Golf ball cover compositions and golf balls
AssigneeBridgestone Sports Co., Ltd.
InventorsRinya Takesue, Yasushi Ichikawa, Shunichi Kashiwagi
Life of this patent
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Abstract
An ionomer resin component containing (a) a ternary ionomer resin and optionally (b) a binary ionomer resin, optionally blended with (c) a non-neutralized olefin-unsaturated carboxylic acid random copolymer, is blended with (d) a metal soap of a fatty acid neutralized with a Ca, Mg or Zn cation in a weight ratio from 95:5 to 80:20. A golf ball cover composition based on this mixture has a melt index of 1-10 dg/sec. The cover composition is drastically improved in moldability, resilience and paint coating adhesion. A golf ball having a cover made of the composition is improved in feel and flight performance.
Claims24
A golf ball cover composition primarily comprising a mixture of a base resin comprising
- an ionomer resin component containing (a) a ternary ionomer resin in the form of a metal ion neutralized product of an olefin-unsaturated carboxylic acid-unsaturated carboxylate copolymer having an acid content of up to 12% by weight and (b) a binary ionomer resin in the form of a metal ion neutralized product of an olefin-unsaturated carboxylic acid copolymer, and
- (c) a non-neutralized random copolymer formed from olefin and unsaturated carboxylic acid monomers,
- (d) a metal soap obtained by neutralizing an organic acid having up to 29 carbon atoms with a monovalent to trivalent metal ion, the weight ratio of the base resin to the metal soap being from 95:5 to 80:20, said composition having a melt index of at least 1 dg/sec.
A golf ball cover composition primarily comprising a mixture of a base resin comprising
- an ionomer resin component containing (a) a ternary ionomer resin in the form of a metal ion neutralized product of an olefin-unsaturated carboxylic acid-unsaturated carboxylate copolymer having an acid content of up to 12% by weight and (b) a binary ionomer resin in the form of a metal ion neutralized product of an olefin-unsaturated carboxylic acid copolymer, and
- (d) a metal soap obtained by neutralizing an organic acid having up to 29 carbon atoms with a monovalent to trivalent metal ion, the weight ratio of the base resin to the metal soap being from 95:5 to 80:20, said composition having a melt index of at least 1 dg/sec.
A golf ball cover composition primarily comprising a mixture of a base resin comprising
- an ionomer resin component containing (a) a ternary ionomer resin in the form of a metal ion neutralized product of an olefin-unsaturated carboxylic acid-unsaturated carboxylate copolymer having an acid content of up to 12% by weight and (c) a non-neutralized random copolymer formed from olefin and unsaturated carboxylic acid monomers, and
- (d) a metal soap obtained by neutralizing an organic acid having up to 29 carbon atoms with a monovalent to trivalent metal ion, the weight ratio of the base resin to the metal soap being from 95:5 to 80:20, said composition having a melt index of at least 1 dg/sec.
Dependencies are inferred from the claim text.