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公开(公告)号：US11608434B2
公开(公告)日：2023-03-21
申请号：US17341639
申请日：2021-06-08
发明人： Atsushi Namba
摘要： 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.
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公开(公告)号：US11577128B2
公开(公告)日：2023-02-14
申请号：US17124567
申请日：2020-12-17
发明人： Jun Shindo
摘要： In a golf ball having a core composed of one or more layer, the outermost layer of the core is formed of a rubber composition containing an α,β-unsaturated metal carboxylate, and an envelope layer directly encasing the core is formed of a resin composition containing a thermoplastic resin having a structure that includes α,β-ethylenically unsaturated carboxylic acid copolymerization units. The infrared absorption spectra at surface sites on the outermost layer of the core, as measured by ATR FT-IR spectroscopy, satisfy a specific condition. The ball has an enhanced adhesion between the rubber-based core and the adjacent cover layer that is formed of an ionomer resin or other α,β-ethylenically unsaturated carboxylic acid copolymer-containing resin material.
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公开(公告)号：US20230034653A1
公开(公告)日：2023-02-02
申请号：US17862890
申请日：2022-07-12
发明人： Hideo WATANABE
IPC分类号： A63B37/00
摘要： In a golf ball having a core and a cover, the cover is formed primarily of polyurethane, dimples formed on the cover have a volume occupancy ratio VR of from 0.80 to 0.92%, the ball has a weight of not more than 45.0 g and, in an impact test carried out by hitting the ball with a driver at a head speed of 40 m/s, the sum t1+t2 of the time t1 required from initial contact by the driver with the ball for deformation of the ball to reach a maximum and the time t2 required from the state of maximum ball deformation for the ball and driver to separate is not more than 660 μsec. This golf ball makes it possible for golfers who have a high head speed and ordinary golfers who do not to compete without relying excessively on superiority in terms of distance.
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公开(公告)号：US20220389211A1
公开(公告)日：2022-12-08
申请号：US17830910
申请日：2022-06-02
发明人： Masahiro YAMABE
摘要： In a golf ball having a core of at least one layer and a cover of at least one layer encasing the core, at least one layer of the cover is formed of a resin composition which includes (I) a polyurethane or a polyurea, (II) a thermoplastic polyester elastomer and (III) an aromatic vinyl elastomer. The thermoplastic polyester elastomer serving as component (II) and the aromatic vinyl elastomer serving component (III) have specific respective contents and properties, including Shore D hardnesses and rebound resiliences. The golf ball has an excellent controllability on approach shots without a loss of distance on driver shots. In addition, the scuff resistance and moldability are good.
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公开(公告)号：US11511162B2
公开(公告)日：2022-11-29
申请号：US17376227
申请日：2021-07-15
发明人： Hirotaka Shinohara
摘要： A golf ball having a cover with a plurality of dimples on the surface thereof is provided with a coat of mutually differing properties on dimple areas of the surface and on land areas between the dimples. The land areas are formed with a coat having a high coefficient of friction and the dimple areas have a surface energy of not more than 32 dynes, enabling a lower spin rate to be achieved and thus increasing the distance traveled by the ball, particularly when struck with a middle iron, and also help impart a high spin rate and a good controllability on approach shots.
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公开(公告)号：US20220203175A1
公开(公告)日：2022-06-30
申请号：US17645606
申请日：2021-12-22
发明人： Jun SHINDO
摘要： A rubber composition for a golf ball core includes (a) a conjugated diene polymer, (b) a multi-component copolymer having conjugated diene units, non-conjugated olefin units and aromatic vinyl units, and (c) an organic peroxide. The conjugated diene units include butadiene units, the non-conjugated olefin units include ethylene units, and the aromatic vinyl units include styrene units. The content of conjugated diene units with respect to the multi-component copolymer is at least 5 wt %. Golf balls having at least one core layer formed of such a rubber composition and a cover of one or more layers encasing the core exhibit improved durability to cracking on repeated impact while maintaining the basic properties required of golf balls, such as flight and spin controllability on approach shots.
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公开(公告)号：US20220203174A1
公开(公告)日：2022-06-30
申请号：US17644828
申请日：2021-12-17
发明人： Jun SHINDO
IPC分类号： A63B37/00
摘要： A rubber composition for a golf ball core includes (a) a conjugated diene polymer, (b) a copolymer of a conjugated diene compound and a non-conjugated olefin, and (c) an organic peroxide. Golf balls having at least one core layer formed of such a rubber composition and a cover of one or more layers encasing the core exhibit improved durability to cracking on repeated impact while maintaining the basic properties required of golf balls, such as flight and spin controllability on approach shots.
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公开(公告)号：US20220176205A1
公开(公告)日：2022-06-09
申请号：US17680470
申请日：2022-02-25
发明人： Hideo WATANABE
IPC分类号： A63B37/00
摘要： In a golf ball having a core, envelope layer, intermediate layer and cover, the (core diameter)/(ball diameter) value falls within a particular range, the core has a specific hardness profile, and the Shore C hardness relationships among the core center and surface hardnesses and the surface hardnesses of the envelope layer-encased sphere, intermediate layer-encased sphere and ball satisfy the following conditions: core surface hardness ball surface hardness, (1) (surface hardness of envelope layer-encased sphere)−(core center hardness)≥28. (2) Also, the envelope layer, intermediate layer and cover have respective thicknesses which satisfy the condition: cover thickness
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公开(公告)号：US20220143472A1
公开(公告)日：2022-05-12
申请号：US17500546
申请日：2021-10-13
发明人： Hideo Watanabe , Masanobu Kuwahara
IPC分类号： A63B37/00
摘要： In a golf ball having a core, an envelope layer, an intermediate layer and a cover, the difference between the center hardness and the surface hardness of the core is set in a specific range, the intermediate layer is formed of a resin material that includes a high-acid ionomer, the Shore C hardness relationships among the core center and the surfaces of the envelope-encased layer and the intermediate layer-encased sphere satisfy specific conditions; and the ball has a deflection when compressed under a given load which is at least 2.7 mm. This ball achieves a good distance on shots with a driver, utility club or iron, is receptive to spin in the short game, and has a soft feel at impact on all shots, making it useful to amateur golfers.
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公开(公告)号：US11291887B2
公开(公告)日：2022-04-05
申请号：US17025280
申请日：2020-09-18
发明人： Hideo Watanabe , Atsushi Komatsu
摘要： In a golf ball having a core, an intermediate layer and a cover, the core is formed primarily of a base rubber and has a diameter set in a specific range, and the intermediate layer and cover are each formed of resin materials. The core has an internal hardness such that, regarding the hardness at the core center, the hardnesses at positions located at 2 mm intervals from the core center outward up to 16 mm and the core surface hardness, the hardness differences therebetween are set within a specific range. The ball surface hardness is set so as to be higher than the surface hardness of the intermediate layer-encased sphere. This ball achieves a satisfactory distance on full shots not only with a driver, but also with a long iron or a middle iron, in addition to which it has an excellent durability to repeated impact.
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