Golf ball

Abstract

The present invention provides a golf ball having excellent flyer resistance at a shot on the rough, and having high rebound characteristics and excellent flight performance. The present invention relates to a golf ball comprising a core having a single-layered structure or a multi-layered structure and a cover covering the core, wherein the cover has a complex elastic modulus at −10° C. of 20 to 150 MPa and loss tangent (tan δ) at −10° C. of not less than 0.05, as determined from temperature-dependent curves of the complex elastic modulus and tan δ obtained by dynamic viscoelastic measurement at a frequency of 10 Hz, a dynamic strain of 5% and a heating rate of 4° C./min.

What is claimed is:  
     
         1 . A golf ball comprising a core having a single-layered structure or a multi-layered structure and a cover covering the core, wherein the cover has a complex elastic modulus at −10° C. of 20 to 150 MPa and a loss tangent (tan δ) at −10° C. of not less than 0.05, as determined from temperature-dependent curves of the complex elastic modulus and tan δ obtained by dynamic viscoelastic measurement at a frequency of 10 Hz, a dynamic strain of 5% and a heating rate of 4° C./min.  
     
     
         2 . The golf ball according to  claim 1 , wherein the cover comprises 30% by weight of thermoplastic elastomer in a base polymer.  
     
     
         3 . The golf ball according to  claim 1  or  2 , wherein the cover is formed from materials selected from the group consisting of thermoplastic elastomer, ethylene-methacrylic acid copolymer and mixtures thereof with ionomer resin.