Abstract: The present invention provides a hollow, solid golf ball having improved shot feel at the time of hitting by improving the impact absorption, while maintaining excellent flight performance. The present invention relates to a hollow, solid golf ball comprising a hollow core and a cover formed on the core, wherein the hollow core is composed of a hollow portion having a diameter of 5 to 23 mm and a hollow core outer layer, and the hollow core outer layer has an elastic modulus of 265 to 985 kgf/cm.sup.2.

Abstract: A golf ball having a dimpled surface is coated with a paint layer having a constant film thickness even at the edges of the dimples wherein the paint layer comprises a polyurethane and/or epoxy resin, and 0.1 to 3% by weight based on the paint resin solids content of silica, clay, calcium carbonate or a mixture thereof optionally surface-treated with a silane coupling agent, silicone oil, fatty acid, organic acid salt or ammonium salt.

Abstract: The present invention provides a hollow golf ball having a spherical cavity in the center, which exhibits excellent durability and less impact strength to result in excellent shot feel without degrading flight performance, and the production of the same. The hollow golf ball includes: (a) hollow center formed from a material selected from the group consisting of rubber, thermoplastic resin and a mixture thereof, the hollow center having a hollow portion with a diameter of 5 to 30 mm; (b) at least one core rubber layer, formed on said hollow center, the core rubber layer being obtained by vulcanizing a rubber composition which comprises a base rubber, a metal salt of an unsaturated carboxylic acid, an organic peroxide and filler; and (c) a cover formed on said core rubber layer.

Abstract: The present invention provides a coated golf ball which suppresses sagging of the paint at the dimple edge after coating, maintains original flying characteristics which the dimple shape possesses, and provides excellent coating appearance. The coated golf ball of the present invention comprises a golf ball body and a paint layer formed thereon, wherein said paint layer is formed from a paint which comprises internally-crosslinked polymer gel fine particles dispersed therein.

Abstract: Disclosed is a golf ball comprising a core 1 composed of a center 1a and an outer shell 1b, and a cover 2 covering said core 1, wherein a specific gravity of said center 1a is 0.2 to 1. The golf ball has excellent flying distance and satisfies other performances of golf balls.

Abstract: Disclosed is a coated golf ball having a constant film thickness even at the edge part of the dimple.The coated golf ball is obtained by coating a paint on a golf ball having dimples on the surface. The paint is an polyurethane paint and/or epoxy resin paint and contains silica, clay, calcium carbonate or a mixture thereof in an amount of 0.1 to 3% by weight based on 100 parts by weight of the paint resin solid content.

Abstract: A golf ball has a surface uniformly covered with a paint coat so that carrying properties of dimples can be stably elicited. A paint to which is applied a voltage of more than 50,000 V is supplied to a disk revolving at a speed of more than 15,000 rpm for atomization, the atomized paint being coated on the surface of the golf ball to form a paint coat within a thickness range of 5 to 60 .mu.m, with a maximum/minimum coat thickness ratio of 1 to 2.

Abstract: A golf ball has a surface uniformly covered with a paint coat so that carrying properties of dimples can be stably elicited. A paint to which is applied a voltage of more than 50,000 V is supplied to a disk revolving at a speed of more than 15,000 rpm for atomization, the atomized paint being coated on the surface of the golf ball to form a paint coat within a thickness range of 5 to 60 .mu.m, with a maximum/minimum coat thickness ratio of 1 to 2.

Abstract: A coated golf ball comprising a core, a cover layer covering said core and a white paint layer coated on said cover wherein said cover is mainly composed of trans-polyisoprene, said paint layer comprises one or more white coating layers and clear coating layers, a white paint for forming said white paint layer contains 20 to 70% by weight of a white pigment and 0.005 to 0.10% by weight of a blue pigment based on a solid content of the white paint, and said blue pigment is selected from the group consisting of .di-elect cons.-phthalocyanine blue and indanthrone blue.

