Abstract: A foam composition that includes a polymer material such as polyurethane or polyurea and a leachable water-soluble fine powder is provided. This composition can be used in a relatively simple process to obtain a foam body (porous body) that is uniform only at the surface or uniform throughout. The foam body can be suitably used as a golf ball member in golf balls required to have good controllability on approach shots. Also provided is a method for producing a foam member, which method includes the steps of molding the foam composition to obtain a solid molded body, and then leaching out and removing the water-soluble fine powder so as to obtain a foam-molded body.

Abstract: An object of the present invention is to provide a method for producing a coated material by using a composition that can be spray-coated, and that does not run downward after coating (i.e., rheology controllable). The method for producing a coated material includes step (1) of applying an electron beam-curable composition containing an ethylenically unsaturated group-containing compound to a substrate to form a coating film that has a surface viscosity of 1 Pa·s to 300 Pa·s as measured based on an electric-field pickup method, step (2) of drying the coating film obtained in step (1) to form a dry coating film when the electron beam-curable composition contains a volatile component, and step (3) of irradiating the substrate that has the coating film obtained in step (1) or the dry coating film obtained in step (2) with electron beams in an inert gas atmosphere to form a cured coating film.

Abstract: In a golf ball having a core and a cover of one or more layer, the core is formed of a material molded under heat from a rubber composition containing (a) a base rubber, (b) water and/or a lower alcohol having a specific molecular weight, (c) an ?,?-unsaturated carboxylic acid and/or a metal salt thereof, and (d) an organic peroxide. The base rubber (a) is a rubber obtained by mixing together (a-1) a polybutadiene and (a-2) an unneutralized ethylene-unsaturated carboxylic acid copolymer, and subsequently neutralizing the copolymer with (a-3) a metal oxide. Component (a-2) has a specific acid content and accounts for a specific portion of the combined amount of components (a-1) and (a-2). The core surface and center have a specific JIS-C hardness difference therebetween. This ball achieves both a lower spin rate and excellent durability while maintaining a high rebound.

Abstract: In a golf ball having a core of at least one layer and a cover of one or more layer encasing the core, at least one layer of the cover is formed of a resin composition that includes (I) a polyurethane or a polyurea and (II) an aromatic vinyl elastomer which together satisfy certain specific conditions. The golf ball has an excellent controllability on approach shots and is also able to maintain a good scuff resistance.

Abstract: In a golf ball comprising a core, a cover layer, an intermediate layer between the core and the cover layer, the cover layer is formed of a resin material composed primarily of polyurethane or polyurea, a sphere obtained by encasing the core with the intermediate layer (intermediate layer-encased sphere) has a lightness (Li value) in the L*a*b* color space of at least 25 on its surface, and the cover layer has a visible light transmittance of at least 0.6%. The golf ball has a surface with a distinctive aesthetic appearance and retains both a good spin performance and a good scuff resistance, making it useful as a ball for professional and skilled amateur golfers.

Abstract: A golf ball is provided that includes at least one porous resin layer formed of a resin composition containing a polymeric material and a leachable water-soluble polymer. In a method for producing the golf ball, a resin composition containing the polymeric material and the water-soluble polymer is molded to form a solid molded body, following which the water-soluble polymer is partially leached out and removed. The golf ball has an improved ball controllability on approach shots and an improved feel at impact, maintains a good scuff resistance and has a good moldability.

Abstract: In order to satisfy at a high level the golf ball flight and control performances relied on by professional golfers and skilled amateurs, this invention provides a multi-piece solid golf ball G having a core 1, a cover 3 and an intermediate layer 2 therebetween wherein the core is formed of a rubber composition that includes an alcohol having a value obtained by dividing the molecular weight of the alcohol by the number of hydroxyl groups thereon which is 70 or less. Also, letting Hc be the JIS-C hardness at the center of the core, H12 be the JIS-C hardness at a position 12 mm from the core center and Ho be the JIS-C hardness at the surface of the core, the core has a hardness profile in which these hardnesses satisfy fixed relationships defined by specific formulas.

Abstract: An object of the present invention is to provide a method for producing a coated material by using a composition that can be spray-coated, and that does not run downward after coating (i.e., rheology controllable). The method for producing a coated material includes step (1) of applying an electron beam-curable composition containing an ethylenically unsaturated group-containing compound to a substrate to form a coating film that has a surface viscosity of 1 Pa·s to 300 Pa·s as measured based on an electric-field pickup method, step (2) of drying the coating film obtained in step (1) to form a dry coating film when the electron beam-curable composition contains a volatile component, and step (3) of irradiating the substrate that has the coating film obtained in step (1) or the dry coating film obtained in step (2) with electron beams in an inert gas atmosphere to form a cured coating film.

Abstract: In order to satisfy at a high level the golf ball flight and control performances relied on by professional golfers and skilled amateurs, this invention provides a multi-piece solid golf ball G having a core 1, a cover 3 and an intermediate layer 2 therebetween wherein the core is formed of a rubber composition that includes an alcohol having a value obtained by dividing the molecular weight of the alcohol by the number of hydroxyl groups thereon which is 70 or less. Also, letting Hc be the JIS-C hardness at the center of the core, H12 be the JIS-C hardness at a position 12 mm from the core center and Ho be the JIS-C hardness at the surface of the core, the core has a hardness profile in which these hardnesses satisfy fixed relationships defined by specific formulas.

