GOLF BALL COMPOSITIONS
Disclosed herein are hard and flexible compositions, i.e., compositions which have a flexural modulus that is less 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 )+47, 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 <110, then H ≧8.5218 Ln( M )+ 32.5 if M≧110, then H≧72.5, where H is the hardness of the composition, in Shore D, and M is the flexural modulus of the composition, in ksi.
1 . A golf ball comprising at least one layer formed from a polymer blend composition having a JIS-C hardness (H) and a flexural modulus in ksi (M) wherein H≧11.889 Ln(M)+47.
2 . The golf ball of claim 1 , wherein H≧11.889 Ln(M)+48.
3 . The golf ball of claim 1 , wherein H≧11.889 Ln(M)+49.
4 . The golf ball of claim 1 , wherein H≧65.
5 . The golf ball of claim 1 , wherein H≧70.
6 . The golf ball of claim 1 , wherein H≧75.
7 . The golf ball of claim 1 , wherein H≧80.
8 . The golf ball of claim 1 , wherein the polymer blend composition comprises an ionomer.
9 . A polymer blend composition having a JIS-C hardness (H) and a flexural modulus in ksi (M) wherein H≧11.889 Ln(M)+47.
10 . The polymer blend composition of claim 9 , wherein H≧11.889 Ln(M)+48.
11 . The polymer blend composition of claim 9 , wherein H≧11.889 Ln(M)+49.
12 . The polymer blend composition of claim 9 , wherein H≧65.
13 . The polymer blend composition of claim 9 , wherein H≧70.
14 . The polymer blend composition of claim 9 , wherein H≧75.
15 . The polymer blend composition of claim 9 , wherein H≧80.
16 . The polymer blend composition of claim 9 , wherein the polymer blend composition comprises an ionomer.
17 . A golf ball comprising at least one layer formed from an ionomer composition having a JIS-C hardness (H) and a flexural modulus in ksi (M) wherein H≧11.889 Ln(M)+47.
18 . The golf ball of claim 17 , wherein H≧11.889 Ln(M)+48.
19 . The golf ball of claim 17 , wherein H≧11.889 Ln(M)+49.
20 . The golf ball of claim 17 , wherein H≧65.
21 . The golf ball of claim 17 , wherein H≧70.
22 . The golf ball of claim 17 , wherein H≧75.
23 . The golf ball of claim 17 , wherein H≧80.
24 . An ionomer composition having a JIS-C hardness (H) and a flexural modulus in ksi (M) wherein H≧11.889 Ln(M)+47.
25 . The ionomer composition of claim 24 , wherein H≧11.889 Ln(M)+48.
26 . The ionomer composition of claim 24 , wherein H≧11.889 Ln(M)+49.
27 . The ionomer composition of claim 24 , wherein H≧65.
28 . The ionomer composition of claim 24 , wherein H≧70.
29 . The ionomer composition of claim 24 , wherein H≧75.
30 . The ionomer composition of claim 24 , wherein H≧80.