Patents by Inventor Takumi Adachi
Takumi Adachi 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: 20220251351Abstract: A cross-linked product obtained through crosslinking a polymer composition that contains a rubber component, an inorganic filler and a cross-linking agent and that satisfies conditions (a) to (c): (a) the rubber component contains a conjugated diene-based polymer (A) having, when composition ratios (molar ratios) in the conjugated diene-based polymer (A) of structural units represented by formulae (1) to (4) are p, q, r, and s, respectively, a value ? represented by formula (i) of 0.80 or more and 0.97 or less; (b) a blending ratio of the conjugated diene-based polymer (A) is 10% by mass or more relative to a total amount of the rubber component; and (c) a blending ratio of the inorganic filler is 40 to 150 parts by mass relative to 100 parts by mass of the rubber component, wherein the Tg of the cross-linked product is ?25° C. or lower.Type: ApplicationFiled: March 30, 2020Publication date: August 11, 2022Applicant: JSR CORPORATIONInventors: Takumi ADACHI, Yuto SAKAGAMI, Hirofumi SENGA, Takuya SANO, Takato FUKUMOTO, Michitaka KAIZU, Toshimitsu KIKUCHI, Toshiyuki HAYAKAWA
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Publication number: 20220153971Abstract: A hydrogenated conjugated diene-based polymer which has a structure formed by bonding a nitrogen-containing compound having two or more alkoxysilyl groups and two or more nitrogen atoms with a plurality of conjugated diene-based polymer chains, wherein: when a composition ratio (molar ratio) in the hydrogenated conjugated diene-based polymer of each of a structural unit represented by formula (1), a structural unit represented by formula (2), a structural unit represented by formula (3), and a structural unit represented by formula (4) is p, q, r, and s, respectively, a value a represented by formula (i) is 0.80 or more and 0.97 or less, and an equilibrium storage modulus E? of the hydrogenated conjugated diene-based polymer is 2.4 MPa or more, ?=(p+(0.5×xr))/(p+q+(0.5×xr)+s) . . .Type: ApplicationFiled: March 27, 2020Publication date: May 19, 2022Applicant: JSR CORPORATIONInventors: Takumi ADACHI, Hirofumi SENGA, Michitaka KAIZU, Toshimitsu KIKUCHI, Takuya SANO
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Patent number: 11241913Abstract: A rubber composition contains: (A) a polymer having a carbon-carbon unsaturated bond and exhibiting a value ? of 0.6 or more as obtained by the following formula (i): ?=(p+(0.5×r))/(p+q+(0.5×r)+s)??(i) wherein p, q, r, and s are the proportions by mole of structural units represented by the following formulae (1), (2), (3), and (4), respectively in the polymer: and (B) modified silica.Type: GrantFiled: August 16, 2019Date of Patent: February 8, 2022Assignee: JSR CorporationInventors: Koichiro Tani, Takuya Sano, Takato Fukumoto, Naoki Sugiyama, Kunpei Kobayashi, Takumi Adachi, Jiro Ueda, Ryoji Tanaka
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Patent number: 10961327Abstract: Provided is a rubber material that is well-balanced in terms of tensile strength, low hysteresis loss property, wet grip property, and abrasion resistance. A hydrogenated conjugated diene-based polymer which is a hydrogenation product of a conjugated diene-based polymer including butadiene-derived structural units is produced by a method comprising a step of preparing a conjugated diene-based polymer having, at a side chain moiety thereof, a functional group capable of interacting with silica; and a step of hydrogenating the conjugated diene-based polymer so as to achieve a hydrogenation rate of 80 to 99% of butadiene-derived structural units included in the conjugated diene-based polymer.Type: GrantFiled: September 6, 2016Date of Patent: March 30, 2021Assignee: JSR CORPORATIONInventors: Takumi Adachi, Hirofumi Senga, Fumihiro Toyokawa, Naoya Nosaka, Takaomi Matsumoto, Ryoji Tanaka
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Publication number: 20200247982Abstract: The present invention has as its object the provision of a polymer composition from which a rubber elastic body having high strength is obtained and in which excellent processability is achieved, and a tire having excellent strength.Type: ApplicationFiled: April 10, 2020Publication date: August 6, 2020Applicant: JSR CorporationInventors: Takuya SANO, Takato FUKUMOTO, Takumi ADACHI, Naoya HONDA, Kunpei KOBAYSHI, Jiro UEDA
