A golf ball which has excellent abrasion-resistance and spin performance is provided. The golf ball of the present invention includes a core and a cover covering the core. The cover contains, as a resin component, polyurethane which is obtained using, as a polyisocyanate component constituting the polyurethane, 4,4′-dicyclohexylmethane diisocyanate having a mole ratio ((B)/(A)) of non-cis-structure molecule (B) to cis-structure molecule (A) in a range from 3/7 to 9/1.
1. A golf ball comprising:
a core;
a cover covering the core and containing polyurethane as a resin component,
wherein the polyurethane comprises 4,4′-dicyclohexylmethane diisocyanate having a molar ratio ((B)/(A)) of non-cis-structure molecule (B) to cis-structure molecule (A) in a range from 3/7 to 6/4 as a polyisocyanate component constituting the polyurethane; and
polyol having a molecular weight of 800 or less as a chain extender component constituting the polyurethane.
2. The golf ball according to claim 1 , wherein the polyurethane is obtained using 4,4′-dicyclohexylmethane diisocyanate having a mole ratio ((B)/(A)) of non-cis-structure molecule (B) to cis-structure molecule (A) in a range from 5/5 to 6/4 as the polyisocyanate component constituting the polyurethane.
3. The golf ball according to claim 1 , wherein the polyisocyanate component contains the 4,4′-dicyclohexylmethane diisocyanate in an amount of 5 mass % or higher.
4. The golf ball according to claim 1 , wherein the polyisocyanate component contains the 4,4′-dicyclohexylmethane diisocyanate in an amount of 50 mass % or higher.
5. The golf ball according to claim 1 , wherein the polyisocyanate component essentially consists of the 4,4′-dicyclohexylmethane diisocyanate.
6. The golf ball according to claim 1 , wherein the polyurethane contains polytetramethylene ether glycol having a number average molecular weight of from 400 to 10,000 as a polyol component constituting the polyurethane.
7. The golf ball according to claim 1 , wherein the polyurethane contains 1,4-butanediol as a chain extender component constituting the polyurethane.
8. A golf ball comprising:
a core;
a cover covering the core and containing polyurethane as a resin component,
wherein the polyurethane comprises
4,4′-dicyclohexylmethane diisocyanate having a molar ratio ((B)/(A)) of non-cis-structure molecule (B) to cis-structure molecule (A) in a range from 3/7 to 6/4 as a polyisocyanate component constituting the polyurethane,
polytetramethylene ether glycol as a polyol component constituting the polyurethane; and
polyol having a molecular weight of 800 or less as a chain extender component constituting the polyurethane.
9. The golf ball according to claim 8 , wherein the polyurethane is obtained using 4,4′-dicyclohexylmethane diisocyanate having a mole ratio ((B)/(A)) of non-cis-structure molecule (B) to cis-structure molecule (A) in a range from 5/5 to 6/4 as the polyisocyanate component constituting the polyurethane.
10. The golf ball according to claim 9 , wherein the polyisocyanate component contains the 4,4′-dicyclohexylmethane diisocyanate in an amount of 5 mass % or higher.
11. The golf ball according to claim 9 , wherein the polyisocyanate component contains the 4,4′-dicyclohexylmethane diisocyanate in an amount of 50 mass % or higher.
12. The golf ball according to claim 9 , wherein the polyisocyanate component essentially consists of the 4,4′-dicyclohexylmethane diisocyanate.
13. The golf ball according to claim 12 , wherein the polyurethane contains 1,4-butanediol as a chain extender component constituting the polyurethane.