Patents by Inventor Hiroshi TADAOKA
Hiroshi TADAOKA 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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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: 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: 20230135863Abstract: An object of the present disclosure is to provide a rubber composition containing an organic sulfur compound from which a molded product having a high hardness can be obtained. The present disclosure provides a rubber composition containing (a) a base rubber, (b) a co-crosslinking agent, (c) a crosslinking initiator, (d) a benzothiazole derivative, and (e) an organic sulfur compound, wherein (d) the benzothiazole derivative is a compound represented by the formula (1) and/or a compound represented by the formula (2). [R1 represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, an aryl group having 4 to 14 carbon atoms, or a metal atom, R2 to R5 are identical to or different from each other, and represent an electron-withdrawing group or a hydrogen atom, and at least one of R3 to R5 is an electron-withdrawing group.Type: ApplicationFiled: November 3, 2022Publication date: May 4, 2023Applicant: Sumitomo Rubber Industries, Ltd.Inventors: Hiroshi TADAOKA, Kazuyoshi SHIGA
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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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Publication number: 20230064604Abstract: An object of the present disclosure is to provide a rubber composition from which a molded product crosslinked in a short time and having high hardness 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) a benzothiazole compound, wherein (d) the benzothiazole compound is a specific benzothiazole compound, and a relationship of {(T2-T1)/(X-18)} ? 0.46 is satisfied, wherein X is an amount (parts by mass) of (b) the co-crosslinking agent with respect to 100 parts by mass of (a) the base rubber, T1 is a torque (N.m) at 35 seconds and T2 is a torque (N.m) at 45 seconds from a start of measuring the torque of the rubber composition when conducting a crosslinking test of the rubber composition at a temperature of 170° C.Type: ApplicationFiled: August 24, 2022Publication date: March 2, 2023Applicant: Sumitomo Rubber Industries, Ltd.Inventors: Hiroshi TADAOKA, Kazuyoshi SHIGA
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Publication number: 20230033200Abstract: 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) 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 benzothiazole derivative, and further comprising (e) a metal compound when (b) the co-crosslinking agent consists of the ?,?-unsaturated carboxylic acid having 3 to 8 carbon atoms, wherein (d) the benzothiazole derivative is a compound represented by the formula (1) and/or a compound represented by the formula (2).Type: ApplicationFiled: June 9, 2022Publication date: February 2, 2023Applicant: Sumitomo Rubber Industries, Ltd.Inventors: Hiroshi TADAOKA, Kazuyoshi SHIGA, Takahiro SHIGEMITSU
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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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Publication number: 20220411606Abstract: 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) a salt of a benzothiazole derivative, wherein (d) the salt of the benzothiazole derivative includes a compound represented by the formula (1) in which a sulfur atom S2 constituting a thiocarbonyl group has a Mulliken charge of ?0.190 or more. [In the formula (1), R1 to R4 are identical to or different from each other, and represent an electron-withdrawing group or a hydrogen atom, S1 and S2 represent a sulfur atom, X represents a cation component, n is an integer ranging from 1 to 4, and at least one of R1 to R4 bonding to the identical benzene ring is an electron-withdrawing group when n is 2 or more.Type: ApplicationFiled: June 9, 2022Publication date: December 29, 2022Applicant: Sumitomo Rubber Industries, Ltd.Inventors: Hiroshi TADAOKA, Kazuyoshi SHIGA, Takahiro SHIGEMITSU
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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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Patent number: 11034706Abstract: An object of the present invention is to provide a novel complex having at least one carbon-carbon double bond and/or carbon-carbon triple bond, and having at least one Diels-Alder reactive functional group such as tetrazine. The present invention provides a complex represented by a formula (1): [M4O(RCOO)6]p??(1) wherein in the formula (1), at least one of R is an alkenyl group having 2 to 18 carbon atoms or an alkynyl group having 2 to 18 carbon atoms, and at least one of R is a monovalent group represented by a structural formula (2), wherein in the structural formula (2), A1 to A4 each independently represent a nitrogen atom or a carbon atom, X1 represents a single bond or a divalent organic group, and R1 represents a hydrogen atom or a monovalent organic group.Type: GrantFiled: June 24, 2019Date of Patent: June 15, 2021Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Hiroshi Tadaoka, Chiemi Mikura, Kazuyoshi Shiga