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Publication number: 20200086687Abstract: A rubber composition contains: (A) a polymer having a carbon-carbon unsaturated bond and exhibiting a value ? of 0.6 or more as obtained by the following formula (i): ?=(p+(0.5×r))/(p+q+(0.5×r)+s)??(i) wherein p, q, r, and s are the proportions by mole of structural units represented by the following formulae (1), (2), (3), and (4), respectively in the polymer: and (B) modified silica.Type: ApplicationFiled: August 16, 2019Publication date: March 19, 2020Applicant: JSR CorporationInventors: Koichiro TANI, Takuya SANO, Takato FUKUMOTO, Naoki SUGIYAMA, Kunpei KOBAYASHI, Takumi ADACHI, Jiro UEDA, Ryoji TANAKA
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Publication number: 20190218378Abstract: Provided is a method that can produce an inexpensive rubber composition capable of providing a rubber elastic body having high strength. A method for producing a rubber composition of the present invention includes steps of: (A) kneading a component containing at least a highly saturated conjugated diene-based polymer and a crosslinking agent component; (B) kneading a component containing at least a conjugated diene-based polymer other than the highly saturated conjugated diene-based polymer; and (C) kneading an intermediate composition (a) obtained in the step (A) and an intermediate composition (b) obtained in the step (B).Type: ApplicationFiled: March 26, 2019Publication date: July 18, 2019Applicant: JSR CorporationInventors: Takumi ADACHI, Takuya SANO, Takato FUKUMOTO, Naoya HONDA, Kunpei KOBAYASHI, Jiro UEDA
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Patent number: 10280232Abstract: A modified conjugated diene-based polymer is produced by reacting a conjugated diene-based polymer having an alkali metal or an alkali-earth metal at a terminal of the polymer with a compound represented by formula (1). R1 and R2 independently represent a hydrocarbyl group having 20 or fewer carbon atoms. R3 represents a substituted alkyl group having 20 or fewer carbon atoms prepared through substitution of at least one of a hydrogen atom and —CH2— of an alkyl group by a group containing only at least one heteroatom selected from the group consisting of nitrogen, phosphorus, oxygen, and sulfur, or a monovalent aromatic group having 20 or fewer carbon atoms and containing at least one element selected from the group consisting of nitrogen, phosphorus, oxygen, and sulfur, with the proviso that R3 does not have active hydrogen. R4 represents an alkanediyl group having 20 or fewer carbon atoms. n is 1 or 2.Type: GrantFiled: January 29, 2016Date of Patent: May 7, 2019Assignee: JSR CORPORATIONInventors: Takumi Adachi, Koichiro Tani, Hiroyuki Morita, Ryoji Tanaka
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Patent number: 10227422Abstract: A modified conjugated diene-based polymer is produced by reacting a conjugated diene-based polymer having an alkali metal or an alkali-earth metal at a terminal of the polymer with a compound represented by formula (1). R1 and R2 independently represent a hydrocarbyl group having 20 or fewer carbon atoms. R3 represents a substituted alkyl group having 20 or fewer carbon atoms prepared through substitution of at least one of a hydrogen atom and —CH2— of an alkyl group by a group containing only at least one heteroatom selected from the group consisting of nitrogen, phosphorus, oxygen, and sulfur, or a monovalent aromatic group having 20 or fewer carbon atoms and containing at least one element selected from the group consisting of nitrogen, phosphorus, oxygen, and sulfur, with the proviso that R3 does not have active hydrogen. R4 represents an alkanediyl group having 20 or fewer carbon atoms. n is 1 or 2.Type: GrantFiled: January 29, 2016Date of Patent: March 12, 2019Assignee: JSR CORPORATIONInventors: Takumi Adachi, Koichiro Tani, Hiroyuki Morita, Ryoji Tanaka
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Publication number: 20190062539Abstract: There is provided a hydrogenated conjugated diene-based rubber which can give a crosslinked rubber having high strength and excellent low fuel consumption performance and can give a rubber composition having excellent formability. A hydrogenated conjugated diene-based rubber having a hydrogenation rate of butadiene unit of 90% or more, wherein, in the molecular weight distribution of the hydrogenated conjugated diene-based rubber as determined by a gel permeation chromatographic method, when a peak area of a molecular weight of 1,000 to 250,000 is taken as AL and a peak area of a molecular weight of 250,000 or more is taken as AH, the ratio of AL to the total area of AL and AH is 0.5% to 20%.Type: ApplicationFiled: March 1, 2017Publication date: February 28, 2019Applicant: JSR CORPORATIONInventors: Takumi ADACHI, Hirofumi SENGA, Fumihiro TOYOKAWA
