摘要:
The present invention provides a golf ball comprising a spherical core and at least one cover layer covering the spherical core, wherein the cover is formed from a polyurethane composition containing a polyurethane elastomer as a resin component, the polyurethane composition satisfying properties of rebound resilience of 54% or more and a shear loss modulus G″ of 5.03×106 Pa or less when measured in a shear mode using a dynamic viscoelasticity measuring apparatus at the conditions of the temperature of 0° C., and the oscillation frequency of 10 Hz, and the spherical core has a hardness distribution that R2 of a linear approximate curve determined by a least-squares method is 0.95 or more, when plotting JIS-C hardness measured at a center, a surface and at intervals of 2.5 mm from the center of the spherical core, versus distances from the center of the spherical core.
摘要:
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.
摘要翻译:本发明的目的是提供一种具有高弹性的高尔夫球。 本发明的要点在于选择用于高尔夫球橡胶组合物的有机硫化合物,其含有(a)基础橡胶,(b)共交联剂,(c)交联引发剂,和(d)有机 具有特定结构的有机硫化合物的硫化合物使得由下式(4)表示的结构中的取代基X的取代常数之和为0.2以上,由下式(4)表示的结构的SP值为 在19.0(J / cm 3)1/2至24.0(J / cm 3)1/2的范围内,并使用它们。
摘要:
The present invention provides a golf ball comprising a spherical core and at least one cover layer covering the spherical core, wherein the cover is formed from a polyurethane composition containing a polyurethane elastomer as a resin component, the polyurethane composition satisfying properties of rebound resilience of 54% or more and a shear loss modulus G″ of 5.03×106 Pa or less when measured in a shear mode using a dynamic viscoelasticity measuring apparatus at the conditions of the temperature of 0° C., and the oscillation frequency of 10 Hz, and the spherical core has a hardness distribution that R2 of a linear approximate curve determined by a least-squares method is 0.95 or more, when plotting JIS-C hardness measured at a center, a surface and at intervals of 2.5 mm from the center of the spherical core, versus distances from the center of the spherical core.
摘要:
An object of the present invention is to provide a golf ball showing a great flight distance on driver shots. The present invention provides 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) 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 and (d) a carboxylic acid having 1 to 14 carbon atoms, provided that the rubber composition further contains (e) a metal compound in case of containing only (b) the α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms as the co-crosslinking agent.
摘要:
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) using the same.
摘要:
A hollow golf ball comprising a hollow core and a cover layer that possesses good shot feel, an increased moment of inertia, and a high launch angle at the time of hitting. Immediately after impact, the hollow golf ball has a small spin amount. The specific hollow core reduces the rate of spin dumping between the ascending and descending of the ball, which results in increased flight distance. The hollow golf ball has a hollow core and a cover layer formed on the core, wherein the hollow core is composed of a hollow portion having a diameter of 5 to 30 mm and a core outer layer portion surrounding said hollow portion.
摘要:
An object of the present invention is to provide a golf ball showing a great flight distance on driver shots. The present invention provides a golf ball comprising a spherical core and at least one cover layer covering the spherical core, wherein the spherical core has a difference between absorbance of the absorption peak appeared at 1560±30 cm−1 at a surface thereof and absorbance of the absorption peak appeared at 1560±30 cm−1 at a center thereof of 0.024 or more, when measuring the spherical core with a Fourier transform infrared spectrophotometer.
摘要:
An object of the present invention is to provide a golf ball having a great flight distance on driver shots. The present invention provides a golf ball having a spherical core and at least one cover layer covering the spherical core, wherein when JIS-C hardness, which is measured at nine points obtained by dividing a radius of the spherical core into equal parts having 12.5% intervals therebetween, is plotted against distance (%) from a core center, the spherical core is such that R2 of a linear approximation curve obtained from the least square method is 0.95 or higher, and a hardness difference between a core surface hardness and a core central hardness is 15 or higher in JIS-C hardness.
摘要:
An object of the present invention is to provide a golf ball traveling a greater distance by improving the properties of the spherical core. The present invention provides 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 base rubber, a co-crosslinking agent, a crosslinking initiator, a filler and a polynuclear aromatic organic sulfur compound or a derivative thereof, and the spherical core has a specific hardness distribution without decreasing hardness from a central point toward a surface of the spherical core in JIS-C hardness.
摘要:
The present invention provides a solid golf ball that exhibits a high resilience performance and a high flight performance and gives a good shot feeling. The present invention relates to a solid golf ball including: a core including at least one layer; and a cover including at least one layer, the cover being provided to cover the core, wherein the at least one layer of the core is prepared by vulcanization-molding a rubber composition including: (a) a base rubber; (b) a co-crosslinking agent; (c) an organic peroxide; (d) a filler; and (e) a disulfide compound represented by formula (I): R1—S—S—R2 (I) wherein R1 and R2 each represent any one of the following groups: an aromatic hydrocarbon group; an aliphatic hydrocarbon group having two or more carbon atoms; a heterocyclic hydrocarbon group; and an alicyclic hydrocarbon group, each of which is optionally substituted, and R1 is a group different from R2.