GOLF BALL RESIN COMPOSITION AND GOLF BALL
The present invention provides a golf ball resin composition comprising (A) at least one resin component selected from the group consisting of (a-1) a binary copolymer composed of an olefin and an α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms, (a-2) an ionomer resin consisting of a metal ion-neutralized product of a binary copolymer, (a-3) a ternary copolymer composed of an olefin, an α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms and an α,β-unsaturated carboxylic acid ester, and (a-4) an ionomer resin consisting of a metal ion-neutralized product of a ternary copolymer; and (B) an anionic surfactant containing sulfur. The present invention further provides a golf ball comprising a constituting member formed from the above golf ball resin composition.
1 . A golf ball resin composition comprising
(A) at least one resin component selected from the group consisting of (a-1) a binary copolymer composed of an olefin and an α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms, (a-2) an ionomer resin consisting of a metal ion-neutralized product of a binary copolymer composed of an olefin and an α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms, (a-3) a ternary copolymer composed of an olefin, an α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms and an α,β-unsaturated carboxylic acid ester, and (a-4) an ionomer resin consisting of a metal ion-neutralized product of a ternary copolymer composed of an olefin, an α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms and an α,β-unsaturated carboxylic acid ester; and (B) an anionic surfactant containing sulfur.
2 . The golf ball resin composition according to claim 1 , wherein (B) the anionic surfactant containing sulfur includes sulfate or sulfonate.
3 . The golf ball resin composition according to claim 1 , wherein (B) the anionic surfactant containing sulfur includes a dialkylsulfosuccinic acid and/or a salt thereof.
4 . The golf ball resin composition according to claim 3 , wherein (B) the anionic surfactant containing sulfur is di(2-ethylhexyl)sulfosuccinate.
5 . The golf ball resin composition according to claim 1 , wherein (A) the resin component comprises (a-3) the ternary copolymer composed of the olefin, the α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms and the α,β-unsaturated carboxylic acid ester or (a-4) the ionomer resin consisting of the metal ion-neutralized product of the ternary copolymer composed of the olefin, the α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms and the α,β-unsaturated carboxylic acid ester.
6 . The golf ball resin composition claim 1 , wherein a content of (B) the anionic surfactant containing sulfur ranges from 3 parts to 65 parts by mass with respect to 100 parts by mass of (A) the resin component.
7 . The golf ball resin composition according to claim 1 , further comprising (C) a basic inorganic metal compound in a content of more than 0 part and 10 parts or less with respect to 100 parts by mass of (A) the resin component.
8 . The golf ball resin composition according to claim 1 , having a spin-lattice relaxation time (T1) of 13 C nucleus measured by a high resolution solid state carbon nuclear magnetic resonance (NMR) method of 9.5 seconds or shorter.
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21 . The golf ball resin composition according to claim 1 , characterized in that a storage modulus E′ (Pa) and a loss modulus E″ (Pa) satisfy a following expression;
log( E′/E″ 2 )≧−6.23
when measured at the conditions of a temperature of 12° C., an oscillation frequency of 10 Hz, and a strain of 0.05% in a tensile mode using a dynamic viscoelasticity measuring apparatus.
22 . The golf ball resin composition according to claim 1 , wherein the golf ball resin composition has rebound resilience of 46% or more.
23 . The golf ball resin composition according to claim 1 , wherein the golf ball resin composition has a hardness ranging from 20 to 70 in Shore D hardness.
24 . A golf ball comprising a core composed of at least one layer and a cover covering the core, wherein at least one layer of the core is formed from a golf ball resin composition comprising
(A) at least one resin component selected from the group consisting of (a-1) a binary copolymer composed of an olefin and an α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms, (a-2) an ionomer resin consisting of a metal ion-neutralized product of a binary copolymer composed of an olefin and an α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms, (a-3) a ternary copolymer composed of an olefin, an α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms and an α,β-unsaturated carboxylic acid ester, and (a-4) an ionomer resin consisting of a metal ion-neutralized product of a ternary copolymer composed of an olefin, an α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms and an α,β-unsaturated carboxylic acid ester; and
(B) an anionic surfactant containing sulfur.
25 . The golf ball according to claim 24 , wherein (B) the anionic surfactant containing sulfur includes a dialkylsulfosuccinic acid and/or a salt thereof.
26 . The golf ball according to claim 24 , wherein (B) the anionic surfactant containing sulfur is di(2-ethylhexyl)sulfosuccinate.
27 . The golf ball according to claim 24 , wherein (A) the resin component comprises (a-3) the ternary copolymer composed of the olefin, the α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms and the α,β-unsaturated carboxylic acid ester or (a-4) the ionomer resin consisting of the metal ion-neutralized product of the ternary copolymer composed of the olefin, the α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms and the α,β-unsaturated carboxylic acid ester.
28 . The golf ball according to claim 1 , wherein the golf ball resin composition contains (B) the anionic surfactant containing sulfur in a content ranging from 3 parts to 65 parts and (C) a basic inorganic metal compound in a content of more than 0 part and 10 parts or less with respect to 100 parts of (A) the resin component by mass.
29 . The golf ball according to claim 1 , wherein the golf ball resin composition has rebound resilience of 46% or more and a hardness ranging from 20 to 70 in Shore D hardness.
30 . A one-piece golf ball comprising a golf ball body formed from a golf ball resin composition comprising
(A) at least one resin component selected from the group consisting of (a-1) a binary copolymer composed of an olefin and an α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms, (a-2) an ionomer resin consisting of a metal ion-neutralized product of a binary copolymer composed of an olefin and an 4-unsaturated carboxylic acid having 3 to 8 carbon atoms, (a-3) a ternary copolymer composed of an olefin, an α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms and an α,β-unsaturated carboxylic acid ester, and (a-4) an ionomer resin consisting of a metal ion-neutralized product of a ternary copolymer composed of an olefin, an α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms and an α,β-unsaturated carboxylic acid ester; and
(B) an anionic surfactant containing sulfur.
31 . The one-piece golf ball according to claim 30 , wherein (A) the resin component comprises (a-3) the ternary copolymer composed of the olefin, the α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms and the α,β-unsaturated carboxylic acid ester or (a-4) the ionomer resin consisting of the metal ion-neutralized product of the ternary copolymer composed of the olefin, the α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms and the α,β-unsaturated carboxylic acid ester, and (B) the anionic surfactant containing sulfur includes a dialkylsulfosuccinic acid and/or a salt thereof.
32 . The one-piece golf ball according to claim 31 , wherein (B) the anionic surfactant containing sulfur is di(2-ethylhexyl)sulfosuccinate.
33 . The one-piece golf ball according to claim 30 , wherein the golf ball resin composition contains (B) the anionic surfactant containing sulfur in a content ranging from 3 parts to 65 parts and (C) a basic inorganic metal compound in a content of more than 0 part and 10 parts or less with respect to 100 parts of (A) the resin component by mass.