Abstract: In a golf ball having a cover layer that is formed of a resin material composed primarily of polyurethane or polyurea, the cover layer includes a colored surface portion having a visible light transmittance of at least 0.6%. A method for producing the golf ball includes the steps of forming the cover layer over a core or other target sphere and providing the colored surface portion by coloring the surface of the cover layer. The cover layer which includes the colored surface portion has a visible light transmittance of at least 0.6%. The golf ball has a surface with a distinctive aesthetic appearance and retains both a good spin performance and a good scuff resistance, making it useful as a ball for professional and skilled amateur golfers.

Abstract: In a golf ball having a rubber core of at least one layer and an inner cover layer and outer cover layer which encase the core, the inner cover layer is formed of a resin composition that includes (A) a polyurethane or polyurea and (B) a thermoplastic polyester elastomer, which resin composition has a Shore D hardness of 52 or less and a rebound resilience of at least 50%, and the outer cover layer is formed of a resin composition which includes a polyurethane or polyurea of the same type as component (A) or of a different type. This ball has an improved rebound, an optimal spin rate on approach shots and thus a good controllability, and an excellent durability.

Abstract: A resin composition for golf balls is made of (A) polyurethane or polyurea and (B) a styrene resin material, component (B) being included in an amount of 0.5 to 50 parts by weight per 100 parts by weight of component (A). In a golf ball having a core and a cover of one or more layer encasing the core, at least one cover layer is formed of this resin composition. The resin composition is especially useful as a golf ball cover material because the ball does not fly too far and is easier to control on approach shots, yet does not sacrifice distance on shots with a driver.

Abstract: A golf ball having a core and a cover that is formed of a resin composition which includes (A) a polyurethane or a polyurea and (B) a styrenic resin material, when dropped from a height of 3 m and made to collide with a metal plate, has velocities 200 ms before and 200 ms after contact that satisfy the condition: (incident velocity)?(rebound velocity)?0.80 m/s. The ball has a good controllability on approach shots without a loss in the distance achieved on shots with a driver, and thus is particularly useful to professional golfers and skilled amateurs.

Abstract: A resin composition for golf balls includes specific amounts of (A) polyurethane or polyurea and (B) an oxazoline group-containing acrylic polymer or an oxazoline group-containing styrene polymer. A golf ball having a core encased by a cover of one or more layers, wherein at least one cover layer is formed of this resin composition, exhibits a good adhesion between adjoining layers, enabling the ball to achieve a high scuff resistance without lowering the initial velocity of the ball.

Abstract: In a golf ball having a core of at least one layer and a cover of one or more layer encasing the core, at least one layer of the cover is formed of a resin composition that includes (I) a polyurethane or a polyurea and (II) an aromatic vinyl elastomer which together satisfy certain specific conditions. The golf ball has an excellent controllability on approach shots and is also able to maintain a good scuff resistance.

Abstract: The invention provides a golf ball resin composition that includes (A) an aromatic vinyl elastomer and (B) a polyurethane or a polyurea, the amount of component (A) being 50 parts by weight or less per 100 parts by weight of component (B), and also provides a golf ball in which at least one cover layer is formed of this resin composition. The resin composition is particularly useful as a golf ball cover material because golf balls in which it is used do not fly too far and have a good controllability on approach shots, and moreover maintain a good scuff resistance and moldability without a loss of distance on shots with a driver.

Abstract: In order to satisfy at a high level the golf ball flight and control performances relied on by professional golfers and skilled amateurs, this invention provides a multi-piece solid golf ball G having a core 1, a cover 3 and an intermediate layer 2 therebetween wherein the core is formed of a rubber composition that includes an alcohol having a value obtained by dividing the molecular weight of the alcohol by the number of hydroxyl groups thereon which is 70 or less. Also, letting Hc be the JIS-C hardness at the center of the core, H12 be the JIS-C hardness at a position 12 nun from the core center and Ho be the JIS-C hardness at the surface of the core, the core has a hardness profile in which these hardnesses satisfy fixed relationships defined by specific formulas.

Abstract: A resin composition for golf balls is made of (A) polyurethane or polyurea and (B) an acrylic resin or a methacrylic resin, component (B) being included in an amount of from 0.5 to 50 parts by weight per 100 parts by weight of component (A). In a golf ball having a core and a cover of one or more layer encasing the core, at least one cover layer is formed of this resin composition. The resin composition is especially useful as a golf ball cover material because it makes it possible to achieve a higher ball initial velocity on shots with a driver and a lower ball initial velocity on approach shots.

Abstract: In order to satisfy at a high level the golf ball flight and control performances relied on by professional golfers and skilled amateurs, this invention provides a multi-piece solid golf ball G having a core 1, a cover 3 and an intermediate layer 2 therebetween wherein the core is formed of a rubber composition that includes a lower alcohol having a molecular weight below 200. Also, letting Hc be the JIS-C hardness at the center of the core, H12 be the JIS-C hardness at a position 12 mm from the core center and Ho be the JIS-C hardness at the surface of the core, the core has a hardness profile in which these hardnesses satisfy fixed relationships defined by specific formulas.

Abstract: In a golf ball having a core of at least one layer and a cover encasing the core, the cover is formed of a resin composition composed primarily of a polyurethane or a polyurea. Letting HMa (N/mm2) be the Martens hardness of the cover measured at a position 0.3 mm toward the center of the ball from the cover surface and ?Ita (%) be the elastic recovery of the cover, HMa and ?Ita satisfy the following conditions: (1) ?Ita??1.16×HMa+79, (2) 10.0?HMa?38.0, and (3) 40??Ita?80. The ball has an excellent spin performance on approach shots and an excellent scuff resistance.