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Patent number: 10125211Abstract: Provided is a tire member which is satisfactory in low fuel consumption performance and exhibits higher strength and more excellent abrasion resistance as compared with conventional ones. The tire member is a tire member obtained by subjecting a composition containing a hydrogenated conjugated diene polymer and a crosslinking agent to a crosslinking treatment, wherein the hydrogenated conjugated diene polymer is a hydrogenated product of a conjugated diene polymer that has a structural unit derived from butadiene and has a functional group at one end or both ends and the functional group is one or more groups selected from the group consisting of an amino group, an imino group, a pyridyl group, a phosphino group, a thiol group, and a hydrocarbyloxysilyl group.Type: GrantFiled: February 27, 2014Date of Patent: November 13, 2018Assignee: JSR CORPORATIONInventors: Naoya Nosaka, Shigeru Abe, Hirofumi Senga, Takumi Adachi, Ryoji Tanaka
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Publication number: 20180251576Abstract: Provided is a rubber material that is well-balanced in terms of tensile strength, low hysteresis loss property, wet grip property, and abrasion resistance. A hydrogenated conjugated diene-based polymer which is a hydrogenation product of a conjugated diene-based polymer including butadiene-derived structural units is produced by a method comprising a step of preparing a conjugated diene-based polymer having, at a side chain moiety thereof, a functional group capable of interacting with silica; and a step of hydrogenating the conjugated diene-based polymer so as to achieve a hydrogenation rate of 80 to 99% of butadiene-derived structural units included in the conjugated diene-based polymer.Type: ApplicationFiled: September 6, 2016Publication date: September 6, 2018Applicant: JSR CORPORATIONInventors: Takumi ADACHI, Hirofumi SENGA, Fumihiro TOYOKAWA, Naoya NOSAKA, Takaomi MATSUMOTO, Ryoji TANAKA
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Publication number: 20180223008Abstract: A conjugated diene-based polymer comprising a structural unit derived from a conjugated diene compound and having, at a terminal of the polymer, at least one nitrogen-containing group represented by formula (1) is used. In formula (1), R1 is a hydrocarbyl group, and the symbol “*” is a bonding site.Type: ApplicationFiled: July 27, 2016Publication date: August 9, 2018Applicant: JSR CORPORATIONInventors: Mitsunori INOUE, Takumi ADACHI, Kenji YANAGIBASHI, Ryoji TANAKA
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Publication number: 20180207983Abstract: Provided is a hydrogenated conjugated diene polymer which is a hydrogenated product of a conjugated diene polymer comprising a structural unit derived from a conjugated diene compound and a structural unit derived from an aromatic vinyl compound, wherein the conjugated diene compound includes butadiene, the hydrogenated conjugated diene polymer is obtained by hydrogenating a polymer in which a vinyl bond content in the structural unit derived from butadiene is 50 mol % or less, an amount of the structural unit derived from the aromatic vinyl compound is 5 to 25 mass % with respect to entire structural units derived from monomers of the polymer, and a hydrogenation rate of the structural unit derived from butadiene is 91% to 99%.Type: ApplicationFiled: July 21, 2016Publication date: July 26, 2018Applicant: JSR CORPORATIONInventors: Takumi ADACHI, Ryoji TANAKA, Takaomi MATSUMOTO, Fumihiro TOYOKAWA, Naoya NOSAKA
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Publication number: 20180201066Abstract: Provided is a hydrogenated conjugated diene polymer which is a hydrogenated product of a conjugated diene polymer having a structural unit derived from a conjugated diene compound and a structural unit derived from an aromatic vinyl compound, wherein the conjugated diene compound includes butadiene, an amount of the structural unit derived from the aromatic vinyl compound is 30 mass % or more with respect to entire structural units derived from monomers of the polymer, and a hydrogenation rate of the structural unit derived from butadiene is 80% to 99%.Type: ApplicationFiled: July 21, 2016Publication date: July 19, 2018Applicant: JSR CORPORATIONInventors: Takumi ADACHI, Ryoji TANAKA, Takaomi MATSUMOTO, Fumihiro TOYOKAWA, Naoya NOSAKA
