Patents by Inventor Takenori MITAMURA
Takenori MITAMURA 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: 11951193Abstract: A monomer composition for a dental material including a compound represented by Formula (1). In Formula (1), X represents an n-valent organic group having from 1 to 200 carbon atoms and containing at least one selected from the group consisting of an oxygen atom and a nitrogen atom, in which the at least one selected from the group consisting of an oxygen atom and a nitrogen atom is bound to Y; and each Y represents a (meth)acryloyl group-containing group (Y1) represented by the following Formula (A), a (meth)acryloyl group (Y2), a hydrogen atom, or a hydrocarbon group having from 1 to 20 carbon atoms, with the proviso that at least one or more Y, among all Ys included in the compound represented by Formula (1), is the (meth)acryloyl group-containing group (Y1).Type: GrantFiled: December 24, 2019Date of Patent: April 9, 2024Assignee: MITSUI CHEMICALS, INC.Inventors: Takenori Mitamura, Yoko Kosugi
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Publication number: 20230323084Abstract: Provided is a polymerization initiator, which has an excellent curing rate and is an alternative to a polymerization initiator system using a benzoyl peroxide-aromatic amine compound, a curable composition containing the polymerization initiator, a dental material and dental filler material containing the composition, and a kit for preparing the curable composition. The polymerization initiator contains one or more compounds (A) selected from the group consisting of a pyrazolidinedione compound and/or pyrazolidine(di)thione compound (A1), a salt (A2) of the compound (A1), and a malonate compound (A3).Type: ApplicationFiled: June 16, 2023Publication date: October 12, 2023Applicant: MITSUI CHEMICALS, INC.Inventors: Takenori MITAMURA, Yoko KOSUGI
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Patent number: 11744782Abstract: Provided is a curable composition that has a sufficient pot life and does not cause a significant delay in curing time even after long-term storage at room temperature or higher. A separately packed curable composition includes: (A) a first pack containing: (a1) a polymerizable monomer having no acidic group, (b) a polymerizable monomer having an acidic group, and (c) a transition metal compound; and (B) a second pack containing: (a2) a polymerizable monomer having no acidic group, (d) an aromatic amine compound, and (e) at least one compound selected from sulfinic acid and a salt thereof.Type: GrantFiled: August 7, 2018Date of Patent: September 5, 2023Assignee: MITSUI CHEMICALS, INC.Inventors: Takenori Mitamura, Yoko Kosugi
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Patent number: 11306160Abstract: An object of the present invention is to provide a curable composition having sufficient polymerization properties even under acidic conditions. The curable composition of the present invention includes (a) a polymerizable monomer having an acidic group, (b) a transition metal compound, (c) at least one compound selected from benzoxazole compounds and benzothiazole compounds, and (d) a reducing agent.Type: GrantFiled: October 25, 2018Date of Patent: April 19, 2022Assignee: MITSUI CHEMICALS, INC.Inventors: Takenori Mitamura, Yoko Kosugi
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Publication number: 20210338537Abstract: A monomer composition for a dental material including a compound represented by Formula (1). In Formula (1), X represents an n-valent organic group having from 1 to 200 carbon atoms and containing at least one selected from the group consisting of an oxygen atom and a nitrogen atom, in which the at least one selected from the group consisting of an oxygen atom and a nitrogen atom is bound to Y; and each Y represents a (meth)acryloyl group-containing group (Y1) represented by the following Formula (A), a (meth)acryloyl group (Y2), a hydrogen atom, or a hydrocarbon group having from 1 to 20 carbon atoms, with the proviso that at least one or more Y, among all Ys included in the compound represented by Formula (1), is the (meth)acryloyl group-containing group (Y1).Type: ApplicationFiled: December 24, 2019Publication date: November 4, 2021Applicant: MITSUI CHEMICALS, INC.Inventors: Takenori MITAMURA, Yoko KOSUGI
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Patent number: 11110038Abstract: A dental adhesive curable composition containing a polymerizable monomer including a polymerizable monomer represented by formula (1?) and defined amounts of an acidic group-containing polymerizable monomer, a polymerization initiator containing a peroxide and a photopolymerization initiator, and a reductant containing a sulfinic acid compound and/or a salt thereof, and a filler: wherein the R groups, n and m are defined. A dental adhesive curable kit and a mobile tooth fixing material are also provided.Type: GrantFiled: September 30, 2019Date of Patent: September 7, 2021Assignees: MITSUI CHEMICALS, INC., SUN MEDICAL CO., LTD.Inventors: Kazuhiko Yoshinaga, Yoshimitsu Tanabe, Shinsuke Kinoshita, Takenori Mitamura, Hiroki Murai, Takeshi Yokoyama, Yoshihisa Kamimoto, Tatsuya Ori, Hirohisa Shimizu, Masami Arata, Masuji Tsuchikawa, Sayaka Miyamori, Yoshiaki Katsura
