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).
-
Patent number: 9562128Abstract: A novel copolymer having excellent pigment dispersion performance, and more particularly, a novel copolymer usable as a pigment dispersing agent that can attain high luminance and high contrast of a green picture element in a color filter. The novel copolymer contains: a block chain (A) including a repeating unit having a tertiary amino group; and a block chain (B) including a repeating unit represented by the following formula (I) (wherein R1 represents a hydrogen atom or a C1-C3 alkyl group, R2 and R3 each independently represent a hydrogen atom or a C1-C6 alkyl group, Q represents an oxygen-containing saturated hetero ring group optionally having an alkyl group as a substituent or a C2-C20 alkenyl group, and n represents an integer of 0 to 6), and has an amine value of 80 mgKOH/g or more and 250 mgKOH/g or less.Type: GrantFiled: October 15, 2012Date of Patent: February 7, 2017Assignee: NIPPON SODA CO., LTD.Inventors: Takeshi Niitani, Toshiaki Okado, Izumi Tando, Hidenori Naruse, Tooru Kajita
-
Publication number: 20160297911Abstract: A copolymer which yields a coated film with high transparency when formed into a coated film, and adds a regenerable antibacterial effect, as well as a resin composition containing the same. The copolymer includes: a repeating unit represented by the following formula (I) (wherein R1 represents a hydrogen atom or a methyl group; R2 represents a hydrogen atom or a saturated or unsaturated alkyl group having 1 to 18 carbon atoms; R11 to R14 each independently represent a hydrogen atom or an alkyl group, provided that at least 2 of R11 to R14 represent an alkyl group, and that R11 and R12, or R13 and R14 can bond together to form a ring; X represents —O— or —NR2—; R20 represents a hydrogen atom or an alkyl group; Y represents a halogen atom; and n represents 0 or 1), and a repeating unit having a crosslinkable functional group.Type: ApplicationFiled: December 1, 2014Publication date: October 13, 2016Applicant: NIPPON SODA CO., LTD.Inventors: Takeshi NIITANI, Yuichi TATEISHI, Shigebumi ARAI
-
Patent number: 9217052Abstract: An object of the present invention is to provide a novel copolymer useful as a dispersing agent for a pigment or the like. The novel copolymer contains: a block chain (A) comprising at least one repeating unit selected from the group consisting of a repeating unit having a tertiary amino group and a repeating unit having a quaternary ammonium salt group; and a block chain (B) comprising a repeating unit having an acidic group and a repeating unit represented by the following formula (I) (wherein R1 represents a hydrogen atom or a C1-C3 alkyl group; and R2 represents an aliphatic hydrocarbon group or an alicyclic hydrocarbon group), wherein the repeating unit represented by formula (I) has a copolymerization ratio of 90 mass % or more in the block chain (B).Type: GrantFiled: June 28, 2011Date of Patent: December 22, 2015Assignee: NIPPON SODA CO., LTD.Inventors: Takeshi Niitani, Gou Mishima, Yuichi Tateishi, Toshiaki Okado, Hidenori Naruse, Tooru Kajita
-
Patent number: 9115239Abstract: The present invention provides a novel copolymer useful as a dispersing agent for a pigment or the like. The novel copolymer contains a block chain (A) consisting of a polymer comprising at least one repeating unit selected from the group consisting of a repeating unit having a tertiary amino group and a repeating unit having a quaternary ammonium base; and a block chain (B) consisting of a copolymer comprising a repeating unit having a polyoxyalkylene chain and a repeating unit having an acidic group.Type: GrantFiled: April 8, 2011Date of Patent: August 25, 2015Assignee: NIPPON SODA CO., LTD.Inventors: Takeshi Niitani, Yuichi Tateishi, Toshiaki Okado, Hidenori Naruse, Tooru Kajita
-
