Dunlop Sports Company Limited

Santoku Corporation

Hitachi Metals, Ltd.

Sri Sports Limited

Neomax Co., Ltd.

Ryo Murakami

Kazuyoshi Shiga

Takahiro Shigemitsu

Toshiyuki Tarao

Satoshi Hirosawa

Hirokazu Kanekiyo

Kazuhiko Yamamoto

Kazumasa Shintani

Kazuki Shiga

Hideaki Kimura

Tomoka Kitago

Yumi Kanemitsu

Yoshiyuki Ikeda

An object of the present invention is to provide a golf ball polyurethane composition excellent in resilience. Another object of the present invention is to provide a golf ball excellent in a shot feeling and resilience. The present invention provides a golf ball polyurethane composition comprising, as a resin component, a polyurethane elastomer including a polyisocyanate with one alicyclic hydrocarbon structure having 3 or more carbon atoms as a constituting component, and having a spin-lattice relaxation time (T) ofC nucleus of 8.9 seconds or less measured by a High resolution solid state nuclear magnetic resonance (NMR) method.

Golf ball polyurethane composition and golf ball

An object of the present invention is to provide a golf ball polyurethane composition excellent in resilience. Another object of the present invention is to provide a golf ball excellent in a shot feeling and resilience. The present invention provides a golf ball polyurethane composition comprising, as a resin component, a polyurethane elastomer including a polyisocyanate with one alicyclic hydrocarbon structure having 3 or more carbon atoms as a constituting component, and having a storage modulus E' (Pa) and a loss modulus E&#x2033; (Pa) satisfying a following expression;log()&#x2267;&#x2212;6.53when measured in a tensile mode using a dynamic viscoelasticity measuring apparatus.

An object of the present invention is to provide a golf ball excellent in a shot feeling and resilience. The present invention provides a golf ball resin composition comprising (A) at least one resin component selected from the group consisting of (a-1) a binary copolymer composed of an olefin and an &#x3b1;,&#x3b2;-unsaturated carboxylic acid having 3 to 8 carbon atoms, (a-2) an ionomer resin consisting of a metal ion-neutralized product of the binary copolymer, (a-3) a ternary copolymer composed of the binary copolymer components and an &#x3b1;,&#x3b2;-unsaturated carboxylic acid ester, and (a-4) an ionomer resin consisting of a metal ion-neutralized product of the ternary copolymer components; and (B) a basic metal salt of a fatty acid, and having a spin-lattice relaxation time (T1) ofC nucleus of 5.56 seconds or shorter measured by a High resolution solid state nuclear magnetic resonance (NMR) method.

Golf ball resin composition and golf ball

An object of the present invention is to provide a golf ball resin composition excellent in shot feeling and resilience. The golf ball resin composition includes (A) at least one resin component selected from the group consisting of (a-1) a binary copolymer composed of an olefin and an &#x3b1;,&#x3b2;-unsaturated carboxylic acid having 3 to 8 carbon atoms, (a-2) an ionomer resin consisting of a metal ion-neutralized product of the binary copolymer components, (a-3) a ternary copolymer composed of the binary copolymer components and an &#x3b1;,&#x3b2;-unsaturated carboxylic acid ester, and (a-4) an ionomer resin consisting of a metal ion-neutralized product of the ternary copolymer components; and (B) a basic metal salt of a fatty acid, and having a storage modulus E' (Pa) and a loss modulus E&#x2033; (Pa) satisfying a following expression;log()&#x2267;&#x2212;5.84when measured in a tensile mode using a dynamic viscoelasticity measuring apparatus.

An object of the present invention is to provide a golf ball polyurethane composition excellent in resilience. Another object of the present invention is to provide a golf ball excellent in a shot feeling and resilience. The present invention provides a golf ball polyurethane composition comprising, as a resin component, a polyurethane elastomer including a polyisocyanate with at least two alicyclic hydrocarbon structures having 3 or more carbon atoms as a constituting component, and having a spin-lattice relaxation time (T) ofC nucleus of 7.3 seconds or less measured by a High resolution solid state nuclear magnetic resonance (NMR) method.

An object of the present invention is to provide a golf ball polyurethane composition excellent in resilience. Another object of the present invention is to provide a golf ball excellent in a shot feeling and resilience. The present invention provides a golf ball polyurethane composition comprising, as a resin component, a polyurethane elastomer including a polyisocyanate with at least two alicyclic hydrocarbon structures having 3 or more carbon atoms as a constituting component, and having a storage modulus E' (Pa) and a loss modulus E&#x2033; (Pa) satisfying a following expression;log()&#x2267;&#x2212;6.08when measured in a tensile mode using a dynamic viscoelasticity measuring apparatus.

An object of the present invention is to provide a soft golf ball resin composition excellent in the shot feeling and resilience. The present invention provides a golf ball resin composition comprising: (A) 100 parts by mass of at least one resin component selected from the group consisting of (a-1) a binary copolymer, (a-2) a binary ionomer resin, (a-3) a ternary copolymer, and (a-4) a ternary ionomer resin, (B) 1 part to 25 parts by mass of a phosphate ester and/or a salt thereof; and (C) 0 part to 200 parts by mass of a basic inorganic metal compound. The golf ball of the present invention comprises a constituent member formed from the golf ball resin composition.

