Golf ball

Abstract

A one-piece solid golf ball including a matrix containing one or more rubber components in which butadiene rubber is a predominant component, and pulverized rubber obtained by pulverizing a one-piece solid golf ball predominantly containing butadiene rubber, wherein the pulverized rubber is incorporated in amount of 1-30 parts by mass on the basis of 100 parts by mass of the rubber components of the matrix. Also disclosed is a multi-piece golf ball including a core and one or more cover layers, the core including a matrix and pulverized rubber obtained by pulverizing a one-piece solid golf ball, the matrix containing one or more rubber components, wherein the pulverized rubber is incorporated in amount of 1-30 parts by mass on the basis of 100 parts by mass of the rubber components of the matrix.

What is claimed is:  
     
         1 . A one-piece solid golf ball comprising a matrix containing one or more rubber components in which butadiene rubber is a predominant component, and pulverized rubber obtained by pulverizing a one-piece solid golf ball predominantly containing butadiene rubber, wherein the pulverized rubber is incorporated in amount of 1-30 parts by mass on the basis of 100 parts by mass of the rubber components of the matrix.  
     
     
         2 . A one-piece solid golf ball according to  claim 1 , wherein the butadiene rubber is 1,4-cis-polybutadiene.  
     
     
         3 . A one-piece solid golf ball according to  claim 1 , wherein the pulverized rubber is incorporated in an amount of 5-20 parts by mass on the basis of 100 parts by mass of the rubber components of the matrix.  
     
     
         4 . A one-piece solid golf ball according to  claim 1 , wherein the pulverized rubber comprises rubber particles having an average size of more than 0.80 mm and rubber particles having an average size of 0.80 mm or less, in an amount of about 30% and in an amount of about 70%, respectively.  
     
     
         5 . A multi-piece golf ball comprising a core and one or more cover layers, the core comprising a matrix and pulverized rubber obtained by pulverizing a one-piece solid golf ball, the matrix containing one or more rubber components, wherein the pulverized rubber is incorporated in an amount of 1-30 parts by mass on the basis of 100 parts by mass of the rubber components of the matrix.  
     
     
         6 . A multi-piece golf ball according to  claim 5 , wherein the matrix of the core predominantly contains butadiene rubber, such as 1,4-cis-polybutadiene, which is cross-linked by use of a cross-linking agent predominantly containing zinc acrylate.  
     
     
         7 . A multi-piece golf ball according to  claim 5 , wherein the one-piece solid golf ball from which the pulverized rubber is obtained predominantly contains butadiene rubber, such as 1,4-cis-polybutadiene, which is cross-linked by use of a cross-linking agent predominantly containing methacrylic acid and zinc.  
     
     
         8 . A multi-piece golf ball according to  claim 5 , wherein the pulverized rubber is incorporated in an amount of 5-20 parts by mass on the basis of 100 parts by mass of the rubber components of the matrix.  
     
     
         9 . A multi-piece golf ball according to  claim 5 , wherein the pulverized rubber comprises rubber particles having an average size of more than 0.80 mm and rubber particles having an average size of 0.80 mm or less, in an amount of about 30% and in an amount of about 70%, respectively.