Golf ball

Abstract

The present invention is a golf ball having a core and a cover. The core has a diameter of 1.53 inches to 1.55 inches, and a PGA compression of 60 to 75 points. The cover has a thickness of 0.60 inch to 0.90 inch. The cover has a Shore D hardness less than 58 as measured on the land surface of the golf ball. The golf ball has a has a COR that is greater than 0.782 points at 143 feet per second.

We claim as our invention:  
     
         1 . A golf ball comprising: 
 a core having a diameter of 1.50 inches to 1.56 inches, the core comprising polybutadiene, zinc oxide in an amount of 7 to 15 parts per hundred parts of polybutadiene, zinc diacryalate in an amount of 20 to 50 parts per hundred parts of polybutadiene; an initiator in an amount of 0.1 to 1.0 parts per hundred parts of polybutadiene, and tungsten in an amount of 5 to 10 parts per hundred parts of polybutadiene, the core having a PGA compression of 55 to 70 points; and    a cover having a thickness of 0.60 inch to 0.90 inch, the cover comprising an ionomer blend formed from a high acid ionomer resin neutralized with zinc in a range of 20 to 40 weight percent of the ionomer blend, and a terpolymer neutralized with magnesium in a range of 80 to 60 weight percent of the ionomer blend, and a Shore D hardness ranging from 52 to 58; 
 wherein the golf ball has a PGA compression ranging from 80 to 95 points and a COR at 143 feet per second of 78.2 to 80.5.  
   
     
     
         2 . A golf ball comprising: 
 a core having a diameter of 1.50 inches to 1.56 inches, the core having a PGA compression of 55 to 70 points; and    a cover having a thickness of 0.60 inch to 0.90 inch, the cover having a Shore D hardness less than 58 as measured on the land surface of the golf ball; 
 wherein the golf ball has COR at 143 feet per second of 78.2 to 80.5.  
   
     
     
         3 . A golf ball comprising: 
 a core having a diameter of 1.53 inches to 1.55 inches, the core having a PGA compression of 60 to 75 points; and    a cover composed of an ionomer blend formed from a high acid ionomer resin neutralized with zinc in a range of 20 to 40 weight percent of the ionomer blend, and a terpolymer neutralized with magnesium in a range of 80 to 60 weight percent of the ionomer blend, the cover having a thickness of 0.60 inch to 0.90 inch, the cover having a Shore D hardness less than 58 as measured on the land surface of the golf ball; 
 wherein the golf ball has COR at 143 feet per second of 78.2 to 80.5.  
   
     
     
         4 . A golf ball comprising: 
 a core having a diameter of 1.53 inches to 1.55 inches, the core having a PGA compression of 60 to 75 points; and    a cover composed of an ionomer blend formed from a high acid ionomer resin neutralized with zinc in a range of 20 to 40 weight percent of the ionomer blend, and a terpolymer neutralized with magnesium in a range of 80 to 60 weight percent of the ionomer blend, the cover having a thickness of 0.60 inch to 0.90 inch, the cover having a Shore D hardness less than 58 as measured on the land surface of the golf ball; 
 wherein the golf ball has a COR that is greater than 0.790 points at 143 feet per second, and a true spin greater than 5200 rotations per minute off a sand wedge at a swing speed of 50 miles per hour.