Abstract: Disclosed is a golf ball having a cover formed from a thermoplastic polyurethane material exhibiting excellent mold releasability, despite the cover having dimples thereon and being difficult to remove from a mold. The cover material contains a thermoplastic polyurethane material as a primary component and a fatty acid amide and/or a montan wax serving as dispersants.

Abstract: Disclosed is a golf ball having a cover formed from a thermoplastic polyurethane material which can be recycled for molding, which exhibits high restitution, and which exhibits excellent scuff resistance.

Abstract: Disclosed is a golf ball cover property improving composition to be added to a thermoplastic polymer material such as a thermoplastic polyurethane material when a golf ball cover is formed from the thermoplastic polymer material, to thereby impart high restitution and excellent scuff resistance to the golf ball cover. The golf ball cover property improving composition contains an isocyanate mixture in which an isocyanate compound (X) having at least two isocyanate groups serving as functional groups in the molecule is dispersed in a thermoplastic resin (Y) which is substantially non-reactive with the isocyanate groups and which has a restitution elastic modulus of at least 45%.

Abstract: Disclosed is a process for producing a golf ball having a cover formed from a thermoplastic polyurethane material which can be recycled for molding, which exhibits high restitution, and which exhibits excellent scuff resistance.

Abstract: Disclosed is a golf ball having a cover formed from a thermoplastic polyurethane material which can be recycled for molding, which exhibits high restitution, and which exhibits excellent scuff resistance and discoloration resistance.

Abstract: Disclosed is a golf ball having a cover formed from a thermoplastic polyurethane material which can be recycled for molding, which exhibits high restitution, and which exhibits excellent scuff resistance.

Abstract: A material comprising a heated mixture of (A) an olefin-unsaturated carboxylic acid copolymer, an olefin-unsaturated carboxylic acid-unsaturated carboxylate copolymer, a metal ion neutralized product thereof, or a mixture thereof, (B) a polyurethane elastomer, and (C) an organic or inorganic basic compound has improved thermal stability, flow and moldability. Using the material, golf balls having good rebound are effectively manufactured.

Abstract: A golf ball having a core and a cover enclosing the core. The cover has one or more layers. At least one of the cover layers is composed mainly of a rubber-modified thermoplastic resin composition consisting essentially of a base resin in the form of an ionomer resin, a non-ionomer thermoplastic elastomer or a mixture thereof and a crosslinked functional rubbery copolymer.

Abstract: A resin composition comprising, in admixture, (A) a specific thermoplastic resin composition and (B) a comb-like graft copolymer comprising (b-1) a non-ionomer thermoplastic elastomer as backbone component and (b-2) a polymeric chain containing a non-olefinic monomer as side chain component wherein the weight ratio of (A):(B) is from 99:1 to 40:60 is improved in flow and moldability and thus suitable to form a layer of a golf ball which exhibits improved rebound and durability.

Abstract: A golf ball comprising a core and a cover enclosing the core, said cover having one or more layers,

Abstract: In a golf ball comprising a core and a cover of at least one layer, the cover layer is formed of a heated mixture of an ionomer resin and a metal salt such as magnesium stearate. The heated mixture exhibits such a crystal melting behavior that when measured by DSC, the difference between first and second peak temperatures is up to 30° C. The ball is improved in resilience.

Abstract: In a solid golf ball comprising an elastic solid core and a resin cover, the cover has a JIS-C hardness of 50-85, and provided that the ball receives a spin rate S1 (rpm) in the dry state and a spin rate S2 (rpm) in the wet state when hit with a short iron having a loft of an 8-iron or greater, the percent spin retention: (S2/S1)×100 is at least 47%. The ball's spin susceptibility when hit with the short iron is not reduced in the dry state or fine weather, nor is noticeably reduced even in the wet state or rain weather. The ball has so high performance that the ball travels a distance as intended, immediately stops on the green, is easy to control and thus, suited for professional and amateur low-handicap golfers.

Abstract: In a multi-piece solid golf ball comprising a rubbery elastic solid core and a resin cover including at least an inner layer, an intermediate layer and an outer layer, the solid core undergoes a deflection of 1.6-6.0 mm under an applied load of 294 N (30 kgf), the cover inner layer has a Shore D hardness of 55-70, the cover intermediate layer has a Shore D hardness of 8-50 and a gage of 0.1-1.2 mm, and the cover outer layer has a Shore D hardness of 40-55. The ball prevents any undesired increase of spin upon driver shots without detracting from rebound, has good flight performance, and receives enough spin to facilitate control on short iron shots.

Abstract: A mixture having good thermal stability, flow and moldability and suitable as a golf ball-forming material is obtained when a base resin comprising a (metal ion-neutralized) olefin-unsaturated carboxylic acid-unsaturated carboxylate ternary random copolymer and optionally a (metal ion-neutralized) olefin-unsaturated carboxylic acid binary random copolymer is blended with specific proportions of a fatty acid and/or fatty acid derivative and a basic inorganic metal compound capable of neutralizing acidic groups left unneutralized in the base resin and fatty acid. Using the same material, high-rebound golf balls can be effectively manufactured.

Abstract: A mixture having good thermal stability, flow and moldability and suitable as a golf ball-forming material is obtained when a resinous component including a base resin of an ionomer resin or resins and optionally a non-ionomer thermoplastic elastomer is blended with specific proportions of a fatty acid and/or fatty acid derivative and a basic inorganic metal compound capable of neutralizing acidic groups left unneutralized in the base resin and fatty acid. Using the same material, high-rebound golf balls can be effectively manufactured.

Abstract: The invention provides a golf ball cover stock based on a heated mixture of (a) an ionomer resin, (b) polyethylene, and (c) an epoxy group-modified polyolefin or (d) a low molecular weight polyethylene wax. Component (c) or (d) improves the dispersion of polyethylene in the ionomer resin so that a larger amount of polyethylene may be blended in micro-dispersion form. A golf ball having a cover made of the cover stock is durable and wear resistant and offers a good feel when hit.

Abstract: In a multi-piece solid golf ball comprising a solid core and a cover consisting of inner and outer layers, the cover inner layer is composed mainly of an ionomer resin, and the cover outer layer is composed mainly of another thermoplastic elastomer. A thermoplastic resin-base adhesive layer is interposed between the cover inner and outer layers, or a thermoplastic resin-base adhesive is blended in the inner and/or outer layer cover stock.

Abstract: A resin composition comprising, in admixture, (A) a specific thermoplastic resin composition and (B) a comb-like graft copolymer comprising (b-1) a non-ionomer thermoplastic elastomer as backbone component and (b-2) a polymeric chain containing a non-olefinic monomer as side chain component wherein the weight ratio of (A):(B) is from 99:1 to 40:60 is improved in flow and moldability and thus suitable to form a layer of a golf ball which exhibits improved rebound and durability.

Abstract: In a multi-piece solid golf ball comprising a solid core and a cover of two inner and outer layers enclosing the solid core, the solid core has a deflection of at least 1.

Abstract: In a multi-piece solid golf ball comprising a solid core and a cover of two inner and outer layers enclosing the solid core, the solid core has a deflection of at least 1.