Abstract: Diamine is used to enhance adhesion between polyurethane and polyolefinic material or ionomeric material.

Abstract: An object of the present invention is to provide a golf ball resin composition excellent in resilience. Another object of the present invention is to provide a golf ball excellent in a shot feeling and resilience. The golf ball resin composition of the present invention is characterized in that a storage modulus E? (Pa) and a loss modulus E? (Pa) satisfy a following expression; log(E?/E?2)??6.08 when measured at the conditions of the temperature of 12° C., the oscillation frequency of 10 Hz, and a strain of 0.05% in a tensile mode using a dynamic viscoelasticity measuring apparatus.

Abstract: A rebound resilient golf ball having one or more core layers, a cover surrounding the core layer or layers, and optionally a mantle layer positioned between the cover and the core layer or layers. At least one of the layers of the golf ball includes a material whose resilience increases as the hardness of the material increases.

Abstract: A method of recycling a multi-material inner part of a golf ball includes a variety of steps. The inner part and cover are separated from one another. The inner part is pulverized into pieces. The pieces are placed in a liquid to separate the pieces of one material from the pieces of the other materials. A ball designed for use in such a system is also disclosed.

Abstract: A high performance golf ball includes a resin inner core, a rubber outer core, and a cover. The resin inner core is made of a blend of highly neutralized polymers and a low flexural modulus ionomer, and may include a blend of different highly neutralized polymers. A hardness relationship between the layers of the ball is specified to achieve particular performance characteristics. The cover is a single layer ionomer cover, and may be made from a blend of different grades of the ionomer. The ball as a whole has properties to maximize performance and aesthetic properties, such as backspin off the irons, feel, and sound.

Abstract: A center of a golf ball is formed from a composition having a flexural modulus from 150-450 MPa, a maximum loss factor (tan ?) between ?20 and 0° C. of 0.08 or less, a rebound resilience of 55% or more, and a slab hardness ranging from 40-60 in Shore D hardness. The center composition includes, as a resin component, 30 to 70 mass % of (A) a modified polyester elastomer having a Shore A hardness of 95 or less; 70-30 mass % of (B) a binary ionomer resin having a Shore D hardness of 65 or more, a flexural modulus of 300 MPa or more, and a melt flow rate (190° C., 2.16 kg) of 1.0 g/10 min or more; and 0-50 mass % of (C) a thermoplastic resin other than (A) and (B) components (provided that a total content of (A), (B), and (C) components is 100 mass %).

Abstract: A high performance golf ball includes a resin inner core, a rubber outer core, and a cover. The resin inner core is made of a blend of highly neutralized polymers and a low flexural modulus ionomer, and may include a blend of different highly neutralized polymers. The layers of the ball have specified compression values and relationships. The cover is a single layer ionomer cover, and may be made from a blend of different grades of the ionomer. The ball as a whole has properties to maximize performance and aesthetic properties, such as backspin off the irons, feel, and sound.

Abstract: A golf ball having a core that includes an aqueous solution contained by a boundary layer with a solid center suspended in the solution to modify the moment of inertia of the golf ball. The aqueous solution can be thixotropic, or rheopectic, or dilatant, or pseudoplastic in nature and the center formulated to simulate the specific gravity of the solution.

Abstract: The invention provides a solid golf ball which has a core of at least one layer and a cover of at least one layer. At least one layer of the core is formed primarily of polybutadiene and includes at least 0.05 part by weight of a polyurethane resin powder having an average particle size of not more than 2 mm per 100 parts by weight of rubber component. At least one layer of the cover is formed primarily of polyurethane.

Abstract: A high performance golf ball includes a resin inner core, a rubber outer core, and a cover. The resin inner core is made of a blend of highly neutralized polymers and a low flexural modulus ionomer, and may include a blend of different highly neutralized polymers. The inner core has a specified range of coefficients of restitution when measured at different velocities. The cover is a single layer ionomer cover, and may be made from a blend of different grades of the ionomer. The ball as a whole has properties to maximize performance and aesthetic properties, such as backspin off the irons, feel, and sound.