The present invention aims to provide a golf ball resin composition excellent in resilience and flexibility, and a golf ball having excellent properties in terms of resilience and shot feeling. The present invention relates to a golf ball resin composition, including: (A) at least one selected from the group consisting of: (a-1) a binary copolymer of an olefin and a C3-C8 &#x3b1;,&#x3b2;-unsaturated carboxylic acid; (a-2) a metal ion-neutralized product of a binary copolymer of an olefin and a C3-C8 &#x3b1;,&#x3b2;-unsaturated carboxylic acid; (a-3) a ternary copolymer of an olefin, a C3-C8 &#x3b1;,&#x3b2;-unsaturated carboxylic acid, and an &#x3b1;,&#x3b2;-unsaturated carboxylic acid ester; and (a-4) a metal ion-neutralized product of a ternary copolymer of an olefin, a C3-C8 &#x3b1;,&#x3b2;-unsaturated carboxylic acid, and an &#x3b1;,&#x3b2;-unsaturated carboxylic acid ester, and (B) a compound containing a hydrocarbon chain, a cationic moiety, and an anionic moiety in its molecule.

The present invention provides a golf ball resin composition comprising (A) an ionomer resin component and (B) a compound having an anionic part within a molecule thereof, wherein with respect to a metal ion contained in the golf ball resin composition, (A) the ionomer resin component and (B) the compound having the anionic part within the molecule thereof, following coordinate energies obtained by ab initio molecular orbital calculation method using a basis function B3LYP/6-31G(d) satisfy the following expression: 0.3&#x2266;(A&#x2212;C)/(B&#x2212;C)&#x2266;0.6, wherein coordinate energy A is the coordinate energy between the metal ion and the anionic part of (B) component, coordinate energy B is the coordinate energy between the metal ion and the carboxyl ion of (A) component, and coordinate energy C is the coordinate energy between the metal ion and the olefin of (A) the ionomer resin component.

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 present invention provides a golf ball resin composition having the spin-lattice relaxation time (T) ofC nucleus measured by a High resolution solid state carbon nuclear magnetic resonance (NMR) method of 7.3 seconds or shorter.

The present invention provides a resin composition for a golf ball and a golf ball which have high resilience while maintaining soft compression and also have low spin on driver shots, and therefore can achieve a long flight distance. The present invention relates to a resin composition for a golf ball, including an ionomer resin consisting of a metal ion-neutralized copolymer of (A) a C&#x3b1;,&#x3b2;-unsaturated carboxylic acid and (B) a C&#x3b1;,&#x3b2;-unsaturated carboxylic acid ester, the ionomer resin having a mass ratio of (A)/(B) of 10/90 to 25/75, and a degree of neutralization of 30 to 105 mol %.

Resin composition for golf ball and golf ball

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&#x2033; (Pa) satisfy a following expression;log()&#x2267;&#x2212;6.08when measured at the conditions of the temperature of 12&#xb0; C., the oscillation frequency of 10 Hz, and a strain of 0.05% in a tensile mode using a dynamic viscoelasticity measuring apparatus.

Disclosed are a method for producing alloy flakes for rare earth sintered magnets, which makes uniform the intervals, size, orientation, and shape of the R-rich region and the dendrites of the 2-14-1 phase, and alloy flakes for a rare earth sintered magnet obtained by the method. A rare earth sintered magnet employing the alloy flakes is also disclosed.

Process for producing alloy slab for rare-earth sintered magnet, alloy slab for rare-earth sintered magnet and rare-earth sintered magnet

The invention provides a method for producing alloy flakes for rare earth sintered magnets, which makes uniform the intervals, size, orientation, and shape of the R-rich region and the dendrites of the 2-14-1 phase, which inhibits formation of chill, and which produces flakes that are pulverized into powder of a uniform particle size in the pulverization step in the production of a rare earth sintered magnet, and that are pulverized into powder compactable into a product with a controlled shrink ratio, and alloy flakes for a rare earth sintered magnet obtained by the method, and a rare earth sintered magnet having excellent magnetic properties. The present method includes preparing an alloy melt of a composition consisting of R of rare earth metal elements and the balance M including B and Fe, and supplying and solidifying the alloy melt on a cooling roll, wherein the roll has on its surface linear nucleation inhibiting portions for inhibiting formation of dendrites or the like, and nucleating portions for formation of the dendrites, and wherein the inhibiting portions have a region with a width of more than 100 &#x3bc;m.

To make a raw alloy, consisting mostly of amorphous structure, highly productively and at a reduced cost for a nanocomposite magnet, a molten alloy represented by FeRQM(where R is at least one element selected from Pr, Nd, Dy and Tb; Q is B and/or C; M is at least one element selected from Co, Al, Si, Ti, V, Cr, Mn, Ni, Cu, Ga, Zr, Nb, Mo, Ag, Pt, Au and Pb; and 1 at %&#x2266;x&#x3c;6 at %, 15 at %&#x2266;y&#x2266;30 at % and 0 at %&#x2266;z&#x2266;7 at %) is prepared. This molten alloy is rapidly cooled by a strip casting process in which the alloy is fed onto a chill roller, rotating at a peripheral velocity of 3 m/s to less than 20 m/s, at a feeding rate per unit contact width of 0.2 kg/min/cm to 5.2 kg/min/cm. In this manner, an alloy including at least 60 volume percent of amorphous phase can be obtained.

Growing community of inventors

Kobe, Japan

Ryo Murakami