Patents by Inventor Kazuyuki Nishioka
Kazuyuki Nishioka 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: 10189987Abstract: The present invention provides a pneumatic tire provided with a tread formed from a rubber composition that can achieve balanced improvements in fuel economy and wet-grip performance. The present invention relates to a pneumatic tire provided with a tread formed from a rubber composition, the rubber composition containing a rubber component, silica, and a specific silane coupling agent, the rubber component containing, based on 100% by mass of the rubber component, not less than 5% by mass of a conjugated diene polymer containing a constituent unit based on a conjugated diene and a specific constituent unit, at least one terminal of the polymer being modified with a specific compound, the rubber composition containing the silica in an amount of 5 to 150 parts by mass relative to 100 parts by mass of the rubber component.Type: GrantFiled: October 27, 2014Date of Patent: January 29, 2019Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Kazuyuki Nishioka, Kenichi Uesaka, Takahiro Kawachi, Masako Nakatani, Tatsuhiro Tanaka, Fumiya Kato
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Publication number: 20180200975Abstract: Provided is a stable and highly productive method for producing a pneumatic tire. The present invention relates to a method for producing a pneumatic tire, the method including: sequentially preparing a sealant by mixing raw materials including an organic peroxide using a twin screw kneading extruder; and sequentially applying the sealant to the inner periphery of a tire.Type: ApplicationFiled: October 16, 2015Publication date: July 19, 2018Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Satoshi YAMADA, Yoshinobu MIYANAGA, Naoki YUKAWA, Kazuyuki NISHIOKA
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Patent number: 9932460Abstract: The present invention provides a rubber composition that can enhance the fuel economy, wet-grip performance, and abrasion resistance in a balanced manner, and a pneumatic tire using this rubber composition. The present invention relates to a rubber composition that contains a rubber component, silica, and a liquid resin having a softening point of ?20 to 20° C., wherein the rubber component contains, based on 100% by mass of the rubber component, not less than 5% by mass of a conjugated diene polymer containing a constituent unit based on a conjugated diene and a constituent unit represented by formula (I) below, at least one terminal of the polymer being modified with a specific compound; and an amount of the silica is 5 to 150 parts by mass per 100 parts by mass of the rubber component.Type: GrantFiled: April 20, 2012Date of Patent: April 3, 2018Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Isamu Tsumori, Kenichi Uesaka, Naoya Omura, Tetsuya Kunisawa, Tatsuhiro Tanaka, Kazuyuki Nishioka
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Patent number: 9845385Abstract: The present invention provides a rubber composition that can enhance the fuel economy, wet-grip performance, abrasion resistance, and kneading processability in a balanced manner, and a pneumatic tire using this rubber composition. The present invention relates to a rubber composition that contains a rubber component and silica, wherein the rubber component contains, based on 100% by mass of the rubber component, 10 to 70% by mass of a high-cis polybutadiene having a cis content of 95% by mass or more and satisfying the following requirements (A) to (C): (A) a Mooney viscosity (ML) of 40 to 49; (B) a molecular weight distribution (weight-average molecular weight (Mw)/number-average molecular weight (Mn)) of 3.0 to 3.9; and (C) an index (n-value in Expression (1) below) of velocity dependence of Mooney viscosity of 2.3 to 3.Type: GrantFiled: April 27, 2012Date of Patent: December 19, 2017Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Takahiro Mabuchi, Tatsuhiro Tanaka, Kazuyuki Nishioka, Kenichi Uesaka
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Publication number: 20160264772Abstract: The present invention provides a pneumatic tire provided with a tread formed from a rubber composition that can achieve balanced improvements in fuel economy and wet-grip performance. The present invention relates to a pneumatic tire provided with a tread formed from a rubber composition, the rubber composition containing a rubber component, silica, and a specific silane coupling agent, the rubber component containing, based on 100% by mass of the rubber component, not less than 5% by mass of a conjugated diene polymer containing a constituent unit based on a conjugated diene and a specific constituent unit, at least one terminal of the polymer being modified with a specific compound, the rubber composition containing the silica in an amount of 5 to 150 parts by mass relative to 100 parts by mass of the rubber component.Type: ApplicationFiled: October 27, 2014Publication date: September 15, 2016Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Kazuyuki NISHIOKA, Kenichi UESAKA, Takahiro KAWACHI, Masako NAKATANI, Tatsuhiro TANAKA, Fumiya KATO