Abstract: The present invention provides a coated golf ball wherein the whitening of the color tone is enhanced and weathering properties are improved. The golf ball body having a cover mainly composed of an ionomer resin is coated with a white paint. The paint layer of the coated golf ball comprises at least one white paint layer and at least one clear paint layer. The white paint comprises 3 to 15% by weight of a white pigment, 0.0005 to 0.0250% by weight of a blue pigment and 0.001 to 0.010% by weight of a red pigment, based on 100% by weight of the solid content of the coating. The weight ratio of the blue pigment to the red pigment is 0.1 to 2.0.

Abstract: Disclosed is a method for coating a golf ball, wherein the coating efficiency of the paint is high and a uniform coating can be formed. According to the method, the paint is sprayed on a golf ball moving with rotation on the circumference of a circle having a diameter of 0.5 to 1.5 m from a disc charged with 60,000 to 130,000 V, which is rotating at 20,000 to 40,000 rpm and is inclined or moving in the vertical direction, or a paint is sprayed in a direction at an angle of 45.degree. or less to the horizontal direction from a disc charged with the above voltage, which is rotating at the above number of revolutions, to coat the golf ball so that a ratio of the maximum film thickness to the minimum film thickness may be 1.5 or less after one round of coating.

Abstract: The present invention provides a coated golf ball having beautiful appearance, wherein the whiteness thereof is enhanced by inhibiting the enhancement of blueness. The golf ball body of the coated golf ball is coated with a white paint containing titanium oxide as a main pigment. The white paint comprises 45 to 60% by weight of titanium oxide, 0.005 to 0.20% by weight of a blue pigment and 0.001 to 0.06% by weight of a red pigment, based on 100% by weight of a solid content of a coating. The weight ratio of the blue pigment to the red pigment is 0.9 to 5.

Abstract: A reclaimed golf ball having approximately the same flying properties (e.g. flying distance, rolling, ballistic height, etc.) as those of a new golf ball, the reclaimed golf ball being obtained by grinding the dimpled surface of a one-piece solid golf ball until the dimples on the surface are substantially removed, and then forming a dimpled coating layer of a rubber or an ionomer resin on the ground exterior surface.

Abstract: A golf ball has one great circle and four one-half great circles which all intersect no dimples. Eight end points which include two end points of each one-half great circle are formed at the one great circle. These end points do not coincide with each other on the great circle. One of the one-half great circles intersects the other one-half great circle at a right angle at the middle point thereof on each of the great circle. In other words, an upper semispherical mold for an octahedral dimple golf ball arrangement is rotated a certain angle relative to the lower mold such that two of the three great circles are divided into four one-half great circles. The parting line of the mold becomes the one remaining great circle. In this manner, a more uniform flight of the golf ball canbe obtained regardless of whether the ball is hit on a seam, semi-seam of non-seam area.

Abstract: A one-piece golf ball exhibiting an increased flying distance and a high durability suitable for golf driving ranges, i.e. a solid golf ball having a central hardness (JIS-C hardness) of 60 to 75, a hardness at a position 10 mm from the center of 72 to 80 and a surface hardness of 70 to 85, whereby the central hardness is minimum, and the difference between the maximum hardness and the minimum hardness is 15 or less, said golf ball being obtained by vulcanizing and molding a rubber composition comprising(a) 100 parts by weight of polybutadiene rubber, mainly comprising high-cis-polybutadiene rubber containing the cis-1,4-structure in a quantity of at least 96% and having a Mooney viscosity of 48 to 85 synthesized by the use of a nickel-containing catalyst;(b) 0.1 to 2.0 parts by weight of 2,5-di-t-butylhydroquinone as a vulcanization stabilizer;(c) 10 to 50 parts by weight of unsaturated carboxylic acids and/or salts thereof; and(d) 0.5 to 5 parts by weight of a free radical initiator.