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Patent number: 10975103Abstract: An object of the present invention is to provide a novel complex having at least two carbon-carbon double bonds and/or carbon-carbon triple bonds. The present invention provides a complex represented by a structural formula (2): [In the structural formula (2), M1 to M4 are identical to or different from each other and represent a metal atom, R1 to R6 are identical to or different from each other and represent a hydrogen atom, an alkyl group having 1 to 24 carbon atoms, an alkenyl group having 2 to 18 carbon atoms or an alkynyl group having 2 to 18 carbon atoms, at least two of R1 to R6 are the alkenyl group having 2 to 18 carbon atoms or the alkynyl group having 2 to 18 carbon atoms, and at least one of R1 to R6 is the alkyl group having 6 to 24 carbon atoms].Type: GrantFiled: June 24, 2019Date of Patent: April 13, 2021Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Hiroshi Tadaoka, Chiemi Mikura, 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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Patent number: 10926139Abstract: An object of the present invention is to provide a golf ball having excellent resilience. 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, and (b) a co-crosslinking agent containing (b1) a carboxylic acid represented by a structural formula (1) and/or a metal salt thereof. [In the formula (1), A1 to A4 each independently represents a nitrogen atom or a carbon atom. X1 represents a single bond or a divalent organic group. R1 represents a hydrogen atom or a monovalent organic group. It is noted that at least one of A1 to A4 is the carbon atom, and X1 and R1 bond to the carbon atom. n represents an integer of 0 to 3. When n is 2 or more, a plurality of R1 may be identical to or different from each other, and a plurality of R1 may bond to each other to form a ring structure.Type: GrantFiled: June 26, 2019Date of Patent: February 23, 2021Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Ryota Sakamine, Hiroshi Tadaoka, Chiemi Mikura, Kazuyoshi Shiga
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Patent number: 10888738Abstract: 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.Type: GrantFiled: May 1, 2018Date of Patent: January 12, 2021Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Kazuyoshi Shiga, Hiroshi Tadaoka, Masanori Taguchi, Takahiro Shigemitsu
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Patent number: 10661124Abstract: 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.Type: GrantFiled: August 21, 2018Date of Patent: May 26, 2020Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Kazuyoshi Shiga, Masanori Taguchi, Takahiro Shigemitsu, Hiroshi Tadaoka
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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: 10562919Abstract: An object of the present invention is to provide a novel complex having at least one carbon-carbon double bond and/or carbon-carbon triple bond. The present invention provides a complex represented by formula (1): ((RCOO)8M5(OH)2)n ??(1) wherein in the formula (1), M is a metal atom, R is a hydrogen atom, an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 2 to 18 carbon atoms or an alkynyl group having 2 to 18 carbon atoms, a plurality of R may be identical to or different from each other, at least one of R is the alkenyl group having 2 to 18 carbon atoms or the alkynyl group having 2 to 18 carbon atoms, and n is an integer of 1 or more.Type: GrantFiled: December 21, 2017Date of Patent: February 18, 2020Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Hiroshi Tadaoka, Kazuyoshi Shiga
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Publication number: 20200001137Abstract: An object of the present invention is to provide a golf ball having excellent resilience. 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, and (b) a co-crosslinking agent containing (b1) a carboxylic acid represented by a structural formula (1) and/or a metal salt thereof. [In the formula (1), A1 to A4 each independently represents a nitrogen atom or a carbon atom. X1 represents a single bond or a divalent organic group. R1 represents a hydrogen atom or a monovalent organic group. It is noted that at least one of A1 to A4 is the carbon atom, and X1 and R1 bond to the carbon atom. n represents an integer of 0 to 3. When n is 2 or more, a plurality of R1 may be identical to or different from each other, and a plurality of R1 may bond to each other to form a ring structure.Type: ApplicationFiled: June 26, 2019Publication date: January 2, 2020Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Ryota Sakamine, Hiroshi Tadaoka, Chiemi Mikura, Kazuyoshi Shiga