Patents by Inventor Ayaka SHINDO
Ayaka SHINDO has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11975242Abstract: An object of the present disclosure is to provide a golf ball having good shot feeling and excellent durability and not having lowered resilience even if a hard cover material is used. The present disclosure provides a golf ball comprising a spherical core, and a cover disposed outside the spherical core and composed of one or more layers, wherein at least one cover layer contains (A) a base resin, and (B) at least one member selected from the group consisting of a polyrotaxane, a polyethylene oxide, a polypropylene oxide, a polycaprolactone and a liquid polymer, and Sa×Spc?100 wherein Sa (?m) is an arithmetic mean roughness of a surface of a cut plane of the cover, and Spc (mm?1) is an arithmetic mean curvature of a summit of the surface of the cut plane of the cover.Type: GrantFiled: December 8, 2022Date of Patent: May 7, 2024Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Ayaka Shindo, Takahiro Shigemitsu, Kazuyoshi Shiga, Toshiyuki Tarao, Takanobu Kawamura
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Publication number: 20240132705Abstract: An object of the present disclosure is to provide a rubber composition from which a crosslinked rubber molded product having excellent resilience performance can be obtained. The present disclosure provides a rubber composition containing (a) a base rubber, (b) a co-crosslinking agent, and (c) a crosslinking initiator, wherein (b) the co-crosslinking agent includes (b1) a metal complex, and (b1) the metal complex is composed of (b11) a metal component, (b12) a ligand derived from an ?,?-unsaturated carboxylic acid compound having 3 to 8 carbon atoms, and (b13) a ligand derived from a mercaptobenzothiazole-based compound.Type: ApplicationFiled: October 6, 2023Publication date: April 25, 2024Applicant: Sumitomo Rubber Industries, Ltd.Inventors: Ayaka SHINDO, Takumi KANEKO, Hiroshi TADAOKA, Kazuyoshi SHIGA
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Publication number: 20230338781Abstract: 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.Type: ApplicationFiled: April 21, 2023Publication date: October 26, 2023Applicant: Sumitomo Rubber Industries, Ltd.Inventors: Ayaka SHINDO, Takahiro SHIGEMITSU, Kazuyoshi SHIGA, Toshiyuki TARAO, Takanobu KAWAMURA
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Publication number: 20230312878Abstract: An object of the present disclosure is to provide a rubber composition from which a crosslinked rubber molded product having good softness and excellent resilience performance can be obtained. The present disclosure provides a rubber composition containing (a) a base rubber, (b) a co-crosslinking agent, (c) a crosslinking initiator, and (d) an organic sulfur compound, wherein (d) the organic sulfur compound includes (d1) a compound represented by the formula (1) and/or (d2) a compound represented by the formula (2).Type: ApplicationFiled: March 28, 2023Publication date: October 5, 2023Applicant: Sumitomo Rubber Industries, Ltd.Inventors: Takumi KANEKO, Hiroshi TADAOKA, Ayaka SHINDO, Kazuyoshi SHIGA
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Publication number: 20230201670Abstract: An object of the present disclosure is to provide a golf ball having good shot feeling and excellent durability and not having lowered resilience even if a hard cover material is used. The present disclosure provides a golf ball comprising a spherical core, and a cover disposed outside the spherical core and composed of one or more layers, wherein at least one cover layer contains (A) a base resin, and (B) at least one member selected from the group consisting of a polyrotaxane, a polyethylene oxide, a polypropylene oxide, a polycaprolactone and a liquid polymer, and Sa×Spc?100 wherein Sa (?m) is an arithmetic mean roughness of a surface of a cut plane of the cover, and Spc (mm?1) is an arithmetic mean curvature of a summit of the surface of the cut plane of the cover.Type: ApplicationFiled: December 8, 2022Publication date: June 29, 2023Applicant: Sumitomo Rubber Industries, Ltd.Inventors: Ayaka SHINDO, Takahiro SHIGEMITSU, Kazuyoshi SHIGA, Toshiyuki TARAO, Takanobu KAWAMURA
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Publication number: 20230114853Abstract: An object of the present disclosure is to provide a rubber composition from which a crosslinked rubber molded product having good softness and excellent resilience performance can be obtained. The present disclosure provides a rubber composition containing (a) a base rubber, (b) a co-crosslinking agent, (c) a crosslinking initiator, and (d) an organic sulfur compound, wherein (d) the organic sulfur compound includes (d1) a polythiophene compound having two or more thiophene rings in the molecule.Type: ApplicationFiled: October 12, 2022Publication date: April 13, 2023Applicant: Sumitomo Rubber Industries, Ltd.Inventors: Takumi KANEKO, Hiroshi TADAOKA, Ayaka SHINDO, Kazuyoshi SHIGA