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Patent number: 9328225Abstract: The present invention relates to a rubber composition for a tire that includes silica and a rubber component that contains not less than 5% by mass of a conjugated diene polymer, based on 100% by mass of the rubber component, the conjugated diene polymer containing a constituent unit derived from a conjugated diene and a constituent unit represented by the following formula (I): at least one terminal of the conjugated diene polymer being modified by a compound represented by the following formula (II):Type: GrantFiled: July 22, 2011Date of Patent: May 3, 2016Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Kazuyuki Nishioka, Yuko Hinohara, Takahiro Mabuchi
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Patent number: 9267020Abstract: A rubber composition that can improve in good balance the fuel economy, wet-grip performance, and abrasion resistance, and a pneumatic tire that uses this rubber composition are provided. This rubber composition contains a rubber component, and carbon black and/or silica, wherein based on 100% by mass of the rubber component, the rubber component contains 5 to 50% by mass of natural rubber, 0.3 to 10% by mass of an epoxidized natural rubber, and at least 5% by mass of a conjugated diene polymer that has a constituent unit based on a conjugated diene and a constituent unit represented by formula (I) below, at least one terminal of the polymer being modified, and wherein a total content of the carbon black and the silica is 3 to 100 parts by mass per 100 parts by mass of the rubber component.Type: GrantFiled: December 12, 2011Date of Patent: February 23, 2016Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Toshikazu Kondo, Jun Okamoto, Sakae Okubo, Ryoichi Kasahara, Kenji Murata, Kazuhiro Kodama, Kazuyuki Nishioka
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Patent number: 9139719Abstract: The present invention provides a rubber composition that achieves a well-balanced improvement in fuel economy, wet-grip performance, and abrasion resistance, and a pneumatic tire formed from the rubber composition. The present invention relates to a rubber composition, including a rubber component and silica, wherein the rubber component contains not less than 5% by mass of a conjugated diene polymer, based on 100% by mass of the rubber component, the conjugated diene polymer containing a constituent unit derived from a conjugated diene and a constituent unit represented by the following formula (I): at least one terminal of the conjugated diene polymer being modified by a compound containing a group represented by the following formula (II): and wherein the silica is contained in an amount of 5 to 150 parts by mass per 100 parts by mass of the rubber component.Type: GrantFiled: July 22, 2011Date of Patent: September 22, 2015Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Yuko Hinohara, Kazuyuki Nishioka, Takahiro Mabuchi
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Patent number: 9035001Abstract: The present invention provides a diene polymer in which a polar functional group is introduced into an end by radical polymerization, and its production method; a polymer emulsion and a rubber composition each containing the diene polymer; and a pneumatic tire containing the rubber composition. The present invention relates to a diene polymer, which is obtained by radical polymerization of at least one radical polymerizable monomer in the presence of at least one polar functional group-containing thiol compound, and has a polar functional group at at least one end: The polar functional group-containing thiol compound is preferably represented by formula (1): X—R1—SH??(1) wherein X represents an ester group, a hydroxyl group, a carboxyl group, an amino group, or an alkoxysilyl group, and R1 represents an alkylene or arylene group which may have a substituent.Type: GrantFiled: April 12, 2012Date of Patent: May 19, 2015Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Satoru Inoue, Kazuyuki Nishioka
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Publication number: 20140011910Abstract: The present invention provides a rubber composition that can enhance the fuel economy, wet-grip performance, abrasion resistance, and kneading processability in a balanced manner, and a pneumatic tire using this rubber composition. The present invention relates to a rubber composition that contains a rubber component and silica, wherein the rubber component contains, based on 100% by mass of the rubber component, 10 to 70% by mass of a high-cis polybutadiene having a cis content of 95% by mass or more and satisfying the following requirements (A) to (C): (A) a Mooney viscosity (ML) of 40 to 49; (B) a molecular weight distribution (weight-average molecular weight (Mw)/number-average molecular weight (Mn)) of 3.0 to 3.9; and (C) an index (n-value in Expression (1) below) of velocity dependence of Mooney viscosity of 2.3 to 3.Type: ApplicationFiled: April 27, 2012Publication date: January 9, 2014Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Takahiro Mabuchi, Tatsuhiro Tanaka, Kazuyuki Nishioka, Kenichi Uesaka