Patent number: 9023950Abstract: The present invention provides a styrene-based star polymer with narrow dispersion and suitable as a resist material, etc. A star polymer of the present invention is represented by the formula A[C(Y)Xm]n (wherein A represents a polyvalent aliphatic hydrocarbon group with 4-15 carbons, C represents a carbon atom, X represents a styrene-based polymer chain, Y represents a hydroxy group or an oxo group, m represents an integer of 1 or 2, and n represents any integer from 2 to 5, with the proviso that if Y is a hydroxy group, m is 2, and if Y is an oxo group, m is 1). The star polymer can be produced by reacting a styrene-based polymer having an anionic end, and an aliphatic carboxylic acid ester represented by A(COOR)n (wherein R represents an alkyl group having 1-8 carbons, and A and n are as defined for the above formula).Type: GrantFiled: April 18, 2011Date of Patent: May 5, 2015Assignee: Nippon Soda Co., Ltd.Inventors: Akihiro Shirai, Takeshi Niitani
-
Patent number: 9018311Abstract: An object of the present invention is to provide a novel copolymer useful as a pigment dispersing agent in the field of color liquid crystal displays and the like.Type: GrantFiled: November 2, 2011Date of Patent: April 28, 2015Assignee: Nippon Soda Co., Ltd.Inventors: Takeshi Niitani, Toshiaki Okado, Hidenori Naruse, Tooru Kajita
-
Publication number: 20140256884Abstract: A novel copolymer having excellent pigment dispersion performance, and more particularly, a novel copolymer usable as a pigment dispersing agent that can attain high luminance and high contrast of a green picture element in a color filter. The novel copolymer contains: a block chain (A) including a repeating unit having a tertiary amino group; and a block chain (B) including a repeating unit represented by the following formula (I) (wherein R1 represents a hydrogen atom or a C1-C3 alkyl group, R2 and R3 each independently represent a hydrogen atom or a C1-C6 alkyl group, Q represents an oxygen-containing saturated hetero ring group optionally having an alkyl group as a substituent or a C2-C20 alkenyl group, and n represents an integer of 0 to 6), and has an amine value of 80 mgKOH/g or more and 250 mgKOH/g or less.Type: ApplicationFiled: October 15, 2012Publication date: September 11, 2014Applicant: NIPPON SODA CO., LTD.Inventors: Takeshi Niitani, Toshiaki Okado, Izumi Tando, Hidenori Naruse, Tooru Kajita
-
Patent number: 8710165Abstract: A multibranched polymer represented by the following formula (I), and a method for producing the multibranched polymer: where 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 that is not associated with the polymerization reaction.Type: GrantFiled: February 7, 2011Date of Patent: April 29, 2014Assignee: Nippon Soda Co., Ltd.Inventors: Takeshi Niitani, Kiyoshi Kawamura, Akihiro Shirai
-
Publication number: 20130217832Abstract: An object of the present invention is to provide a novel copolymer useful as a pigment dispersing agent in the field of color liquid crystal displays and the like.Type: ApplicationFiled: November 2, 2011Publication date: August 22, 2013Applicant: NIPPON SODA CO., LTD.Inventors: Takeshi Niitani, Toshiaki Okado, Hidenori Naruse, Tooru Kajita
-
Patent number: 8436103Abstract: 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: GrantFiled: September 7, 2006Date of Patent: May 7, 2013Assignee: Nippon Soda Co., Ltd.Inventor: Takeshi Niitani
-
Publication number: 20130085233Abstract: An object of the present invention is to provide a novel copolymer useful as a dispersing agent for a pigment or the like. The novel copolymer contains: a block chain (A) comprising at least one repeating unit selected from the group consisting of a repeating unit having a tertiary amino group and a repeating unit having a quaternary ammonium salt group; and a block chain (B) comprising a repeating unit having an acidic group and a repeating unit represented by the following formula (I) (wherein R1 represents a hydrogen atom or a C1-C3 alkyl group; and R2 represents an aliphatic hydrocarbon group or an alicyclic hydrocarbon group), wherein the repeating unit represented by formula (I) has a copolymerization ratio of 90 mass % or more in the block chain (B).Type: ApplicationFiled: June 28, 2011Publication date: April 4, 2013Applicant: NIPPON SODA CO., LTD.Inventors: Takeshi Niitani, Gou Mishima, Yuichi Tateishi, Toshiaki Okado, Hidenori Naruse, Tooru Kajita
-