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Patent number: 11565154Abstract: An object of the present invention is to provide a golf ball having a decreased spin rate on driver shots. The present invention provides a golf ball comprising a spherical core and at least one cover layer covering the spherical core, wherein the spherical core is formed from a rubber composition containing (a) a base rubber, (b) a compound represented by the formula (1) as a co-crosslinking agent, and (c) a crosslinking initiator, (R1COO)M(OCOR2)m??(1) in the formula (1), M represents a metal atom, m represents 1 or 2, R1 and R2 are different from each other, represent an alkenyl group having 2 to 30 carbon atoms or an alkynyl group having 2 to 30 carbon atoms and have a carbon-carbon double bond or a carbon-carbon triple bond at an ?-position carbon atom bonding to the carbonyl group, and when m is 2, two of R2 may be identical to or different from each other.Type: GrantFiled: August 13, 2020Date of Patent: January 31, 2023Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Ayaka Shindo, Takumi Kaneko, Hiroshi Tadaoka, Takahiro Shigemitsu, Kazuyoshi Shiga
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Patent number: 11554295Abstract: An object of the present invention is to provide a golf ball having a decreased spin rate on driver shots. The present invention provides a golf ball comprising a spherical core and at least one cover layer covering the spherical core, wherein the spherical core is formed from a rubber composition containing (a) a base rubber, (b) two or more ?,?-unsaturated carboxylic acids having 3 to 14 carbon atoms and having no substituent group at a carbon atom bonding to the carboxy group, and/or a metal salt thereof, and (c) a crosslinking initiator.Type: GrantFiled: August 13, 2020Date of Patent: January 17, 2023Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Ayaka Shindo, Takumi Kaneko, Hiroshi Tadaoka, Takahiro Shigemitsu, Kazuyoshi Shiga
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Patent number: 11185742Abstract: An object of the present invention is to provide a golf ball having excellent resilience performance. The present invention provides a golf ball comprising a constituent member, wherein at least a part of the constituent member is formed from a rubber composition containing (a) a base rubber, (b) a co-crosslinking agent, (c) a crosslinking initiator, and (d) an organic sulfur compound, wherein (d) the organic sulfur compound contains at least one member selected from the group consisting of a thiophenol having a halogenated sulfanyl group, a metal salt of a thiophenol having a halogenated sulfanyl group, and a diphenyl disulfide having a halogenated sulfanyl group.Type: GrantFiled: October 29, 2019Date of Patent: November 30, 2021Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Ayaka Shindo, Takumi Kaneko, Hiroshi Tadaoka, Kazuyoshi Shiga
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Publication number: 20210086036Abstract: An object of the present invention is to provide a golf ball having a decreased spin rate on driver shots. The present invention provides a golf ball comprising a spherical core and at least one cover layer covering the spherical core, wherein the spherical core is formed from a rubber composition containing (a) a base rubber, (b) a compound represented by the formula (1) as a co-crosslinking agent, and (c) a crosslinking initiator, (R1COO)M(OCOR2)m??(1) in the formula (1), M represents a metal atom, m represents 1 or 2, R1 and R2 are different from each other, represent an alkenyl group having 2 to 30 carbon atoms or an alkynyl group having 2 to 30 carbon atoms and have a carbon-carbon double bond or a carbon-carbon triple bond at an ?-position carbon atom bonding to the carbonyl group, and when m is 2, two of R2 may be identical to or different from each other.Type: ApplicationFiled: August 13, 2020Publication date: March 25, 2021Applicant: Sumitomo Rubber Industries, Ltd.Inventors: Ayaka SHINDO, Takumi KANEKO, Hiroshi TADAOKA, Takahiro SHIGEMITSU, Kazuyoshi SHIGA
