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公开(公告)号：US12109458B2
公开(公告)日：2024-10-08
申请号：US17471713
申请日：2021-09-10
Applicant: Sumitomo Rubber Industries, Ltd.
Inventor： Takumi Kaneko , Takahiro Shigemitsu , Kazuyoshi Shiga
IPC: A63B37/00 , C08F283/00 , C08G18/04 , C08G18/42 , C08G18/48 , C08G18/66 , C08G18/73 , C08G18/75 , C08J7/056 , C08J7/16 , C08J7/18 , C09D175/04 , C09D175/08 , C08G18/12
CPC classification number: A63B37/00221 , A63B37/00222 , C08F283/00 , C08G18/04 , C08G18/4244 , C08G18/4854 , C08G18/6677 , C08G18/73 , C08G18/755 , C08J7/056 , C08J7/16 , C08J7/18 , C09D175/04 , C09D175/08 , C08G18/12 , C08G18/10 , C08G18/792 , C08G18/10 , C08G18/7831 , C08G18/10 , C08G18/725
Abstract: An object of the present invention is to provide a golf ball having oily stain washability or weed juice stain resistance that is adjustable depending on a temperature. The present invention provides a golf ball comprising a golf ball body and a paint film composed of at least one layer and covering the golf ball body, wherein a molecular chain of a base resin constituting an outermost layer located at an outermost side of the paint film has a graft chain, and 80 mole % or more of repeating units constituting the graft chain includes any one of repeating units represented by formulae (1) to (4):
[In the formulae (1) to (4), R1 to R5 each independently represent hydrogen, halogen or an organic group.].-
公开(公告)号：US10888738B2
公开(公告)日：2021-01-12
申请号：US15968465
申请日：2018-05-01
Applicant: Sumitomo Rubber Industries, Ltd.
Inventor： Kazuyoshi Shiga , Hiroshi Tadaoka , Masanori Taguchi , Takahiro Shigemitsu
Abstract: 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 rebound resilience and shot feeling. 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, (a-2) a binary ionomer resin, (a-3) a ternary copolymer, and (a-4) a ternary ionomer resin, (B) a saturated fatty acid, and (C) an unsaturated fatty acid, wherein a total content of (B) the saturated fatty acid and (C) the unsaturated fatty acid ranges from 100 parts by mass to 200 parts by mass with respect to 100 parts by mass of (A) the resin component.
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公开(公告)号：US10376742B2
公开(公告)日：2019-08-13
申请号：US15260497
申请日：2016-09-09
Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
Inventor： Hikaru Nagakura , Kazuyoshi Shiga , Chiemi Mikura , Takahiro Shigemitsu , Ryota Sakamine
IPC: A63B37/02 , C08K5/09 , C08K5/098 , C08L9/00 , A63B37/00 , C08K3/30 , C08K5/092 , C08K5/14 , C08K3/22 , C08K5/372
Abstract: An object of the present invention is to provide a golf ball having an excellent flight performance on driver shots. The present invention provides a golf ball comprising a spherical core and at least one cover covering the spherical core, wherein the spherical core is formed from a rubber composition containing (a) 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) an unsaturated fatty acid and/or a metal salt thereof excluding an α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms and/or a metal salt thereof, and provided that the rubber composition further contains (f) a metal compound if only an α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms is present as (b) the co-crosslinking agent.
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公开(公告)号：US12220616B2
公开(公告)日：2025-02-11
申请号：US18137589
申请日：2023-04-21
Applicant: Sumitomo Rubber Industries, Ltd.
Inventor： Ayaka Shindo , Takahiro Shigemitsu , Kazuyoshi Shiga , Toshiyuki Tarao , Takanobu Kawamura
Abstract: An object of the present disclosure is to provide a golf ball having good shot feeling and excellent durability while having non-lowered resilience. The present disclosure provides a golf ball comprising a spherical core and one or more cover layers disposed outside the spherical core, wherein at least one layer of the cover layers contains (A) a base resin and (B) a polyethylene oxide.
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公开(公告)号：US11707648B2
公开(公告)日：2023-07-25
申请号：US17497213
申请日：2021-10-08
Applicant: Sumitomo Rubber Industries, Ltd.
Inventor： Yasuo Naito , Masayuki Onishi , Kazuyoshi Shiga , Takahiro Shigemitsu
CPC classification number: A63B37/00221 , A63B37/00222
Abstract: An object of the present invention is to provide a novel golf ball having excellent spin performance on approach shots. The present invention provides a golf ball comprising a golf ball body, and a paint film formed on a surface of the golf ball body and composed of at least one layer, wherein a base resin constituting an outermost layer of the paint film includes a polyurethane, and the polyurethane has a loss elastic modulus (E″) of 0.2×108 Pa or more at −50° C. and a loss tangent (tan δ) having a peak temperature of 0° C. or less, obtained by measuring dynamic viscoelasticity of the polyurethane under specific conditions.