Abstract: A high performance golf ball includes a resin inner core, a rubber outer core, and a cover. The resin inner core is made of a blend of highly neutralized polymers and a low flexural modulus ionomer, and may include a blend of different highly neutralized polymers. The inner core and cover layer each has a specified hardness with a hardness relationship. The cover is a single layer ionomer cover, and may be made from a blend of different grades of the ionomer. The ball as a whole has properties to maximize performance and aesthetic properties, such as backspin off the irons, feel, and sound.

Abstract: The present invention is directed to golf balls having a diameter of greater than 1.68 inches and including at least one layer formed from an HNP composition.

Abstract: A high performance golf ball includes a resin inner core, a rubber outer core, and a cover. The resin inner core is made of a blend of highly neutralized polymers and a low flexural modulus ionomer, and may include a blend of different highly neutralized polymers. The inner core has a specified specific gravity. The cover is a single layer ionomer cover, and may be made from a blend of different grades of the ionomer. The ball as a whole has properties to maximize performance and aesthetic properties, such as backspin off the irons, feel, and sound.

Abstract: An object of the present invention is to provide a golf ball having high resilience. The present invention provides a golf ball having a constituting member, wherein at least a part of the constituting member is formed from a rubber composition containing (a) a base rubber, (b) a co-crosslinking agent, (c) a crosslinking initiator, and (d) an organic sulfur compound, the organic sulfur compound being derivatives of thiophenols and disulfide with a strong electron withdrawing substituent.

Abstract: A golf ball includes a core, a cover covering the core, and a clear layer covering the cover. The cover has dimples and a land. An xy coordinate of a hue of an outermost layer in the core excluding a colorless and transparent layer is included in any one of eight zones I to VIII. An xy coordinate of a hue of the cover is included in any one of the eight zones I to VIII which is different from and is not adjacent to the zone in which the xy coordinate of the hue of the outermost layer is included. A ratio (T1/T2) of a thickness T1 of the cover immediately below a deepest portion of each dimple and a thickness T2 of the cover immediately below the land is equal to or greater than 0.50 but equal to or less than 0.80.

Abstract: A ball includes a core, a cover, and an intermediate layer between the core and the cover. The intermediate layer may be deformed or actuated to create discontinuities in the cover. The creation of discontinuities allows for easier recycling of the ball parts. The intermediate layer may include one of a bladder or a hydrophilic material that expand upon the introduction of a fluid, a shape memory polymer that deforms upon application of a stimulus, or two materials that react chemically to form a gas.

Abstract: A ball includes a core, a cover, and a separator or separating layer. The separating layer may be deformed or actuated to separate at least a portion of the cover from the core. This removal allows for easier recycling of the ball parts. The separating layer may include one of a bladder or a hydrophilic material that expand upon the introduction of a fluid, a shape memory polymer that deforms upon application of a stimulus, or two materials that react chemically to form a gas.

Abstract: Multi-piece golf balls having a solid core of at least one layer and cover of at least one layer are provided. At least one of the layers is formed from a thermoplastic polyamide composition, consisting essentially of a blend of about 40 to about 99% by weight polyamide and about 1 to about 60% by weight fatty acid salt. Preferably, the ball has a dual core construction. A rubber composition is preferably used to form the inner core and the polyamide composition is preferably used to form the outer core layer. The resulting ball has high resiliency along with a soft feel.

Abstract: A golf ball has a diameter of at least about 43.6 mm and a density of from about 0.85 g/cm3 to 1.05 g/cm3. The golf ball can be made of ionomer resin or a combination of ionomer resins, including highly neutralized polymers and highly resilient polymers as disclosed. The golf ball may have a solid core made of a highly neutralized polymer or highly resilient polymer and a cover of an ionomer resin.

