Golf ball with very low compression and high cor

Abstract

A golf ball having a very low compression and a high COR is disclosed herein. The core preferably comprises a single neodymium-catalyzed polybutadiene, and has a diameter ranging from 1.575 inch to 1.62 inch with a compression ranging from 20 to 45. The cover preferably has a thickness ranging from 0.038 inch to 0.045 inch, and a Shore D hardness ranging from 50 to 58. The golf ball preferably has a coefficient of restitution of at least 0.780, and a compression ranging from 35 to 50.

1 . A golf ball comprising:
 a core having a mass ranging from 38 grams to 42 grams, a diameter ranging from 1.575 inch to 1.62 inch, and a compression ranging from 20 to 45 as measured on an INSTRON machine using a load of 200 pounds;   a cover disposed on the core, the cover composed of a material comprising at least one ionomer, the cover having a thickness ranging from 0.038 inch to 0.050 inch, the cover material having a Shore D hardness ranging from 50 to 62;   wherein the golf ball has a diameter of at least 1.68 inches, a mass of at least 45 grams;   wherein the golf ball has a coefficient of restitution greater than a value COR B , wherein COR B =0.785+0.00075(COMP B ), wherein COMP B  is the compression of the golf ball as measured on an INSTRON machine using a load of 200 pounds, and wherein COR B  is the PTM coefficient of restitution measured at a ball speed of 125 feet per second.   
   
   
       2 . The golf ball according to  claim 1  wherein the core has a diameter of 1.59 inches. 
   
   
       3 . The golf ball according to  claim 1  wherein the core has a compression ranging from 20 to 30. 
   
   
       4 . The golf ball according to  claim 1  wherein the cover material has a Shore D hardness of 59. 
   
   
       5 . A golf ball comprising:
 a core having a mass ranging from 38 grams to 42 grams, a diameter ranging from 1.575 inch to 1.62 inch, and a compression ranging from 20 to 45 as measured on an INSTRON machine using a load of 200 pounds;   a cover disposed on the core, the cover composed of a material comprising at least one ionomer, the cover having a thickness ranging from 0.038 inch to 0.050 inch, the cover material having a Shore D hardness ranging from 50 to 62;   wherein the golf ball has a diameter of at least 1.68 inches, a mass of at least 45 grams;   wherein the golf ball has a coefficient of restitution greater than a value COR B , wherein COR B =0.780+0.00075(COMP B ), wherein COMP B  is the compression of the golf ball as measured on an INSTRON machine using a load of 200 pounds, and wherein COR B  is the PTM coefficient of restitution measured at a ball speed of 125 feet per second.   
   
   
       6 . The golf ball according to  claim 5  wherein the core has a diameter of 1.59 inches. 
   
   
       7 . The golf ball according to  claim 5  wherein the core has a compression ranging from 20 to 30. 
   
   
       8 . The golf ball according to  claim 5  wherein the cover material has a Shore D hardness of 59. 
   
   
       9 . The golf ball according to  claim 5  wherein the core comprises a single neodymium-catalyzed polybutadiene, zinc diacrylate ranging from 10 to 20 weight percent of the core, zinc oxide ranging from 10 to 17 weight percent of the core, zinc stearate in an amount of 3 to 8 weight percent of the core and zinc pentachlorophenyl in an amount of 0.25 to 1.0 weight percent of the core. 
   
   
       10 . A golf ball comprising:
 a core having a mass ranging from 38 grams to 42 grams, a diameter ranging from 1.575 inch to 1.62 inch, and a compression ranging from 20 to 45 as measured on an INSTRON machine using a load of 200 pounds;   a cover disposed on the core, the cover composed of a material comprising at least one ionomer, the cover having a thickness ranging from 0.038 inch to 0.050 inch, the cover material having a Shore D hardness ranging from 50 to 62;   wherein the golf ball has a diameter of at least 1.68 inches, a mass of at least 45 grams;   wherein the golf ball has a coefficient of restitution greater than a value COR B , wherein COR B =0.775+0.00075(COMP B ), wherein COMP B  is the compression of the golf ball as measured on an INSTRON machine using a load of 200 pounds, and wherein COR B  is the PTM coefficient of restitution measured at a ball speed of 125 feet per second.   
   
   
       11 . The golf ball according to  claim 10  wherein the core has a diameter of 1.59 inches. 
   
   
       12 . The golf ball according to  claim 10  wherein the core has a compression ranging from 20 to 30. 
   
   
       13 . The golf ball according to  claim 10  wherein the cover material has a Shore D hardness ranging from 54 to 59. 
   
   
       14 . The golf ball according to  claim 10  wherein the core comprises a single neodymium-catalyzed polybutadiene, zinc diacrylate ranging from 10 to 20 weight percent of the core, zinc oxide ranging from 10 to 17 weight percent of the core, zinc stearate in an amount of 3 to 8 weight percent of the core and zinc pentachlorophenyl in an amount of 0.25 to 1.0 weight percent of the core.