US2012115641A1PendingUtilityA1

Golf ball compositions

Assignee: COMEAU BRIANPriority: Nov 8, 2010Filed: Dec 31, 2010Published: May 10, 2012

Est. expiryNov 8, 2030(~4.3 yrs left)· nominal 20-yr term from priority

Inventors:Brian Comeau David A. Bulpett Micheal J. Sullivan Mark L. Binette Robert Blink Murali Rajagopalan

A63B 37/00621A63B 37/00622A63B 37/0049A63B 37/0031A63B 37/0037A63B 37/0043

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Claims

Abstract

Disclosed herein are soft and stiff compositions, i.e., compositions which have a flexural modulus that is greater than the value that is expected based on the composition's hardness. The compositions preferably have a hardness/modulus relationship represented by the formula H ≦11.889 Ln( M )+42, where H is the hardness of the composition, in JIS-C, and M is the flexural modulus of the composition, in ksi; or a softness/stiffness relationship represented by the formula if M <56, then H ≦8.5218 Ln( M )+26.5 if M ≧56, then H ≦8.5218 Ln( M )+28.5, where H is the hardness of the composition, in Shore D, and M is the flexural modulus of the composition, in ksi.

Claims

exact text as granted — not AI-modified

1 . A golf ball comprising:
 a core having an outer surface and a geometric center and being formed from a substantially homogeneous formulation; and   a cover layer;   wherein the difference between the Shore C hardness of the outer surface of the core and the Shore C hardness of the center of the core is 8 or less;   and wherein the cover layer is formed from a thermoplastic composition having a JIS-C hardness (H) and a flexural modulus in ksi (M) wherein H≦11.889 Ln(M)+42, and wherein M&gt;6 ksi.   
     
     
         2 . The golf ball of  claim 1 , wherein H≦11.889 Ln(M)+41. 
     
     
         3 . The golf ball of  claim 1 , wherein H≦11.889 Ln(M)+40. 
     
     
         4 . The golf ball of  claim 1 , wherein M&gt;40 ksi. 
     
     
         5 . The golf ball of  claim 4 , wherein H≦9.45 Ln(−0.0105M 2 +3.95M−14)+40. 
     
     
         6 . A golf ball comprising:
 an inner core layer having an outer surface and a geometric center and being formed from a first substantially homogeneous formulation;   an outer core layer having an outer surface and an inner surface and being formed from a second substantially homogeneous formulation; and   a cover layer;   wherein the difference between the Shore C hardness of the outer surface of the inner core layer and the Shore C hardness of the center of the inner core layer is 8 or less;   and wherein the cover layer is formed from a thermoplastic composition having a JIS-C hardness (H) and a flexural modulus in ksi (M) wherein H≦11.889 Ln(M)+42, and wherein M&gt;6 ksi.   
     
     
         7 . The golf ball of  claim 6 , wherein the difference between the Shore C hardness of the outer surface of the outer core layer and the Shore C hardness of the inner surface of the outer core layer is 5 or less. 
     
     
         8 . The golf ball of  claim 6 , wherein H≦11.889 Ln(M)+41. 
     
     
         9 . The golf ball of  claim 6 , wherein H≦11.889 Ln(M)+40. 
     
     
         10 . The golf ball of  claim 6 , wherein M&gt;40 ksi. 
     
     
         11 . The golf ball of  claim 10 , wherein H≦9.45 Ln(−0.0105M 2 +3.95M−14)+40. 
     
     
         12 . A golf ball comprising:
 a core having an outer surface and a geometric center and being formed from a substantially homogeneous formulation;   an intermediate layer; and   a cover layer;   wherein the difference between the Shore C hardness of the outer surface of the core and the Shore C hardness of the center of the core is 8 or less;   and wherein the intermediate layer is formed from a thermoplastic composition having a JIS-C hardness (H) and a flexural modulus in ksi (M) wherein H≦11.889 Ln(M)+42, and wherein M&gt;6 ksi.   
     
     
         13 . The golf ball of  claim 12 , wherein H≦11.889 Ln(M)+41. 
     
     
         14 . The golf ball of  claim 12 , wherein H≦11.889 Ln(M)+40. 
     
     
         15 . The golf ball of  claim 12 , wherein M&gt;40 ksi. 
     
     
         16 . The golf ball of  claim 15 , wherein H≦9.45 Ln(−0.0105M 2 +3.95M−14)+40. 
     
     
         17 . A golf ball comprising:
 an inner core layer having an outer surface and a geometric center and being formed from a first substantially homogeneous formulation;   an outer core layer having an outer surface and an inner surface and being formed from a second substantially homogeneous formulation;   an intermediate layer; and   a cover layer;   wherein the difference between the Shore C hardness of the outer surface of the inner core layer and the Shore C hardness of the center of the inner core layer is 8 or less;   and wherein the intermediate layer is formed from a thermoplastic composition having a JIS-C hardness (H) and a flexural modulus in ksi (M) wherein H≦11.889 Ln(M)+42, and wherein M&gt;6 ksi.   
     
     
         18 . The golf ball of  claim 17 , wherein the difference between the Shore C hardness of the outer surface of the outer core layer and the Shore C hardness of the inner surface of the outer core layer is 8 or less. 
     
     
         19 . The golf ball of  claim 17 , wherein H≦11.889 Ln(M)+41. 
     
     
         20 . The golf ball of  claim 17 , wherein H≦11.889 Ln(M)+40. 
     
     
         21 . The golf ball of  claim 17 , wherein M&gt;40 ksi. 
     
     
         22 . The golf ball of  claim 21 , wherein H≦9.45 Ln(−0.0105M 2 +3.95M−14)+40.

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