Abstract: An object of the present invention is to provide a golf ball having high resilience. The gist of the present invention resides in selecting an organic sulfur compound used for a golf ball rubber composition containing (a) a base rubber, (b) a co-crosslinking agent, (c) a crosslinking initiator, and (d) the organic sulfur compound from organic sulfur compounds having specific structures such that a sum of substituent constants of the substituents X in a structure represented by the following formula (4) is 0.2 or more and SP value of the structure represented by the following formula (4) is in a range from 19.0 (J/cm3)1/2 to 24.0 (J/cm3)1/2 and using the same.

Abstract: In a colored golf ball having a core, a cover of two or more layers encasing the core, and a coat of paint applied to a surface of an outermost layer of the cover, the outermost cover layer is formed of a resin composition which includes (a) a thermoplastic resin, (b) a fluorescent color-containing color pigment and/or dye, and (c) titanium oxide. A layer adjoining an inner side of the outermost layer is formed of a resin composition containing a resin. The colored golf ball has an excellent rebound and weatherability, and also is endowed with a high brightness and a sense of quality and elegance.

Abstract: A golf ball includes four layers. The first, third, and fourth layers are made from thermoplastic materials and the second is made of a thermoset material. The third layer is the hardest and is at least 10 Shore D harder than the fourth layer. The flexural modulus of the third layer is greater than that of the first layer, and the flexural modulus of the first layer is greater than that of the fourth layer.

Abstract: Golf balls having a core comprising a polyalkenamer rubber composition are provided. The rubber composition may further include other rubbers such as, for example, polybutadiene, polyisoprene, ethylene propylene rubber, ethylene propylene diene rubber, and styrene-butadiene rubber. The rubber composition helps improve resiliency of the core and provides the ball with a comfortable and soft feel. In one version, a solid, single core having an outer surface and geometric center is provided, wherein the outer surface has a hardness greater than the hardness of the geometric center to define a positive hardness gradient of at least 10 Shore C. In a second version, a dual-core having an inner core and surrounding outer core layer is provided. The inner core has a positive hardness gradient, while the outer core has a zero; negative; or positive hardness gradient.

Abstract: The present invention provides a golf ball which includes (I) a first member composed of a material molded under heat from a rubber composition of (a) a base rubber composed primarily of a mixture of at least 60 wt % of a polybutadiene having a stress relaxation time (T80), as defined below, of less than 4 seconds and up to 40 wt % of a polybutadiene having a stress relaxation time (T80) of at least 4 seconds, (b) an unsaturated carboxylic acid and/or a metal salt thereof, and (c) an organic peroxide; and (II) a second member composed of a specific, highly-neutralized, resin composition. The golf ball of the invention, by being thus constituted, has an excellent resilience for the ball as a whole, a good, soft, feel on impact, and imparts an excellent spin performance, thereby enabling an increased distance to be achieved. In addition, it has a high manufacturability.

Abstract: The invention provides a solid golf ball which has a core of at least one layer and a cover of at least one layer. At least one layer of the core is formed primarily of polybutadiene and includes at least 0.05 part by weight of a polyurethane resin powder having an average particle size of not more than 2 mm per 100 parts by weight of rubber component. At least one layer of the cover is formed primarily of polyurethane.

Abstract: The present invention relates to a golf ball including a core, one or more mantle layers and an outer cover layer, and one or more of the core, one or more mantle layers or outer cover layer includes a partially hydrogenated polybutadiene having a viscosity at 200° C. of less than about 5,000 Pa-sec and a storage modulus (G?) at 1 Hz and 25° C. of greater than about 1×107dyn/cm2.

Abstract: The invention provides a rubber composition for golf balls which includes (A) a base rubber containing a polybutadiene having a cis-1,4 bond content of at least 60 wt %, (B) an unsaturated carboxylic acid and/or a metal salt thereof, and (C) a diphenylamine of the general formula wherein R1 and R2 are each independently a hydrogen atom or a hydrocarbon group of 1 to 20 carbons, m is an integer from 1 to 5, and n is an integer from 1 to 4, with the proviso that if m and/or n is 2 or more, each occurrence of R1 and R2 may be the same or different. The golf ball rubber composition of the invention enables a high-quality molded and crosslinked product having a suitable hardness and a high resilience to be obtained.