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Publication number: 20210086035Abstract: An object of the present invention is to provide a golf ball having a decreased spin rate on driver shots. The present invention provides a golf ball comprising a spherical core and at least one cover layer covering the spherical core, wherein the spherical core is formed from a rubber composition containing (a) a base rubber, (b) two or more ?,?-unsaturated carboxylic acids having 3 to 14 carbon atoms and having no substituent group at a carbon atom bonding to the carboxy group, and/or a metal salt thereof, and (c) a crosslinking initiator.Type: ApplicationFiled: August 13, 2020Publication date: March 25, 2021Applicant: Sumitomo Rubber Industries, Ltd.Inventors: Ayaka SHINDO, Takumi KANEKO, Hiroshi TADAOKA, Takahiro SHIGEMITSU, Kazuyoshi SHIGA
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Publication number: 20200129813Abstract: An object of the present invention is to provide a golf ball having excellent resilience performance. The present invention provides a golf ball comprising a constituent member, wherein at least a part of the constituent member is formed from a rubber composition containing (a) a base rubber, (b) a co-crosslinking agent, (c) a crosslinking initiator, and (d) an organic sulfur compound, wherein (d) the organic sulfur compound contains at least one member selected from the group consisting of a thiophenol having a halogenated sulfanyl group, a metal salt of a thiophenol having a halogenated sulfanyl group, and a diphenyl disulfide having a halogenated sulfanyl group.Type: ApplicationFiled: October 29, 2019Publication date: April 30, 2020Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Ayaka Shindo, Takumi Kaneko, Hiroshi Tadaoka, Kazuyoshi Shiga
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Patent number: 10265585Abstract: An object of the present invention is to provide a golf ball excellent in flying performance, in particular, to provide a golf ball traveling a great flight distance. The present invention provides a golf ball having a spherical core and at least one cover layer covering the spherical core, wherein the spherical core is formed from a rubber composition containing (a) a base rubber, (b) an ?,?-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 (d1) an aromatic carboxylic acid or (d2) an aromatic carboxylic acid salt, provided that the rubber composition further contains (e) a metal compound in the case of containing only (b) the ?,?-unsaturated carboxylic acid having 3 to 8 carbon atoms as the co-crosslinking agent.Type: GrantFiled: October 17, 2016Date of Patent: April 23, 2019Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Chiemi Mikura, Kazuhisa Fushihara, Mikio Yamada, Shun Kurihara, Ayaka Shindo
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Patent number: 10232224Abstract: An object of the present invention is to provide a golf ball having excellent resilience performance. The present invention provides a golf ball having a spherical core and at least one cover layer, wherein the spherical core is formed from a rubber composition containing (a) a base rubber, (b) an ?,?-unsaturated carboxylic acid having 3 to 8 carbon atoms and/or a metal salt thereof as a co-crosslinking agent, and (c) a crosslinking initiator, provided that the rubber composition further contains (d) a metal compound in the case of containing only (b) the ?,?-unsaturated carboxylic acid having 3 to 8 carbon atoms as the co-crosslinking agent, wherein (c) the crosslinking initiator includes a peroxy ketal represented by the formula (1), and substituents represented by R1 and R2 have a bond dissociation energy of 435 KJ/mol or more.Type: GrantFiled: May 30, 2017Date of Patent: March 19, 2019Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Ayaka Shindo, Hiroshi Tadaoka, Chiemi Mikura, Kazuyoshi Shiga
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Patent number: 9975007Abstract: An object of the present invention is to provide a golf ball showing a great flight distance on driver shots. The present invention provides a golf ball comprising a spherical core and at least one cover layer covering the spherical core, wherein the spherical core has a difference between absorbance of the absorption peak appeared at 1560±30 cm?1 at a surface thereof and absorbance of the absorption peak appeared at 1560±30 cm?1 at a center thereof of 0.024 or more, when measuring the spherical core with a Fourier transform infrared spectrophotometer.Type: GrantFiled: August 23, 2012Date of Patent: May 22, 2018Assignee: DUNLOP SPORTS CO., LTD.Inventors: Ayaka Shindo, Chiemi Mikura, Shun Kurihara, Kazuhisa Fushihara
