Patents by Inventor Takeshi Niitani
Takeshi Niitani 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: 7919570Abstract: The present invention provides a multibranched polymer represented by the following formula (I), and a method for producing the multibranched polymer: wherein A represents an organic group having 3 or more branched chains, Xa represents a linking group containing any atom of Groups 14 to 16 in the Periodic Table, Y represents a functional group having a structure capable of having an active halogen atom, Q represents an arm moiety having a repeating unit derived from a polymerizable unsaturated bond, m1 represents any integer of 1 to the number of branched chains of A, m2 represents the number of branched chains of A, n1 represents an integer of 0 or 1 or more, and Ra represents an organic group which is not associated with the polymerization reaction.Type: GrantFiled: August 11, 2005Date of Patent: April 5, 2011Assignee: Nippon Soda Co., Ltd.Inventors: Takeshi Niitani, Kiyoshi Kawamura, Akihiro Shirai
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Publication number: 20100210805Abstract: Disclosed is a star polymer having a core part produced by anionic polymerizing one or more polyfunctional (meth)acrylic acid ester derivative represented by formula (IV) (wherein R represents a hydrogen atom, etc., n represents 2 or 3, and A represents an organic group linking at a carbon atom) in an organic solvent, in the presence of 0.1 to 0.99 mol of organic alkali metal compound with respect to 1 mol of the compound of the formula (IV), and in the presence of 0.1 to 20 mol of inorganic salts of alkali metal or alkali earth metal with respect to 1 mol of the organic alkali metal compound, and an arm part formed by anionic polymerizing from the anionic active site of the core part one or more monofunctional (meth)acrylic acid ester derivative represented by formula (I) (wherein R1 represents a hydrogen atom, etc., and R2 represents an organic group).Type: ApplicationFiled: August 29, 2008Publication date: August 19, 2010Applicant: NIPPON SODA CO., LTD.Inventors: Akihiro Shirai, Takeshi Shimotori, Shinji Marumo, Takeshi Niitani
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Patent number: 7732549Abstract: The aim of the present invention is to provide a multi-branched polymer, in which branch terminals can be easily modified and which have a high degree of branching and narrow dispersion. By polymerizing a compound having 2 or more polymerization-initiation sites and polymerizable unsaturated bonds with a living radical polymerization method using a metal catalyst, it is possible to produce a multi-branched polymer with narrow dispersion and a high degree of branching and having repeating units represented by the formula (I): wherein R1 to R3 each independently represents hydrogen or a hydrocarbon group, R1 may be bonded to R3 to form a ring; X represents a connecting group having a valence of 3 or higher; Y may be the same or different and each represents a functional group which may have a halogen atom at a terminal thereof; and a is an integer of 2 or larger.Type: GrantFiled: November 25, 2004Date of Patent: June 8, 2010Assignee: Nippon Soda Co., Ltd.Inventors: Koichiro Aoyagi, Takeshi Niitani
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Publication number: 20100099819Abstract: Disclosed is a narrow-distribution star polymer having a controlled molecular structure. Also disclosed is a method for simply producing such a star polymer. Specifically disclosed is a method for producing a star polymer, which comprises a step (A) wherein an arm (I) is formed by bonding an anion end of a polymer having an anion end to a core, and a step (B) wherein an arm (II) is extended from the core by living radical polymerization. Also specifically disclosed is a star polymer characterized by having a structure represented by the formula (I-1) or (I-2) below. (I-1) (I-2) (In the formula (I-1) or (I-2), B, C1 and C2 independently represent a group composed of a polymer: m1 and m2 independently represent an integer of 1 or 2; and when m1 or m2 is 2, C1's or C2's represent the same as or different groups.Type: ApplicationFiled: July 11, 2007Publication date: April 22, 2010Applicant: NIPPON SODA CO., LTDInventor: Takeshi Niitani
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Patent number: 7678860Abstract: The present invention provides a polymer solid electrolyte excellent in thermal properties, physical properties and ion conductivity and being close to practical level; especially, a totally solid electrolyte and a composition for producing the same.Type: GrantFiled: January 23, 2004Date of Patent: March 16, 2010Assignee: Nippon Soda Co., Ltd.Inventors: Hiroo Muramoto, Takeshi Niitani, Koichiro Aoyagi