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Publication number: 20180201065Abstract: Provided is a hydrogenated conjugated diene polymer which is a hydrogenated product of a conjugated diene polymer comprising a structural unit derived from a conjugated diene compound and a structural unit derived from an aromatic vinyl compound, wherein the conjugated diene compound includes butadiene, the hydrogenated conjugated diene polymer is obtained by hydrogenating a polymer in which a vinyl bond content in structural unit derived from butadiene is 55 mol % or more, and a hydrogenation rate of the structural unit derived from butadiene is 91% to 99%.Type: ApplicationFiled: July 21, 2016Publication date: July 19, 2018Applicant: JSR CORPORATIONInventors: Takumi ADACHI, Ryoji TANAKA, Takaomi MATSUMOTO, Fumihiro TOYOKAWA, Naoya NOSAKA
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Publication number: 20180051101Abstract: A modified conjugated diene-based polymer is produced by reacting a conjugated diene-based polymer having an alkali metal or an alkali-earth metal at a terminal of the polymer with a compound represented by formula (1). R1 and R2 independently represent a hydrocarbyl group having 20 or fewer carbon atoms. R3 represents a substituted alkyl group having 20 or fewer carbon atoms prepared through substitution of at least one of a hydrogen atom and —CH2— of an alkyl group by a group containing only at least one heteroatom selected from the group consisting of nitrogen, phosphorus, oxygen, and sulfur, or a monovalent aromatic group having 20 or fewer carbon atoms and containing at least one element selected from the group consisting of nitrogen, phosphorus, oxygen, and sulfur, with the proviso that R3 does not have active hydrogen. R4 represents an alkanediyl group having 20 or fewer carbon atoms.Type: ApplicationFiled: January 29, 2016Publication date: February 22, 2018Applicant: JSR CORPORATIONInventors: Takumi ADACHI, Koichiro TANI, Hiroyuki MORITA, Ryoji TANAKA
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Publication number: 20150361210Abstract: Provided is a tire member which is satisfactory in low fuel consumption performance and exhibits higher strength and more excellent abrasion resistance as compared with conventional ones. The tire member is a tire member obtained by subjecting a composition containing a hydrogenated conjugated diene polymer and a crosslinking agent to a crosslinking treatment, wherein the hydrogenated conjugated diene polymer is a hydrogenated product of a conjugated diene polymer that has a structural unit derived from butadiene and has a functional group at one end or both ends and the functional group is one or more groups selected from the group consisting of an amino group, an imino group, a pyridyl group, a phosphino group, a thiol group, and a hydrocarbyloxysilyl group.Type: ApplicationFiled: February 27, 2014Publication date: December 17, 2015Applicant: JSR CORPORATIONInventors: Naoya NOSAKA, Shigeru ABE, Hirofumi SENGA, Takumi ADACHI, Ryoji TANAKA
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Patent number: 7350300Abstract: In a shaver having provided on an upper end portion of a main body thereof a head portion comprising a razor having an outer blade and an inner blade, a front cross section of the shaver has a shape narrowed at a substantially center portion in its up and down direction, and a side cross section of the shaver has a substantially S-shape, in order to increase the contact area between the main body and the palm, to improve fit feeling, to make it hard to slip, and to finely adjust the angle of the razor against the skin without moving the wrist.Type: GrantFiled: March 28, 2003Date of Patent: April 1, 2008Assignee: Matsushita Electric Works, Ltd.Inventors: Takashi Yamaguchi, Yasunori Ueda, Kotaro Yanagi, Izumi Mihara, Masahiro Takatani, Tetsushi Ogawa, Takumi Adachi, Etsushi Muramatsu, Tsuyoshi Nishizawa, Takashi Yukawa, Matsuki Yamamoto, Fumio Taniguchi, Masanobu Yamasaki
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Publication number: 20050229400Abstract: In a shaver having provided on an upper end portion of a main body thereof a head portion comprising a razor having an outer blade and an inner blade, a front cross section of the shaver has a shape narrowed at a substantially center portion in its up and down direction, and a side cross section of the shaver has a substantially S-shape, in order to increase the contact area between the main body and the palm, to improve fit feeling, to make it hard to slip, and to finely adjust the angle of the razor against the skin without moving the wrist.Type: ApplicationFiled: March 28, 2003Publication date: October 20, 2005Inventors: Takashi Yamaguchi, Yasunori Ueda, Kotaro Yanagi, Izumi Mihara, Masahiro Takatani, Tetsushi Ogawa, Takumi Adachi, Etsushi Muramatsu, Tsuyoshi Nishizawa, Takashi Yukawa, Matsuki Yamamoto, Fumio Taniguchi, Masanobu Yamasaki