Abstract: A Multi-Link access point apparatus uses multiple combinations of link offset information and information of the number of links to notify, by using only a small amount of information, whether a frame is buffered that is addressed to a Multi-Link station apparatus operating in a Power Management mode and information of a link, the use of which is indicated or recommended.

Abstract: A golf ball material contains (i) fine particles that have an average particle size of less than 300 ?m and are composed of a crosslinked multi-component copolymer having conjugated diene units, non-conjugated olefin units and aromatic vinyl units; and (ii) a thermoplastic resin. The conjugated diene units include butadiene units, the non-conjugated olefin units include units selected from the group consisting of ethylene, propylene and 1-butene units, the aromatic vinyl units include styrene units, and the content of the conjugated diene units in the multi-component copolymer is 5 wt % or more. This golf ball material is soft, has an excellent rebound resilience and also has a good processability.

Abstract: In a golf ball having a core of one or more layer, an intermediate layer and a cover, the cover consists of an inner cover layer and an outer cover layer, the inner cover layer and the outer cover layer being made of materials having hardnesses on the Shore D hardness scale of, respectively, from 20 to 40 and from 35 to 55, and the inner and outer cover layers having a combined thickness of from 0.6 to 1.2 mm. Also, letting (A) and (B) be the rebound resiliences (%) of, respectively, the inner cover layer material and the outer cover layer material based on JIS-K 6255, the ball satisfies the condition 0%<(A)?(B)<18%. This ball exhibits a higher spin rate on approach shots and a good feel without lowering the distance performance on shots with a driver (W #1).

Abstract: The present invention provides a golf ball comprising a core of one or more layers and a cover of one or more layers which encases the core, wherein at least one layer of the cover is formed of the resin composition comprising (a?) a polyester resin and (b) an amine-containing polymer having a branched structure. In the golf ball of the present invention, the adhesion property between the core and each cover layer adjacent to the core can be improved and the excellent durability can be obtained.

Abstract: A resin composition for golf balls includes (a) an acid-containing copolymer having an amount of acid constituent per 100 wt % of the sum of monomer units in the copolymer that is from 1 to 30 wt %, and (b) an amine-containing polymer having a branched structure. The resin composition imparts golf balls with an excellent rebound resilience and also confers an outstanding durability to repeated impact and an outstanding scuff resistance, making it particularly useful as a cover material in golf balls.

Abstract: A rubber composition for golf balls includes (A) a base rubber, (B) an acrylate ester or methacrylate ester containing an isocyanate group or a blocked isocyanate group, (C) diacrylic acid, dimethacrylic acid or a metal salt thereof, and (D) an organic peroxide. In a golf ball having a core formed of the rubber composition and a cover of one or more layers which encases the core, the rubber composition exhibits a spin rate-lowering effect on shots and can thus improve the flight performance of the ball.

Abstract: A golf ball material contains (i) fine particles that have an average particle size of less than 300 ?m and are composed of a crosslinked multi-component copolymer having conjugated diene units, non-conjugated olefin units and aromatic vinyl units; and (ii) a thermoplastic resin. The conjugated diene units include butadiene units, the non-conjugated olefin units include units selected from the group consisting of ethylene, propylene and 1-butene units, the aromatic vinyl units include styrene units, and the content of the conjugated diene units in the multi-component copolymer is 5 wt % or more. This golf ball material is soft, has an excellent rebound resilience and also has a good processability.

Abstract: In a golf ball having a two-layer core which includes an inner core layer and an outer core layer and having a cover of one or more layer, the outer core layer is formed of an elastomer composition that includes specific amounts of (A) polybutadiene having a 1,2-bond content of 50 to 95%, (B) a photocurable monomer, oligomer or polymer, and (C) a photopolymerizable initiator. The outer core layer has a thickness of from 1.0 to 4.0 mm, and the two-layer core has a surface hardness on the JIS-C scale of from 75 to 95. The ball is provided with a hardness gradient at the core interior, which lowers the spin rate of the ball, has an improved durability to cracking, and production costs for the outer core layer are kept relatively low.

Abstract: A golf ball material contains (I) a multi-component copolymer having conjugated diene units, non-conjugated olefin units and aromatic vinyl units; and (II) a binary copolymer of an olefin and an ?,?-unsaturated carboxylic acid of 3 to 8 carbons and/or a ternary copolymer of an olefin, an ?,?-unsaturated carboxylic acid of 3 to 8 carbons and an ester of the ?,?-unsaturated carboxylic acid, or a metal neutralization product thereof. The conjugated diene units include butadiene units, the non-conjugated olefin units include units selected from the group consisting of ethylene, propylene and 1-butene units, and the aromatic vinyl units include styrene units. The content of the conjugated diene units in the multi-component copolymer (I) is 5 wt % or more. This golf ball material is soft and has an excellent rebound resilience. Golf balls which use this material in the cover provide golfers with a competitive edge.

Abstract: In a golf ball having a rubber core and an intermediate layer and outermost layer which encase the core, the intermediate layer is formed of a thermoplastic resin composition which has a flexural rigidity of 400 to 500 MPa and a melt flow rate of 15 g/10 min or less and includes 50 to 100 wt % of a magnesium salt of an ethylenically unsaturated carboxylic acid copolymer, the outermost layer is formed of a polyurethane resin composition having a Shore D material hardness of 55 or less, and the golf ball has a deflection within a given range. Compared with conventional golf balls containing the high-rigidity ionomer resins hitherto used as intermediate layer materials, this ball suppresses the spin rate on shots with a driver and long and middle irons, enabling an increased distance to be obtained, and also has a high durability to repeated impact.