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Patent number: 7649079Abstract: A method for easily and efficiently removing ruthenium complexes, which are generally difficult to remove, from a polymer, as well as a method for purifying a polymer that uses such a removal method are provided. A method for removing a metal, wherein a compound is added that is capable of coordination via a substitution of a ligand of a ruthenium complex, thereby precipitating another ruthenium complex, as well as a method for purifying a polymer that uses such a method.Type: GrantFiled: December 28, 2005Date of Patent: January 19, 2010Assignee: Nippon Soda Co., Ltd.Inventors: Takeshi Niitani, Mitsuo Sawamoto, Tsuyoshi Andoh
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Patent number: 7645830Abstract: A polymer including a block chain A which is formed from a random copolymer containing a repeating unit (I) represented by the formula (I) wherein R1 to R3 each independently represents hydrogen or C1-10 hydrocarbon and R1 and R3 may bond to form a ring; R4a and R4b each independently represents hydrogen or methyl; R5 represents hydrogen, hydrocarbon, acyl, or silyl; and m represents any integer of 1 to 100 and when m is 2 or more and each R4a may be the same or different from one another and each R4b may be the same or different from one another; and a repeating unit (II) represented by the formula (II) wherein R6 and R8 each independently represents hydrogen or C1-10 hydrocarbon and R6 and R8 may bond to form a ring; R7 represents hydrogen, C1-10 hydrocarbon, hydroxyl, hydrocarbonoxy, carboxyl, acid anhydride, amino, ester, or an organic group having at least one functional group selected from the group consisting of hydroxyl, carboxyl, epoxy, acid anhydride, and amino; and R9 represents anType: GrantFiled: January 18, 2006Date of Patent: January 12, 2010Assignee: Nippon Soda Co., Ltd.Inventors: Takeshi Niitani, Masato Amaike, Mikiya Shimada, Kiyoshi Kawamura
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Publication number: 20090275772Abstract: An object of the present invention is to provide a method capable of producing a 1,2-phenylethane compound with extremely high yield in a short amount of time.Type: ApplicationFiled: March 16, 2007Publication date: November 5, 2009Inventor: Takeshi Niitani
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Publication number: 20090246630Abstract: A positive electrode for a non-aqueous electrolyte battery includes a positive electrode active material layer containing at least a positive electrode active material and a binder and a coating layer containing a polymer provided on the positive electrode active material layer, wherein the polymer has a block chain A composed of a random copolymer containing a repeating unit (I) represented by formula (I), a repeating unit (II) represented by formula (II), and a block chain B containing a repeating unit (III) represented by formula (III) wherein R1-R3, R4a, R4b, R5-R13 are as defined herein.Type: ApplicationFiled: September 26, 2008Publication date: October 1, 2009Inventors: Nobuhiro Sakitani, Naoki Imachi, Atsushi Kaizuka, Takeshi Niitani, Masato Amaike
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Patent number: 7579401Abstract: An object of the present invention is to provide a practical solid polymer electrolyte that exhibits excellent thermal characteristics, physical characteristics, and ionic conductivity, and in particular, to provide a completely solid electrolyte and a copolymer composition that functions as the substrate for producing such an electrolyte. A solid polymer electrolyte comprising an electrolyte salt, and a copolymer in which a block chain A containing a repeating unit represented by a formula (I) shown below, a block chain B containing a repeating unit represented by a formula (II) shown below: (wherein, R9 represents an aryl group), and a block chain C containing a repeating unit represented by a formula (III) shown below: (wherein, R13 represents an aryl group or a heteroaryl group) are arranged in the sequence B, A, C.Type: GrantFiled: July 23, 2003Date of Patent: August 25, 2009Assignee: Nippon Soda Co., Ltd.Inventors: Hiroo Muramoto, Takeshi Niitani
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Publication number: 20090118436Abstract: The present invention provides a novel narrow distribution dendrimer-like star polymer having a controlled molecular structure, and a method capable of easily producing the star polymer. Disclosed is a polymer comprising a core portion and an arm portion, wherein the arm portion includes a first generation composed of a polymer chain and a second generation composed of a polymer chain formed at the outer shell of the first generation, the number of arms of the second generation is larger than the number of arms of the first generation, the first generation composed of the polymer chain is a polymer chain derived from a monomer having a polymerizable double bond, and the ratio of the weight average molecular weight (Mw) to the number average molecular weight (Mn), (Mw/Mn), of the star polymer is within a range from 1.001 to 2.50.Type: ApplicationFiled: September 7, 2006Publication date: May 7, 2009Applicant: NIPPON SODA CO., LTD.Inventor: Takeshi Niitani