Abstract: Golf balls having cores with negative hardness gradients are provided. The cores are made of polyalkenamer rubber compositions that may further include other rubbers such as, for example, polybutadiene, polyisoprene, ethylene propylene rubber, ethylene propylene diene rubber, and styrene-butadiene rubber. In one version, a solid, single core having an outer surface and center is provided, wherein the outer surface has a hardness substantially the same or lower than the hardness of the center to define a zero or negative hardness gradient. Dual-cores having inner and outer cores can be made, wherein the inner core has a negative hardness gradient and the outer core has a positive or negative hardness gradient. The rubber composition helps improve resiliency of the core and provides the ball with a comfortable and soft feel.

Abstract: The present invention provides a golf ball composed of a core and a cover having an outside surface on which are formed a plurality of dimples. Letting BV and CV be the initial velocity (m/s) of, respectively, the ball and the core as measured by a method using an initial velocity measuring apparatus of the same type as a USGA drum rotation-type initial velocity instrument and letting BE and CE be the deflection (mm) of, respectively, the ball and the core when compressed under a final load of 1,275 N (130 kgf) from an initial load of 98 N (10 kgf), the core initial velocity CV is from 70.0 to 78.0 m/s and the ball satisfies the formula ?1.0?(BV/BE)?(CV/CE)?3.0. The golf ball of the invention has a flight distance that can be reduced compared with official golf balls currently in use, yet has the same good feel on impact and excellent controllability, scuff resistance and durability to repeated impact as a game ball.

Abstract: Embodiments of the disclosed polymer composition comprise a first unsaturated polymer or polymer precursor, and an effective amount of a peptizer. The peptizer typically comprises a heteroaryl or a heterocyclic compound, other than morpholine as disclosed in assignee's prior applications. Disclosed polymer compositions are useful for making sports equipment, such as at least one layer of a golf ball, often a core. Because the compositions are useful for making golf balls, materials commonly known for making such golf balls can be used in combination with the polymer composition. A method for forming a golf ball also is disclosed. The method comprises providing disclosed compositions and then forming at least one component of a golf using the composition.

Abstract: A golf ball with at least one core layer, at least one intermediate layer, and at least one cover layer. Any combination of the layers of the golf ball may feature a visually enhancing means. The cover layer is preferably translucent and provides a view to the intermediate layer and/or the core layer. The intermediate layer has a non-uniform thickness. The core may comprise a non-spherical insert. The intermediate layer and the core layer may affect the spin rate of the golf ball. The intermediate layer may be used to indicate the alignment of the golf ball.

Abstract: A durable, injection moldable, thermoplastic elastomer that has the favorable resilience, feel, spin, barrier, and UV stability performance attributes is disclosed herein. An OBC grafted with silane provides a good cover shear durability (cut/tear/abrasion resistance). This invention combines the benefits of OBCs and silane crosslinking technology to yield a golf ball cover with a desirable combination of properties.

Abstract: Compositions for golf balls including modified highly neutralized polymeric compositions that have improved processability including improved melt flow index and improved performance characteristics when included in a layer of a golf ball. In addition, the compositions of the invention have less moisture transmission and higher flexural modulus than non-modified highly neutralized polymers.

Abstract: A four piece golf ball includes several relationships among the values of the densities of its layers. Namely, the sum of the density of the inner core and the outer core is at least 2 g/cm3, the sum of the density of the inner cover layer and the outer cover layer is at least 2.2 g/cm3, and the difference between these two sums is at least 0.1 g/cm3. The inner core is made of a highly neutralized acid polymer, the outer core is made of a polybutadiene rubber, and the inner and outer cover layers are made of a non-ionomeric thermoplastic material, such as thermoplastic polyurethane. The layers may have certain relationships among their hardness values. Finally, the golf ball exhibits certain physical properties, such as a certain moment of inertia.

Abstract: Disclosed herein are multilayer golf balls having a layer with a higher Shore C hardness and a lower Shore D hardness than another layer.

