US2015367180A1PendingUtilityA1

Low compression golf ball

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Assignee: ACUSHNET COPriority: Jun 18, 2014Filed: Jun 18, 2014Published: Dec 24, 2015
Est. expiryJun 18, 2034(~7.9 yrs left)· nominal 20-yr term from priority
Inventors:John D. FarrellMatthew F. HoggeNicholas M. Nardacci
A63B 37/0089A63B 2037/0079A63B 37/0065A63B 37/0024A63B 37/0077A63B 37/0031A63B 37/0009A63B 37/0096A63B 37/0074A63B 37/0063A63B 37/0087
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Claims

Abstract

Disclosed herein are two-layer, low compression golf balls including a low compression rubber core and a single cover layer.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A two-layer golf ball consisting essentially of:
 a core having a compression of less than 20 and formed from a polybutadiene blend composition, the polybutadiene blend composition comprising a first polybutadiene and a second polybutadiene; and   a cover layer formed from a thermoplastic composition;   wherein the golf ball has a compression of from 25 to 55.   
     
     
         2 . The two-layer golf ball of  claim 1 , wherein the cover layer has a Shore D hardness of greater than 58. 
     
     
         3 . The two-layer golf ball of  claim 1 , wherein the cover layer has a Shore D hardness of greater than 60. 
     
     
         4 . The two-layer golf ball of  claim 1 , wherein the compression of the golf ball is from 30 to 50. 
     
     
         5 . The two-layer golf ball of  claim 1 , wherein the compression of the golf ball is from 40 to 45. 
     
     
         6 . The two-layer golf ball of  claim 1 , wherein the core has a positive hardness gradient wherein the center hardness of the core is at least 10 Shore C units less than the outer surface hardness of the core. 
     
     
         7 . The two-layer golf ball of  claim 6 , wherein the center hardness of the core is at least 15 Shore C units less than the outer surface hardness of the core. 
     
     
         8 . The two-layer golf ball of  claim 1 , wherein the cover layer composition is formed from a composition comprising a first ionomer and a second ionomer. 
     
     
         9 . The two-layer golf ball of  claim 8 , wherein the first ionomer is a partially neutralized ethylene-methacrylic acid copolymer. 
     
     
         10 . The two-layer golf ball of  claim 1 , wherein the golf ball has an aerodynamic coefficient magnitude of from 0.25 to 0.28 and an aerodynamic force angle of from 34° to 46° at a Reynolds Number of 230000 and a spin ratio of 0.080, and wherein the golf ball has an aerodynamic coefficient magnitude of from 0.26 to 0.29 and an aerodynamic force angle of from 36° to 48° at a Reynolds Number of 208000 and a spin ratio of 0.090. 
     
     
         11 . The two-layer golf ball of  claim 1 , wherein the golf ball has an aerodynamic coefficient magnitude of from 0.26 to 0.30 and an aerodynamic force angle of from 38° to 50° at a Reynolds Number of 190000 and a spin ratio of 0.100. 
     
     
         12 . The two-layer golf ball of  claim 1 , wherein the golf ball has an aerodynamic coefficient magnitude of from 0.27 to 0.32 and an aerodynamic force angle of from 40° to 55° at a Reynolds Number of 170000 and a spin ratio of 0.110. 
     
     
         13 . The two-layer golf ball of  claim 10 , wherein the golf ball comprises a plurality of dimples on the outer surface thereof, and wherein the dimples are arranged in a tetrahedron-based dimple pattern. 
     
     
         14 . The two-layer golf ball of  claim 13 , wherein at least 80% of the dimples have an edge angle of 14°. 
     
     
         15 . A two-layer golf ball consisting essentially of:
 a core having a center hardness of 70 Shore C or less, an outer surface hardness of 80 Shore C or less, and formed from a polybutadiene blend composition, the polybutadiene blend composition comprising a first polybutadiene and a second polybutadiene; and   a cover layer formed from a thermoplastic composition;   wherein the golf ball has a compression of from 25 to 55; and   wherein the center hardness of the core is at least 10 Shore C units less than the outer surface hardness of the core.   
     
     
         16 . The two-layer golf ball of  claim 15 , wherein the center hardness of the core is at least 15 Shore C units less than the outer surface hardness of the core. 
     
     
         17 . The two-layer golf ball of  claim 15 , wherein the center hardness of the core is at least 20 Shore C units less than the outer surface hardness of the core. 
     
     
         18 . The two-layer golf ball of  claim 15 , wherein the cover layer has a Shore D hardness of 60 or greater. 
     
     
         19 . The two-layer golf ball of  claim 15 , wherein the compression of the core is less than 20. 
     
     
         20 . The two-layer golf ball of  claim 15 , wherein the compression of the golf ball is from 40 to 45.

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