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Publication number: 20080214685Abstract: The present invention provides a multibranched polymer represented by the following formula (I), and a method for producing the multibranched polymer: wherein A represents an organic group having 3 or more branched chains, Xa represents a linking group containing any atom of Groups 14 to 16 in the Periodic Table, Y represents a functional group having a structure capable of having an active halogen atom, Q represents an arm moiety having a repeating unit derived from a polymerizable unsaturated bond, m1 represents any integer of 1 to the number of branched chains of A, m2 represents the number of branched chains of A, n1 represents an integer of 0 or 1 or more, and Ra represents an organic group which is not associated with the polymerization reaction.Type: ApplicationFiled: August 11, 2005Publication date: September 4, 2008Applicant: NIPPON SODA CO., LTD.Inventors: Takeshi Niitani, Kiyoshi Kawamura, Akihiro Shirai
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Publication number: 20080166636Abstract: A polymer including a block chain A which is formed from a random copolymer containing a repeating unit (I) represented by the formula (I) wherein R1 to R3 each independently represents hydrogen or C1-10 hydrocarbon and R1 and R3 may bond to form a ring; R4a and R4b each independently represents hydrogen or methyl; R5 represents hydrogen, hydrocarbon, acyl, or silyl; and m represents any integer of 1 to 100 and when m is 2 or more and each R4a may be the same or different from one another and each R4b may be the same or different from one another; and a repeating unit (II) represented by the formula (II) wherein R6 and R8 each independently represents hydrogen or C1-10 hydrocarbon and R6 and R8 may bond to form a ring; R7 represents hydrogen, C1-10 hydrocarbon, hydroxyl, hydrocarbonoxy, carboxyl, acid anhydride, amino, ester, or an organic group having at least one functional group selected from the group consisting of hydroxyl, carboxyl, epoxy, acid anhydride, and amino; and R9 represents anType: ApplicationFiled: January 18, 2006Publication date: July 10, 2008Inventors: Takeshi Niitani, Masato Amaike, Mikiya Shimada, Kiyoshi Kawamura
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Publication number: 20080119635Abstract: A method for easily and efficiently removing ruthenium complexes, which are generally difficult to remove, from a polymer, as well as a method for purifying a polymer that uses such a removal method are provided. A method for removing a metal, wherein a compound is added that is capable of coordination via a substitution of a ligand of a ruthenium complex, thereby precipitating another ruthenium complex, as well as a method for purifying a polymer that uses such a method.Type: ApplicationFiled: December 28, 2005Publication date: May 22, 2008Applicant: Nippon Soda Co., Ltd.Inventors: Takeshi Niitani, Mitsuo Sawamoto, Tsuyoshi Andoh
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Publication number: 20070142504Abstract: The aim of the present invention is to provide a multi-branched polymer, in which branch terminals can be easily modified and which have a high degree of branching and narrow dispersion. By polymerizing a compound having 2 or more polymerization-initiation sites and polymerizable unsaturated bonds with a living radical polymerization method using a metal catalyst, it is possible to produce a multi-branched polymer with narrow dispersion and a high degree of branching and having repeating units represented by the formula (I): wherein R1 to R3 each independently represents hydrogen or a hydrocarbon group, R1 may be bonded to R3 to form a ring; X represents a connecting group having a valence of 3 or higher; Y may be the same or different and each represents a functional group which may have a halogen atom at a terminal thereof; and a is an integer of 2 or larger.Type: ApplicationFiled: November 25, 2004Publication date: June 21, 2007Applicant: Nippon Soda Co., Ltd.Inventors: Koichiro Aoyagi, Takeshi Niitani
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Publication number: 20050256256Abstract: An object of the present invention is to provide a practical solid polymer electrolyte that exhibits excellent thermal characteristics, physical characteristics, and ionic conductivity, and in particular, to provide a completely solid electrolyte and a copolymer composition that functions as the substrate for producing such an electrolyte. A solid polymer electrolyte comprising an electrolyte salt, and a copolymer in which a block chain A containing a repeating unit represented by a formula (I) shown below, a block chain B containing a repeating unit represented by a formula (II) shown below: (wherein, R9 represents an aryl group), and a block chain C containing a repeating unit represented by a formula (III) shown below: (wherein, R13 represents an aryl group or a heteroaryl group) are arranged in the sequence B, A, C.Type: ApplicationFiled: July 23, 2003Publication date: November 17, 2005Applicant: NIPPON SODA CO., LTDInventors: Hiroo Muramoto, Takeshi Niitani