Abstract: Multi-piece golf balls having at least one component made of a rubber composition comprising substantially oriented nanostructures are provided. For example, the nanostructures may be in the form of nanofibers, nanorods, nanotubes, and nanoparticles. The multi-piece golf ball contains a core, which may have a dual-core construction including a center and surrounding outer core layer or other multi-layered structure. Preferably at least one of the core layers is formed from a polybutadiene rubber composition comprising the nanostructures. The polybutadiene rubber may be chemically or non-chemically modified. The polybutadiene preferably has a cis-bond content of at least 80%.

Abstract: A golf ball comprising a core and a cover layer having a cover inner surface and a cover outer surface that treated with and comprises a fatty acid and/or fatty acid salt composition and has a hardness ?, the cover inner surface not being treated with and not comprising the fatty acid and/or fatty acid salt composition and having a hardness ?. Hardness ? is greater than hardness ?. The cover layer may alternatively comprise an untreated cover region and a treated cover region that extends inward from the cover outer surface a depth of about 1% or greater of a distance between the cover outer surface and the cover inner surface. Alternatively, the treated cover region may extend inward from the cover outer surface a predetermined depth DCTr while the untreated cover region is disposed between the cover inner surface and the treated cover region a predetermined depth DCUTr.

Abstract: A golf ball comprising a core and a cover layer having a cover inner surface, a cover outer surface, a treated cover region, and an untreated cover region, the treated cover region extending inward from the cover outer surface a depth DCTr and being treated with and comprising a fatty acid and/or fatty acid salt composition, the untreated cover region disposed between the cover inner surface and the treated cover region and having a depth DCUTr, the untreated cover region comprising n regions of hardness wherein n?1 and wherein at least one of the n regions of hardness has a hardness H1 such that the hardness ? is greater than the hardness H1, and wherein each of said n regions of hardness further comprise a depth DCUTn such that DCTr?(1/n)(DUT1+DUT2+ . . . +DUTn). In another embodiment, DCTr?(n)(DCUT1+DCUT2+ . . . +DCUTn). In yet another embodiment, DCTr?(1/n2)(DCUT1+DCUT2+ . . . +DCUTn).

Abstract: A golf ball 2 has, on a surface thereof, a plurality of types of dimples 8 having different diameters from each other. The standard deviation of the curvature radii of cross sections of all the dimples 8 is 0.90 mm or less. The average of the curvature radii of the cross sections of all the dimples 8 is greater than 40% but 50% or less of the diameter of the golf ball 2. The sum of the volumes of all the dimples 8 is 280 mm3 or greater but 350 mm3 or less. The average of the diameters of all the dimples 8 is 3.9 mm or greater but 4.5 mm or less. The ratio of the sum of the areas of all the dimples 8 to the surface area of a phantom sphere of the golf ball 2 is 75% or greater but 95% or less.

Abstract: A golf ball 2 has, on a surface thereof, a plurality of types of dimples 10 having different diameters from each other. The standard deviation of the curvature radii of cross sections of all the dimples 10 is 0.90 mm or less. The average of the curvature radii of the cross sections of all the dimples 10 is 20% or greater but 40% or less of the diameter of the golf ball. The sum of the volumes of all the dimples is 300 mm3 or greater but 370 mm3 or less. The average of the diameters of all the dimples is 3.5 mm or greater but 4.5 mm or less. The ratio of the sum of the areas of all the dimples to the surface area of a phantom sphere of the golf ball is 75% or greater but 95% or less.

Abstract: A golf ball is provided that includes a coating. The coating is designed to allow a golfer to modify or increase the tackiness of the coating. The coating changes tackiness when exposed to a soaking material. A method of determining a desirable length of soak is also disclosed.

Abstract: Multi-piece golf balls having at least one component made of a composition comprising a polymerized substituted imidazolium liquid ionomer are provided. The multi-piece golf ball contains a core, which may have a dual-core construction including a center and surrounding outer core layer or other multi-layered structure. Preferably at least one of the core layers is formed from a composition comprising a rubber material or highly neutralized acid copolymer (HNP) and the liquid ionomer. The resulting golf ball has high resiliency.

