Golf ball
The invention provides a golf ball having a core and a cover of one or more layer, wherein at least one layer of the cover is made of a material obtained by molding a mixture composed of (a) 100 parts by weight of a base resin and (b) 1 to 40 parts by weight of a saturated branched-chain fatty acid or a derivative thereof. The golf ball has a soft, pleasant feel on impact and excellent scuff resistance while retaining a good flight performance. Moreover, it exhibits a highly white appearance that undergoes little discoloration.
1. A golf ball comprising a core and a cover of one or more layers, wherein at least one layer of the cover is made of a material obtained by molding a mixture comprising (a) 100 parts by weight of a base resin and (b) 1 to 40 parts by weight of a saturated branched-chain fatty acid,
wherein the base resin (a) is one or more selected from among (a1) to (a4) below:
(a1) an olefin-unsaturated carboxylic acid random copolymer,
(a2) an olefin-unsaturated carboxylic acid-unsaturated carboxylic acid ester random copolymer,
(a3) a metal ion neutralization product of an olefin unsaturated carboxylic acid random copolymer, and
(a4) a metal ion neutralization product of an olefin unsaturated carboxylic acid-unsaturated carboxylic acid ester random copolymer; and
the saturated branched-chain fatty acid is at least one selected from the group consisting of isostearic acid, isoarachidic acid, isopalmitic acid, isomyristic acid and isoheptanoic acid, wherein the isostearic acid has the below structure:
2. The golf ball of claim 1 , wherein the mixture comprising components (a) and (b) additionally includes a basic inorganic metal compound capable of neutralizing acid groups in components (a) and (b).
3. The golf ball of claim 1 , wherein an outermost layer of the cover is made of the material obtained by molding the mixture comprising components (a) and (b).
4. The golf ball of claim 1 , wherein the at least one or more layers making up the cover have a Shore D hardness of from 45 to 59.
5. The golf ball of claim 1 , wherein the at least one or more layers making up the cover have a Shore D hardness of from 51 to 59.
6. A golf ball comprising a core and a cover of one or more layers, wherein at least one layer of the cover is made of a material obtained by molding a mixture comprising (a) 100 parts by weight of a base resin and (b) 1 to 40 parts by weight of a saturated branched-chain fatty acid,
wherein the base resin (a) is (a1) an olefin-unsaturated carboxylic acid random copolymer and/or (a3) a metal ion neutralization product of an olefin-unsaturated carboxylic acid random copolymer; and
the saturated branched-chain fatty acid is at least one selected from the group consisting of isostearic acid, isoarachidic acid, isopalmitic acid, isomyristic acid and isoheptanoic acid, wherein the isostearic acid has the below structure:
7. The golf ball of claim 6 , wherein the mixture comprising components (a) and (b) additionally includes a basic inorganic metal compound capable of neutralizing acid groups in components (a) and (b).
8. The golf ball of claim 6 , wherein an outermost layer of the cover is made of the material obtained by molding the mixture comprising components (a) and (b).
9. The golf ball of claim 6 , wherein the at least one or more layers making up the cover have a Shore D hardness of from 45 to 59.
10. The golf ball of claim 6 , wherein the at least one or more layers making up the cover have a Shore D hardness of from 51 to 59.