초록 ▼

A golf ball is formed by molding a center of a homogeneous mass of polybutadiene with a metal salt of an unsaturated acid such as zinc dimethacrylate and a filler such as zinc oxide, and a cover of an ionic copolymer is formed about the center by coating as by electrodeposition or by molding. Moldin

A golf ball is formed by molding a center of a homogeneous mass of polybutadiene with a metal salt of an unsaturated acid such as zinc dimethacrylate and a filler such as zinc oxide, and a cover of an ionic copolymer is formed about the center by coating as by electrodeposition or by molding. Molding of the center can successfully be carried out quickly above 170°C. and the balls can be driven long distances. The centers can be molded with projections which are used for proper centering when molding a cover thereabout.

대표청구항 ▼

A golf ball comprising a center and a cover, said center comprising a substantially spherical homogeneous molded mass of cis-polybutadiene elastomer highly cross-linked in a three dimensional network with long, flexible cross-links formed from zinc dimethacrylate, said zinc dimethacrylate being pres

A golf ball comprising a center and a cover, said center comprising a substantially spherical homogeneous molded mass of cis-polybutadiene elastomer highly cross-linked in a three dimensional network with long, flexible cross-links formed from zinc dimethacrylate, said zinc dimethacrylate being present in about 0.046 to 0.038 equivalents per mole of said elastomer, said cover comprising an ionic copolymer of at least 50 mole percent of ethylene and at least about 0.2 mole percent of an alpha, beta-ethylenically unsaturated carboxylic acid selected from the group consisting of methacrylic acid and ethylene acrylic acid wherein about 20%-90% of the carboxylic acid groups are neutralized with a metal.