Abstract: The invention provides a golf ball having a core and ah cover of at least one layer. The core has a cross-sectional hardness which, letting R (mm) be the radius of the core, A be the JIS-C hardness at a center of the core, B be the JIS-C hardness at a position R/3 mm from the core center, C be the JIS-C hardness at a position R/1.8 mm from the core center, D be the JIS-C hardness at a position R/1.3 mm from the core center, and E be the JIS-C hardness at a surface of the core, satisfies the formulas (1) D?C?7, (2) C?B?7, (3) (D?C)?(C?B)?7, and (4) E?A?16.

Abstract: The invention provides a multi-piece solid golf ball having a core of at least one layer, a cover of at least two layers which includes an inner cover layer and an outermost cover layer, and a plurality of dimples formed on a surface of the ball. The thickness and Shore D hardness of the outermost cover layer are set in specific ranges, the thickness and Shore D hardness of the inner cover layer are set in specific ranges, and the ball surface has, as expressed in the Lab color system defined by JIS Z-8730, a lightness L value of at least 89, an a value of at least 2 but not more than 10, and a b value of ?20 or above. The multi-piece solid golf ball of the invention increases the reddish coloring of a white golf ball, thereby enhancing the stylishness of the ball and improving the way the ball looks and feels to the golfer when it is played.

Abstract: The invention relates to golf ball formulations formed from blends of linear and branched polybutadienes catalyzed with neodymium that have improved properties and processing characteristics. Golf ball components may be formed from the blends to provide high coefficient of restitution.

Abstract: Golf equipment having improved cut and shear resistance that includes a polyurea composition, preferably saturated and/or water resistant, formed of a polyurea prepolymer and a curing agent, wherein the polyurea prepolymer includes an isocyanate and an amine-terminated compound, and wherein the curing agent includes a hydroxy-terminated curing agent, amine-terminated curing agent, or a mixture thereof.

Abstract: The invention provides a golf ball endowed with an improved distance and durability. The ball has a core and a cover, the core being formed of a rubber composition containing a base rubber, a co-crosslinking agent, a crosslinking initiator, a metal oxide and an organosulfur compound. The co-crosslinking agent is methacrylic acid, the metal oxide is zinc oxide, and the rubber composition contains the crosslinking initiator in an amount of from 1.2 to 5 parts by weight per 100 parts by weight of the base rubber. The finished ball has an initial velocity of at least 74.3 m/s.

Abstract: The invention provides a golf ball endowed with an improved distance and durability. The ball has a core and a cover, the core being formed of a rubber composition containing a base rubber, a co-crosslinking agent, a crosslinking initiator and a metal oxide. The base rubber is a mixture of (A) polybutadiene with (B) styrene-butadiene rubber and/or isoprene rubber, the co-crosslinking agent is methacrylic acid, and the metal oxide is zinc oxide. The rubber composition contains the crosslinking initiator in an amount of from 1.2 to 5 parts by weight per 100 parts by weight of the base rubber.

Abstract: The present disclosure provides to a kit for customizing and recycling golf balls, and related methods. The kit includes one or more sets of golf ball covers, may include one or more sets of golf ball cores, and may further include a golf ball cover removal device and a golf ball cover application device. A golfer may select a golf ball cover from a set based on a desired play characteristic. For example, the golfer may select a relatively hard cover from a set of golf ball covers having different hardness values. The golfer may then apply the selected golf ball cover to a golf ball core using the golf ball cover application device. The core may be selected from a set of cores in the kit, or the core may be obtained from a recycled golf ball using a golf ball cover removal device.

Abstract: A golf ball comprising a core comprising an inner core center and an outer core layer disposed over the inner core center. The inner core center has a deflection of greater than 0.210 inch under a load of 100 kilograms, and the entire the core has a deflection ranging from 0.130 inch to 0.105 inch under a load of 100 kilograms. A mantle layer is disposed over the core and a cover is disposed over the mantle.