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Patent number: 9873022Abstract: An object of the present invention is to provide a golf ball having a low spin rate on driver shots. The present invention provides a golf ball comprising a spherical core and at least one cover layer covering the spherical core, wherein the spherical core is formed from a rubber composition containing (a) base rubber, (b) an ?,?-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 carboxylic acid having a benzene ring and/or a salt thereof, provided that the rubber composition further contains (e) a metal compound in case of containing only (b) the ?,?-unsaturated carboxylic acid having 3 to 8 carbon atoms as the co-crosslinking agent.Type: GrantFiled: September 22, 2015Date of Patent: January 23, 2018Assignee: DUNLOP SPORTS CO. LTD.Inventors: Ryota Sakamine, Chiemi Mikura, Shun Kurihara, Ayaka Shindo
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Patent number: 9855467Abstract: An object of the present invention is to provide a golf ball showing a great flight distance on driver shots. The present invention provides a golf ball comprising a spherical core and at least one cover layer covering the spherical core, wherein when JIS-C hardness of the spherical core is measured at points located at distances of 0% (core center), 37.5%, 75.0% and 100% (core surface) from the core center of the spherical core, a hardness difference (Hs?Ho) between a surface hardness (Hs) thereof and a center hardness (Ho) thereof is 20 or more, a ratio ((H37.5?Ho)/(H75.0?Ho)) of a hardness difference (H37.5?Ho) to a hardness difference (H75.0?Ho) is 0.6 or less, and a compression deformation amount (D (mm)) of the spherical core and the 37.5% point hardness (H37.5) satisfy a relation of H37.5??9×D+95.Type: GrantFiled: May 30, 2014Date of Patent: January 2, 2018Assignee: DUNLOP SPORTS CO. LTD.Inventors: Ayaka Shindo, Chiemi Mikura, Ryota Sakamine, Sho Goji
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Publication number: 20170340924Abstract: An object of the present invention is to provide a golf ball having excellent resilience performance. The present invention provides a golf ball having a spherical core and at least one cover layer, wherein the spherical core is formed from a rubber composition containing (a) a base rubber, (b) an ?,?-unsaturated carboxylic acid having 3 to 8 carbon atoms and/or a metal salt thereof as a co-crosslinking agent, and (c) a crosslinking initiator, provided that the rubber composition further contains (d) a metal compound in the case of containing only (b) the ?,?-unsaturated carboxylic acid having 3 to 8 carbon atoms as the co-crosslinking agent, wherein (c) the crosslinking initiator includes a peroxy ketal represented by the formula (1), and substituents represented by R1 and R2 have a bond dissociation energy of 435 KJ/mol or more.Type: ApplicationFiled: May 30, 2017Publication date: November 30, 2017Applicant: Dunlop Sports Co. Ltd.Inventors: Ayaka SHINDO, Hiroshi TADAOKA, Chiemi MIKURA, Kazuyoshi SHIGA
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Patent number: 9694243Abstract: An object of the present invention is to provide a golf ball showing a low spin rate on driver shots and an excellent shot feeing. The present invention provides a golf ball having 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 ?,?-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 at least one compound of (d) mercaptobenzoic acids and/or salts thereof, provided that the rubber composition further contains (e) a metal compound in the case of containing only (b) the ?,?-unsaturated carboxylic acid having 3 to 8 carbon atoms as the co-crosslinking agent, and the spherical core has a hardness difference (Hs?Ho) between a surface hardness (Hs) and a center hardness (Ho) thereof of 20 or more in JIS-C hardness.Type: GrantFiled: August 29, 2014Date of Patent: July 4, 2017Assignee: DUNLOP SPORTS CO. LTD.Inventors: Chiemi Mikura, Ayaka Shindo, Mikio Yamada
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Patent number: 9586094Abstract: A method for manufacturing a golf ball showing a great flight distance on driver shots for includes the steps of: preparing a rubber composition containing a base rubber, an ?,?-unsaturated carboxylic acid having 3 to 8 carbon atoms and/or a metal salt thereof as a co-crosslinking agent, a crosslinking initiator and a carboxylic acid and/or a salt thereof; heat pressing the rubber composition at a press temperature ranging from t-40° C. to t-15° C. to mold a spherical core, wherein t ° C. is a one-minute half-life temperature of the crosslinking initiator; and forming at least one cover layer covering the spherical core.Type: GrantFiled: May 30, 2014Date of Patent: March 7, 2017Assignee: DUNLOP SPORTS CO. LTD.Inventors: Ayaka Shindo, Chiemi Mikura, Ryota Sakamine, Sho Goji