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Publication number: 20130345337Abstract: The present invention provides a rubber composition that can enhance the fuel economy, wet-grip performance, and abrasion resistance in a balanced manner, and a pneumatic tire using this rubber composition. The present invention relates to a rubber composition that contains a rubber component, silica, and a liquid resin having a softening point of ?20 to 20° C., wherein the rubber component contains, based on 100% by mass of the rubber component, not less than 5% by mass of a conjugated diene polymer containing a constituent unit based on a conjugated diene and a constituent unit represented by formula (I) below, at least one terminal of the polymer being modified with a specific compound; and an amount of the silica is 5 to 150 parts by mass per 100 parts by mass of the rubber component.Type: ApplicationFiled: April 20, 2012Publication date: December 26, 2013Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Isamu Tsumori, Kenichi Uesaka, Naoya Omura, Tetsuya Kunisawa, Tatsuhiro Tanaka, Kazuyuki Nishioka
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Publication number: 20130090422Abstract: The present invention provides a rubber composition that achieves a well-balanced improvement in fuel economy, wet-grip performance, and abrasion resistance, and a pneumatic tire formed from the rubber composition. The present invention relates to a rubber composition, including a rubber component and silica, wherein the rubber component contains not less than 5% by mass of a conjugated diene polymer, based on 100% by mass of the rubber component, the conjugated diene polymer containing a constituent unit derived from a conjugated diene and a constituent unit represented by the following formula (I): at least one terminal of the conjugated diene polymer being modified by a compound containing a group represented by the following formula (II): and wherein the silica is contained in an amount of 5 to 150 parts by mass per 100 parts by mass of the rubber component.Type: ApplicationFiled: July 22, 2011Publication date: April 11, 2013Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Yuko Hinohara, Kazuyuki Nishioka, Takahiro Mabuchi
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Publication number: 20130090409Abstract: The present invention provides a rubber composition that achieves a well-balanced improvement in fuel economy, wet-grip performance, and abrasion resistance, and a pneumatic tire formed from the rubber composition. The present invention relates to a rubber composition, including a rubber component and silica, wherein the rubber component contains not less than 5% by mass of a conjugated diene polymer, based on 100% by mass of the rubber component, the conjugated diene polymer containing a constituent unit derived from a conjugated diene and a constituent unit represented by the following formula (I): at least one terminal of the conjugated diene polymer being modified by a compound containing a group represented by the following formula (II): and wherein the silica is contained in an amount of 5 to 150 parts by mass per 100 parts by mass of the rubber component.Type: ApplicationFiled: July 22, 2011Publication date: April 11, 2013Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Yuko Hinohara, Kazuyuki Nishioka, Takahiro Mabuchi
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Publication number: 20130085225Abstract: The invention provides a rubber composition that achieves a well-balanced improvement in fuel economy, wet-grip performance, and abrasion resistance, and a pneumatic tire formed from the rubber composition. The invention relates to a rubber composition, including a rubber component and silica, wherein the rubber component contains not less than 5% by mass of a conjugated diene polymer, based on 100% by mass of the rubber component, the conjugated diene polymer containing a constituent unit derived from a conjugated diene and a constituent unit represented by the following formula (I): at least one terminal of the conjugated diene polymer being modified by a silicon compound containing a group represented by the following formula (II) and/or a group represented by the following formula (III): and wherein the silica is contained in an amount of 5 to 150 parts by mass per 100 parts by mass of the rubber component.Type: ApplicationFiled: July 22, 2011Publication date: April 4, 2013Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Kazuyuki Nishioka, Yuko Hinohara, Takahiro Mabuchi
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Publication number: 20130085226Abstract: The present invention provides a rubber composition that achieves a well-balanced improvement in fuel economy, wet-grip performance, and abrasion resistance, and a pneumatic tire formed from the rubber composition. The present invention relates to a rubber composition, including a rubber component and silica, wherein the rubber component contains not less than 5% by mass of a conjugated diene polymer, based on 100% by mass of the rubber component, the conjugated diene polymer containing a constituent unit derived from a conjugated diene and a constituent unit represented by the following formula (I): at least one terminal of the conjugated diene polymer being modified by a compound represented by the following formula (II): and wherein the silica is contained in an amount of 5 to 150 parts by mass per 100 parts by mass of the rubber component.Type: ApplicationFiled: July 22, 2011Publication date: April 4, 2013Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Yuko Hinohara, Kazuyuki Nishioka, Takahiro Mabuchi