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Patent Agency Ranking
公开(公告)号：US11214546B2
公开(公告)日：2022-01-04
申请号：US17124919
申请日：2020-12-17
Applicant: Sumitomo Rubber Industries, Ltd.
Inventor： Takumi Kaneko , Takahiro Shigemitsu , Kazuyoshi Shiga
IPC: C07D231/12
Abstract: An object of the present invention is to provide a dithioester compound capable of generating an alkoxy radical having high hydrogen abstraction ability. The present invention provides a dithioester compound represented by a formula (1). The dithioester compound according to the present invention is capable of generating an alkoxy radical (R1R2R3CO.) having high hydrogen abstraction ability. Thus, the dithioester compound according to the present invention can be suitably used as an additive (RAFT agent) when synthesizing a polymer material having a crosslinked structure. [In the formula (1), R1 to R3 each independently represent an alkyl group having 1 or more carbon atoms, an alkenyl group having two or more carbon atoms, an alkynyl group having two or more carbon atoms, a hydrogen atom, or a halogen atom.]
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公开(公告)号：US11358033B2
公开(公告)日：2022-06-14
申请号：US16869991
申请日：2020-05-08
Applicant: Sumitomo Rubber Industries, Ltd.
Inventor： Hikaru Nagakura , Kazuyoshi Shiga , Kai Hayashi , Takahiro Shigemitsu
Abstract: An object of the present invention is to provide a golf ball having excellent durability. The present invention provides a golf ball comprising a core and at least one cover layer covering the core, wherein the core is formed from a core rubber composition containing (a) 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 hindered phenol compound, and (b) the co-crosslinking agent and (d) the hindered phenol compound are blended in the core rubber composition such that the following expression (1) is satisfied: 0.04≤HF/B≤0.35 (1) in the formula (1), HF=a number of OH functional group in one molecule of (d) the hindered phenol compound×an amount of (d) the hindered phenol compound (mole) with respect to 100 parts by mass of (a) the base rubber, and B=an amount of (b) the co-crosslinking agent (mole) with respect to 100 parts by mass of (a) the base rubber.
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公开(公告)号：US10661124B2
公开(公告)日：2020-05-26
申请号：US16106411
申请日：2018-08-21
Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
Inventor： Kazuyoshi Shiga , Masanori Taguchi , Takahiro Shigemitsu , Hiroshi Tadaoka
IPC: A63B37/00 , C08L23/08 , C08K7/04 , C08K9/04 , C08K5/17 , C08K5/09 , C08K3/22 , C08K3/36 , C08K7/02 , C08K3/04 , C08K3/08
Abstract: An object of the present invention is to provide a golf ball exhibiting an excellent shot feeling and resilience, and a constituent material thereof. The present invention provides a golf ball resin composition having a bending stiffness (M3-12) ranging from 300 kgf/cm2 to 24,000 kgf/cm2 at a bending angle from 3° to 12°, a ratio (M3-12/M24-30) of the bending stiffness (M3-12) at the bending angle from 3° to 12° to a bending stiffness (M24-30) at a bending angle from 24° to 30° ranging from 0.20 to 2.00, and a slab hardness ranging from 30 to 65 in Shore D hardness.
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公开(公告)号：US20190076704A1
公开(公告)日：2019-03-14
申请号：US16113828
申请日：2018-08-27
Applicant: Sumitomo Rubber Industries, Ltd.
Inventor： Takahiro Shigemitsu
Abstract: An object of the present invention is to provide a golf ball resin composition by which durability can be improved without substantially reducing hardness and resilience, and a golf ball using the same. The present invention provides a golf ball resin composition containing (A) at least one member selected from the group consisting of an ionomer resin, a polyamide and a styrene-based elastomer, and (B) an acid modified polyolefin having a weight average molecular weight in a range from 5,000 to 80,000.
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公开(公告)号：US11794078B2
公开(公告)日：2023-10-24
申请号：US17520864
申请日：2021-11-08
Applicant: Sumitomo Rubber Industries, Ltd.
Inventor： Hikaru Nagakura , Kazuyoshi Shiga , Kai Hayashi , Takahiro Shigemitsu
CPC classification number: A63B37/0051 , A63B37/0063 , A63B37/0065 , A63B37/0074 , C08L9/00 , C08L2207/53 , C08L2312/00
Abstract: An object of the present invention is to provide a golf ball having excellent shot feeling while maintaining the resilience performance on driver shots. The present invention provides a golf ball comprising a core and at least one cover covering the core, wherein the core is formed from a core rubber composition containing (a) 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 monophenol compound having a substituent group only at p-position.
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