D hardness ranging from 35 to 60. 
     
     
         4 . The golf ball according to  claim 1  wherein the outer core has a tensile modulus ranging from 8 MPa to 10 MPa.