The present invention provides a golf ball having excellent shot feel, controllability, rebound characteristics, scuff resistance, yellowing resistance and productivity. The present invention relates to a golf ball comprising a core and a cover covering the core, wherein the cover comprises polyurethane-based thermoplastic elastomer formed by using cycloaliphatic diisocyanate as a base resin.
1. A golf ball comprising
a core and
a cover covering the core,
wherein the core is formed from a rubber composition comprising cis-1,4-polybutadiene and
the cover, having a thickness of 0.5 to 1.5 mm and a hardness in Shore D of 33 to 52, comprises polyurethane-based thermoplastic elastomer formed by using nonionic cycloaliphatic diisocyanate in the backbone structure of the polyurethane molecule as a base resin selected from the group consisting of 4,4′-dicyclohexylmethane diisocyanate, 1,3-bis (isocyanatomethyl)cyclohexane, isophorone diisocyanate, and trans-1,4cyclohexane diisocyanate;
and the core has a deformation amount of 2.5 to 4.5 mm, when applying from an initial load of 98 N to a final load of 1275 N on the core, and
the golf ball has a deformation amount of 2.4 to 4.0 mm, when applying from an initial load of 98 N to a final load of 1275 N on the golf ball.
2. The golf ball of claim 1 , wherein the core deformation amount is 2.6 to 4.2 mm.
3. The golf ball of claim 1 , wherein the core deformation amount is 2.7 to 4.0 mm.
4. The golf ball of claim 1 , wherein the thermoplastic elastomer is formed by using 4,4′-dicyclohexylmethane diisocyanate.
5. The golf ball of claim 1 , wherein the cover further comprises another thermoplastic elastomer or ionomer resin in an amount of 0 to 40 parts by weight based on 100 parts by weight of the whole resin for the cover.
6. The golf ball of claim 1 , wherein the deformation amount for the golf ball is 2.5 to 3.7 mm.
7. The golf ball of claim 1 , wherein the deformation amount for the golf ball is 2.6 to 3.4 mm.