Patent ID: 6613842
Filing Date: 2003-09-02
Classification: A63B,C08L,Y10T

Abstract:
A golf ball comprising a core and a cover, the cover having a thickness of less than about 0.08 inches, the core having a compression of less than about 90 and is formed from a composition comprising a base rubber, a metal salt acrylate or diacrylate, an initiator, a highly-neutralized polymer, and at least one of a low modulus ionomer or an acid terpolymer of the formula: the low modulus iononmer or acid terpolymer having a dynamic shear storage modulus at 23Â° C. of at least about 104 dynes/cm2 and a loss tangent of no more than about 1 at a frequency of about 1 Hz, wherein R1, R2, and R3 are hydrogen or CH3; R4 is linear or branched alkyl of formula CnH2n+1, where n is an integer; M+ is H+, Li+, Zn2+, Ca2+, Ti2+, Mg2âˆ’, Na+, W3+, or Zi2+; and x ranges from about 20 to about 85 weight percent of the polymer, y ranges from about 1 to about 50 weight percent of the polymer, and z ranges from about 1 to about 30 weight percent of the polymer; wherein the low modulus ionomer or acid terpolymer is present in an amount sufficient to improve the durability of the core.