Abstract: A resin composition for golf balls includes (a) an acid-containing copolymer having an amount of acid constituent per 100 wt % of the sum of monomer units in the copolymer that is from 1 to 30 wt %, and (b) an amine-containing polymer having a branched structure. The resin composition imparts golf balls with an excellent rebound resilience and also confers an outstanding durability to repeated impact and an outstanding scuff resistance, making it particularly useful as a cover material in golf balls.

Abstract: A rubber composition for golf balls includes (A) a base rubber, (B) an acrylate ester or methacrylate ester containing an isocyanate group or a blocked isocyanate group, (C) diacrylic acid, dimethacrylic acid or a metal salt thereof, and (D) an organic peroxide. In a golf ball having a core formed of the rubber composition and a cover of one or more layers which encases the core, the rubber composition exhibits a spin rate-lowering effect on shots and can thus improve the flight performance of the ball.

Abstract: A golf ball resin composition includes (a) an olefin-?,?-unsaturated carboxylic acid copolymer and/or a metal ion neutralization product thereof or an olefin-?,?-unsaturated carboxylic acid-?,?-unsaturated carboxylic acid ester copolymer and/or a metal ion neutralization product thereof, (b) a phenolic resin and (c) a compound having at least two oxazoline groups per molecule, wherein the content of component (C) is from 0.1 to 5 parts by weight per 100 parts by weight of components (a) and (b) combined. The resin composition has excellent tensile properties and, when used in a golf ball, provides the ball with an excellent durability without lowering the spin performance and distance performance of the ball. The resin is especially useful as a golf ball cover material for an outermost layer or an intermediate layer.

Abstract: In a golf ball having a rubber core and an intermediate layer and outermost layer which encase the core, the intermediate layer is formed of a thermoplastic resin composition which has a flexural rigidity of 400 to 500 MPa and a melt flow rate of 15 g/10 min or less and includes 50 to 100 wt % of a magnesium salt of an ethylenically unsaturated carboxylic acid copolymer, the outermost layer is formed of a polyurethane resin composition having a Shore D material hardness of 55 or less, and the golf ball has a deflection within a given range. Compared with conventional golf balls containing the high-rigidity ionomer resins hitherto used as intermediate layer materials, this ball suppresses the spin rate on shots with a driver and long and middle irons, enabling an increased distance to be obtained, and also has a high durability to repeated impact.

Abstract: In a golf ball having a two-layer core which includes an inner core layer and an outer core layer and having a cover of one or more layer, the outer core layer is formed of an elastomer composition that includes specific amounts of (A) polybutadiene having a 1,2-bond content of 50 to 95%, (B) a photocurable monomer, oligomer or polymer, and (C) a photopolymerizable initiator. The outer core layer has a thickness of from 1.0 to 4.0 mm, and the two-layer core has a surface hardness on the JIS-C scale of from 75 to 95. The ball is provided with a hardness gradient at the core interior, which lowers the spin rate of the ball, has an improved durability to cracking, and production costs for the outer core layer are kept relatively low.

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: A matte colored golf ball which is free of luster and gloss has a good appearance in which injection marks that form during injection molding of a cover layer—be it an intermediate layer or an outermost layer—are difficult to see and scuffing on the cover surface is inconspicuous. The golf ball includes a core, an outermost layer, an intermediate layer therebetween, and a coat formed on the surface of the outermost layer. The intermediate layer is formed of a resin composition containing a thermoplastic resin and a colorant consisting of a fluorescent dye or a fluorescent pigment and has a specific visible light transmittance, the outermost layer is molded of a transparent or translucent resin composition that is free of fluorescent dye, and the coat is formed of a urethane-based coating composition containing delustering particles.

Abstract: A matte golf ball which is free of luster and gloss has such a good ball appearance that the injection marks which form during injection molding of the cover are not visible. The golf ball includes a core of at least one layer, a cover of at least one layer, and a paint film. The outermost layer of the cover is formed of a resin composition which includes a thermoplastic resin and a colorant comprising a fluorescent dye or a fluorescent pigment, and has a visible light transmittance with an average value at wavelengths in the 380 to 780 nm spectrum of from 2.0 to 50.0%. The paint film is formed of a urethane-based paint composition containing delustering particles.

Abstract: A golf ball resin composition includes (a) an olefin-?,?-unsaturated carboxylic acid copolymer and/or a metal ion neutralization product thereof or an olefin-?,?-unsaturated carboxylic acid-?,?-unsaturated carboxylic acid ester copolymer and/or a metal ion neutralization product thereof, (b) a phenolic resin and (c) a compound having at least two oxazoline groups per molecule, wherein the content of component (C) is from 0.1 to 5 parts by weight per 100 parts by weight of components (a) and (b) combined. The resin composition has excellent tensile properties and, when used in a golf ball, provides the ball with an excellent durability without lowering the spin performance and distance performance of the ball. The resin is especially useful as a golf ball cover material for an outermost layer or an intermediate layer.

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.