GOLF BALL

摘要

A method for manufacturing a golf ball showing a great flight distance on driver shots for includes the steps of: preparing a rubber composition containing a base rubber, an α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms and/or a metal salt thereof as a co-crosslinking agent, a crosslinking initiator and a carboxylic acid and/or a salt thereof; heat pressing the rubber composition at a press temperature ranging from t-40° C. to t-15° C. to mold a spherical core, wherein t ° C. is a one-minute half-life temperature of the crosslinking initiator; and forming at least one cover layer covering the spherical core.

主权项

1. A golf ball comprising a spherical core and at least one cover layer covering the spherical core, wherein the spherical core is formed from a rubber composition containing (a) a base rubber, (b) an α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms and/or a metal salt thereof as a co-crosslinking agent, (c) a crosslinking initiator, (d1) a salt of a carboxylic acid having 1 to 4 carbon atoms, or an aromatic carboxylic acid and/or a salt thereof, and (d2) at least one compound selected from the group consisting of an aliphatic carboxylic acid having 5 or more carbon atoms, a salt of an aliphatic carboxylic acid having 5 or more carbon atoms, thiobenzoic acids, salts of thiobenzoic acids, a mercaptocarboxylic acid derivative and a dithiodicarboxylic acid derivative.