Golf ball resin composition and golf ball
View Patent ↗A golf ball resin composition that is excellent in resilience includes (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) a basic metal salt of a fatty acid.
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) a basic metal salt of a fatty acid,
wherein the golf ball resin composition contains (B) the basic metal salt of the fatty acid in an amount ranging from 25 parts by mass to 100 parts by mass with respect to 100 parts by mass of (A) the resin component, and
wherein (B) the basic metal salt of the fatty acid is represented by a following general formula (1):
m M 1 O.M 2 (RCOO) 2 (1)
wherein m ranges from 0.5 to 2.0, RCOO represents a residue of the fatty acid, and M 1 and M 2 are metals of Group II or Group XII of the periodic table, respectively.
2. The golf ball resin composition according to claim 1 , wherein (B) the basic metal salt of the fatty acid is a basic metal salt of a fatty acid having 8 to 30 carbon atoms.
3. The golf ball resin composition according to claim 1 , wherein the golf ball resin composition contains (B) the basic metal salt of the fatty acid in an amount ranging from 25 parts to 70 parts by mass with respect to 100 parts by mass of (A) the resin component.
4. The golf ball resin composition according to claim 1 , wherein (B) the basic metal salt of the fatty acid includes at least one component selected from the group consisting of lauric acid, stearic acid, behenic acid, oleic acid, and erucic acid as a fatty acid component.
5. The golf ball resin composition according to claim 1 , wherein the metal component of (B) the basic metal salt of the fatty acid includes magnesium, calcium, zinc or barium.
6. The golf ball resin composition according to claim 1 , wherein M 1 and M 2 are magnesium.
7. The golf ball resin composition according to claim 1 , wherein the golf ball resin composition has a rebound resilience of 40% or more.
8. The golf ball resin composition according to claim 1 , wherein the golf ball resin composition has a slab hardness ranging from 20 to 80 in Shore D hardness.
9. A golf ball comprising a core, at least one intermediate layer disposed around the core, and a cover disposed around the intermediate layer, wherein at least one intermediate layer 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) a basic metal salt of a fatty acid,
wherein the golf ball resin composition contains (B) the basic metal salt of the fatty acid in an amount ranging from 25 parts by mass to 100 parts by mass with respect to 100 parts by mass of (A) the resin component, and
wherein (B) the basic metal salt of the fatty acid is represented by a following general formula (1):
m M 1 O.M 2 (RCOO) 2 (1)
wherein m ranges from 0.5 to 2.0, RCOO represents a residue of the fatty acid, and M 1 and M 2 are metals of Group II or Group XII of the periodic table, respectively.
10. The golf ball according to claim 9 , wherein (B) the basic metal salt of the fatty acid is a basic metal salt of a fatty acid having 8 to 30 carbon atoms.
11. The golf ball according to claim 9 , wherein the golf ball resin composition contains (B) the basic metal salt of the fatty acid in an amount ranging from 25 parts to 70 parts by mass with respect to 100 parts by mass of (A) the resin component.
12. The golf ball according to claim 9 , wherein (B) the basic metal salt of the fatty acid includes at least one component selected from the group consisting of lauric acid, stearic acid, behenic acid, oleic acid, and erucic acid as a fatty acid component.
13. The golf ball according to claim 9 , wherein the metal component of (B) the basic metal salt of the fatty acid includes magnesium, calcium, zinc or barium.
14. The golf ball according to claim 9 , wherein M 1 and M 2 are magnesium.
15. The golf ball according to claim 9 , wherein the golf ball resin composition has a rebound resilience of 40% or more.
16. The golf ball according to claim 9 , wherein the golf ball resin composition has a slab hardness ranging from 20 to 80 in Shore D hardness.
17. The golf ball according to claim 9 , wherein the intermediate layer has a thickness ranging from 0.5 mm to 15 mm.
18. The golf ball according to claim 9 , wherein the core is formed from a rubber composition.