Publication number: 20130030127Abstract: The present invention provides a styrene-based star polymer with narrow dispersion and suitable as a resist material, etc. A star polymer of the present invention is represented by the formula A[C(Y)Xm]n (wherein A represents a polyvalent aliphatic hydrocarbon group with 4-15 carbons, C represents a carbon atom, X represents a styrene-based polymer chain, Y represents a hydroxy group or an oxo group, m represents an integer of 1 or 2, and n represents any integer from 2 to 5, with the proviso that if Y is a hydroxy group, m is 2, and if Y is an oxo group, m is 1). The star polymer can be produced by reacting a styrene-based polymer having an anionic end, and an aliphatic carboxylic acid ester represented by A(COOR)n (wherein R represents an alkyl group having 1-8 carbons, and A and n are as defined for the above formula).Type: ApplicationFiled: April 18, 2011Publication date: January 31, 2013Applicant: NIPPON SODA CO., LTD.Inventors: Akihiro Shirai, Takeshi Niitani
-
Publication number: 20130023628Abstract: The present invention provides a novel copolymer useful as a dispersing agent for a pigment or the like. The novel copolymer contains a block chain (A) consisting of a polymer comprising at least one repeating unit selected from the group consisting of a repeating unit having a tertiary amino group and a repeating unit having a quaternary ammonium base; and a block chain (B) consisting of a copolymer comprising a repeating unit having a polyoxyalkylene chain and a repeating unit having an acidic group.Type: ApplicationFiled: April 8, 2011Publication date: January 24, 2013Applicant: NIPPON SODA CO., LTD.Inventors: Takeshi Niitani, Yuichi Tateishi, Toshiaki Okado, Hidenori Naruse, Tooru Kajita
-
Patent number: 8247498Abstract: It is to provide a narrowly dispersible star polymer having a controlled molecular structure and a method for easily producing such star polymer. The method comprises step (A) wherein arm (I) is formed by binding the anionic end of a polymer having an anionic end to a core and step (B) wherein arm (II) is extended from the core by a living radical polymerization. Examples of the star polymer is specifically exemplified by star polymers characterized by having a structure represented by formula (I-1) or (I-2) (In formula (I-1) or (I-2), B, C1 and C2 each independently represents a group composed of a polymer; and m1 and m2 each independently represents an integer of 1 or 2, wherein when m1 or m2 is 2, both C1 or both C2 represent the same group or different groups).Type: GrantFiled: July 11, 2007Date of Patent: August 21, 2012Assignee: Nippon Soda Co., Ltd.Inventor: Takeshi Niitani
-
Publication number: 20120077085Abstract: A positive electrode for 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) and 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: November 30, 2011Publication date: March 29, 2012Inventors: Nobuhiro SAKITANI, Naoki Imachi, Atsushi Kaizuka, Takeshi Niitani, Masato Amaike
-
Patent number: 8142929Abstract: A positive electrode for 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) and 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: GrantFiled: May 16, 2011Date of Patent: March 27, 2012Assignees: Sanyo Electric Co., Ltd., Nippon Soda Co., Ltd.Inventors: Nobuhiro Sakitani, Naoki Imachi, Atsushi Kaizuka, Takeshi Niitani, Masato Amaike
-
Patent number: 8034971Abstract: 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: GrantFiled: March 16, 2007Date of Patent: October 11, 2011Assignee: Nippon Soda Co., Ltd.Inventor: Takeshi Niitani
-
Publication number: 20110223479Abstract: A positive electrode for 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) and 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: May 16, 2011Publication date: September 15, 2011Inventors: Nobuhiro Sakitani, Naoki Imachi, Atsushi Kaizuka, Takeshi Niitani, Masato Amaike
-
Patent number: 7968229Abstract: 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: GrantFiled: September 26, 2008Date of Patent: June 28, 2011Assignees: Sanyo Electric Co., Ltd., Nippon Soda Co., Ltd.Inventors: Nobuhiro Sakitani, Naoki Imachi, Atsushi Kaizuka, Takeshi Niitani, Masato Amaike
-
Publication number: 20110152388Abstract: A multibranched polymer represented by the following formula (I), and a method for producing the multibranched polymer: where 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 that is not associated with the polymerization reaction.Type: ApplicationFiled: February 7, 2011Publication date: June 23, 2011Applicant: NIPPON SODA CO., LTD.Inventors: Takeshi Niitani, Kiyoshi Kawamura, Akihiro Shirai