Low deformation golf ball

Abstract

A golf ball comprising an innermost core, an outer core, and a cover is disclosed. At least a layer of the golf ball is made from a low compression, high coefficient of restitution material, and is being supported by a low deformation, high compression layer. The resulting golf ball has high coefficient of restitution at high and low impact speeds and low compression for controlled greenside play.

1 . A golf ball comprising:
 an innermost core having a compression of greater than 80, a surface hardness of greater than 70 Shore C, and formed from a first rubber composition, the first rubber composition comprising 50 phr or greater of a co-reaction agent selected from the group consisting of metal salts of diacrylate, dimethacrylate, and monomethacrylate;   an outer core having a compression less than that of the innermost core, a surface hardness of from 25 Shore C to 70 Shore C, and formed from a second rubber composition, the second rubber composition comprising from 5 phr to 30 phr of a co-reaction agent selected from the group consisting of metal salts of diacrylate, dimethacrylate, and monomethacrylate; and   a cover formed from an ionomer composition having a material hardness of from 65 to 80 Shore D and a flexural modulus of from 65,000 psi to 120,000 psi.   
   
   
       2 . The golf ball of  claim 1 , wherein the surface hardness of the outer core is less than 60 Shore C.