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公开(公告)号：US11247102B2
公开(公告)日：2022-02-15
申请号：US17097051
申请日：2020-11-13
Applicant: Bridgestone Sports Co., Ltd.
Inventor： Atsushi Namba , Yusuke Suzuki
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.
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公开(公告)号：US10888740B2
公开(公告)日：2021-01-12
申请号：US16687898
申请日：2019-11-19
Applicant: Bridgestone Sports Co., Ltd.
Inventor： Katsunobu Mochizuki , Masahiro Yamabe , Atsushi Namba
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.
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公开(公告)号：US10786707B2
公开(公告)日：2020-09-29
申请号：US16393446
申请日：2019-04-24
Applicant: Bridgestone Sports Co., Ltd.
Inventor： Atsushi Namba , Hirotaka Shinohara , Kae Iizuka
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.
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公开(公告)号：US20190388734A1
公开(公告)日：2019-12-26
申请号：US16393446
申请日：2019-04-24
Applicant: Bridgestone Sports Co., Ltd.
Inventor： Atsushi Namba , Hirotaka Shinohara , Kae Iizuka
IPC: A63B37/00
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.
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公开(公告)号：US20200001139A1
公开(公告)日：2020-01-02
申请号：US16444509
申请日：2019-06-18
Applicant: Bridgestone Sports Co., Ltd.
Inventor： Hirotaka Shinohara , Kae Iizuka , Atsushi Namba
IPC: A63B37/00 , C08L23/08 , C09D175/04 , C09D7/42
Abstract: A golf ball having a core of at least one layer is provided on the ball surface with a delustering particle-containing coating layer having an average surface roughness Ra of between 0.5 and 1.0. The golf ball is a matte ball that is free of luster and gloss and moreover can prevent a reduction in the ball spin rate on approach shots.
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Patent Agency Ranking
公开(公告)号：US11608434B2
公开(公告)日：2023-03-21
申请号：US17341639
申请日：2021-06-08
Applicant: Bridgestone Sports Co., Ltd.
Inventor： Atsushi Namba
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.
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公开(公告)号：US11123610B2
公开(公告)日：2021-09-21
申请号：US16689309
申请日：2019-11-20
Applicant: Bridgestone Sports Co., Ltd.
Inventor： Atsushi Namba
Abstract: A golf ball resin composition includes (a) an olefin-α,β-unsaturated carboxylic acid copolymer and/or a metal ion neutralization product thereof or an olefin-α,β-unsaturated carboxylic acid-α,β-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.
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公开(公告)号：US20210187359A1
公开(公告)日：2021-06-24
申请号：US17097051
申请日：2020-11-13
Applicant: Bridgestone Sports Co., Ltd.
Inventor： Atsushi Namba , Yusuke Suzuki
IPC: A63B37/00
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.
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公开(公告)号：US12226676B2
公开(公告)日：2025-02-18
申请号：US18102113
申请日：2023-01-27
Applicant: Bridgestone Sports Co., Ltd.
Inventor： Atsushi Namba , Shuto Fukasawa
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.
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公开(公告)号：US11904211B2
公开(公告)日：2024-02-20
申请号：US17749762
申请日：2022-05-20
Applicant: Bridgestone Sports Co., Ltd.
Inventor： Yuki Mizuno , Atsushi Namba
IPC: A63B37/06 , A63B37/00 , C08L23/08 , C08L77/02 , B29B7/90 , B29C45/00 , B29C45/16 , B29L31/54 , B29K101/12
CPC classification number: A63B37/0024 , B29B7/90 , B29C45/0001 , B29C45/16 , C08L23/083 , C08L77/02 , A63B2209/00 , B29K2101/12 , B29L2031/546 , C08L2312/00 , C08L2314/06
Abstract: A golf ball material contains (i) fine particles that have an average particle size of less than 300 μm 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.
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