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Publication number: 20130079464Abstract: The present invention provides a rubber composition that achieves a well-balanced improvement in fuel economy, wet-grip performance, and abrasion resistance, and a pneumatic tire formed from the rubber composition. The present invention relates to a rubber composition, including a rubber component and silica, wherein the rubber component contains not less than 5% by mass of a conjugated diene polymer, based on 100% by mass of the rubber component, the conjugated diene polymer containing a constituent unit derived from a conjugated diene and a constituent unit represented by the following formula (I): at least one terminal of the conjugated diene polymer being modified by a compound represented by the following formula (II): and wherein the silica is contained in an amount of 5 to 150 parts by mass per 100 parts by mass of the rubber component.Type: ApplicationFiled: July 22, 2011Publication date: March 28, 2013Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Kazuyuki Nishioka, Yuko Hinohara, Takahiro Mabuchi
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Publication number: 20120264898Abstract: The present invention provides a diene polymer in which a polar functional group is introduced into an end by radical polymerization, and its production method; a polymer emulsion and a rubber composition each containing the diene polymer; and a pneumatic tire containing the rubber composition. The present invention relates to a diene polymer, which is obtained by radical polymerization of at least one radical polymerizable monomer in the presence of at least one polar functional group-containing thiol compound, and has a polar functional group at at least one end: The polar functional group-containing thiol compound is preferably represented by formula (1): X—R1—SH ??(1) wherein X represents an ester group, a hydroxyl group, a carboxyl group, an amino group, or an alkoxysilyl group, and R1 represents an alkylene or arylene group which may have a substituent.Type: ApplicationFiled: April 12, 2012Publication date: October 18, 2012Inventors: Satoru INOUE, Kazuyuki Nishioka
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Publication number: 20120149806Abstract: A rubber composition that can improve in good balance the fuel economy, wet-grip performance, and abrasion resistance, and a pneumatic tire that uses this rubber composition are provided. This rubber composition contains a rubber component, and carbon black and/or silica, wherein based on 100% by mass of the rubber component, the rubber component contains 5 to 50% by mass of natural rubber, 0.3 to 10% by mass of an epoxidized natural rubber, and at least 5% by mass of a conjugated diene polymer that has a constituent unit based on a conjugated diene and a constituent unit represented by formula (I) below, at least one terminal of the polymer being modified, and wherein a total content of the carbon black and the silica is 3 to 100 parts by mass per 100 parts by mass of the rubber component.Type: ApplicationFiled: December 12, 2011Publication date: June 14, 2012Inventors: Toshikazu KONDO, Jun OKAMOTO, Sakae OKUBO, Ryoichi KASAHARA, Kenji MURATA, Kazuhiro KODAMA, Kazuyuki NISHIOKA
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Patent number: 7999036Abstract: The present invention provides a rubber composition capable of improving grip performance and abrasion resistance and a tire prepared by using the rubber composition. The rubber composition of the present invention comprises 0.5 to 150 parts by weight of thermoplastic polyurethane prepared from a conjugated diene polymer modified with hydroxyl groups at both ends thereof or an aromatic vinyl-conjugated diene copolymer modified with hydroxyl groups at both ends thereof based on 100 parts by weight of a rubber component comprising a diene rubber. The tire of the present invention is prepared by using the rubber composition.Type: GrantFiled: July 16, 2007Date of Patent: August 16, 2011Assignee: Sumitomo Rubber Industries, Ltd.Inventors: Kazuyuki Nishioka, Kazuyoshi Shiga, Katsumi Terakawa
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Patent number: 7956130Abstract: A rubber composition for a tire superior in grip performance and abrasion resistance and a tire prepared by using the same are provided. The rubber composition for a tire comprises 3 to 200 parts by weight of an aromatic vinyl polymer having an end modified with —OH, —SH, —COOH, —CSSH, —SO3H, —(COO)xM, —(SO3)xM or —CO—R (M is a cation, x is an integer of 1 to 3 depending on the valency of M and R is an alkyl group) and having a weight average molecular weight of 300 to 10,000, based on 100 parts by weight of a diene rubber, and the tire is prepared by using the rubber composition.Type: GrantFiled: July 20, 2007Date of Patent: June 7, 2011Assignee: Sumitomo Rubber Industries, Ltd.Inventors: Kazuyuki Nishioka, Katsumi Terakawa