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Publication number: 20210169749Abstract: Provided is a curable composition that has a sufficient pot life and does not cause a significant delay in curing time even after long-term storage at room temperature or higher. A separately packed curable composition includes: (A) a first pack containing: (a1) a polymerizable monomer having no acidic group, (b) a polymerizable monomer having an acidic group, and (c) a transition metal compound; and (B) a second pack containing: (a2) a polymerizable monomer having no acidic group, (d) an aromatic amine compound, and (e) at least one compound selected from sulfinic acid and a salt thereof.Type: ApplicationFiled: August 7, 2018Publication date: June 10, 2021Applicant: MITSUI CHEMICALS, INC.Inventors: Takenori MITAMURA, Yoko KOSUGI
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Publication number: 20210130580Abstract: Provided is a polymerization initiator, which has an excellent curing rate and is an alternative to a polymerization initiator system using a benzoyl peroxide-aromatic amine compound, a curable composition containing the polymerization initiator, a dental material and dental filler material containing the composition, and a kit for preparing the curable composition. The polymerization initiator contains one or more compounds (A) selected from the group consisting of a pyrazolidinedione compound and/or pyrazolidine(di)thione compound (A1), a salt (A2) of the compound (A1), and a malonate compound (A3).Type: ApplicationFiled: August 2, 2019Publication date: May 6, 2021Applicant: MITSUI CHEMICALS, INC.Inventors: Takenori MITAMURA, Yoko KOSUGI
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Publication number: 20200291157Abstract: An object of the present invention is to provide a curable composition having sufficient polymerization properties even under acidic conditions. The curable composition of the present invention includes (a) a polymerizable monomer having an acidic group, (b) a transition metal compound, (c) at least one compound selected from benzoxazole compounds and benzothiazole compounds, and (d) a reducing agent.Type: ApplicationFiled: October 25, 2018Publication date: September 17, 2020Applicant: MITSUI CHEMICALS, INC.Inventors: Takenori MITAMURA, Yoko KOSUGI
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Publication number: 20200030194Abstract: A dental adhesive curable composition containing a polymerizable monomer including a polymerizable monomer represented by formula (1?) and defined amounts of an acidic group-containing polymerizable monomer, a polymerization initiator containing a peroxide and a photopolymerization initiator, and a reductant containing a sulfinic acid compound and/or a salt thereof, and a filler: wherein the R groups, n and m are defined. A dental adhesive curable kit and a mobile tooth fixing material are also provided.Type: ApplicationFiled: September 30, 2019Publication date: January 30, 2020Applicants: Mitsui Chemicals, Inc., Sun Medical Co., Ltd.Inventors: Kazuhiko YOSHINAGA, Yoshimitsu TANABE, Shinsuke KINOSHITA, Takenori MITAMURA, Hiroki MURAI, Takeshi YOKOYAMA, Yoshihisa KAMIMOTO, Tatsuya ORI, Hirohisa SHIMIZU, Masami ARATA, Masuji TSUCHIKAWA, Sayaka MIYAMORI, Yoshiaki KATSURA
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Patent number: 10470980Abstract: The present invention provides polymerizable monomers represented by the following general formula (1) that are useful as dental materials. In the general formula (1), Ra is a divalent C6-9 aromatic hydrocarbon group or a divalent C6-9 optionally bridged cyclic hydrocarbon group, R1 and R2 are each a hydrogen atom or a C1-3 alkyl group, R3, R4, R5 and R6 are each a hydrogen atom or a hydrocarbon group, R7 and R8 are each a hydrogen atom or a methyl group, m and n are each independently 0 to 4, and Rb and Rc are each independently a C2-6 linear alkylene or C2-6 linear oxyalkylene group optionally substituted with a C1-3 alkyl group or a (meth)acryloyloxymethylene group in place of a hydrogen atom.Type: GrantFiled: March 31, 2016Date of Patent: November 12, 2019Assignees: MITSUI CHEMICALS, INC., SUN MEDICAL CO., LTD.Inventors: Kazuhiko Yoshinaga, Yoshimitsu Tanabe, Shinsuke Kinoshita, Takenori Mitamura, Hiroki Murai, Takeshi Yokoyama, Yoshihisa Kamimoto, Tatsuya Ori, Hirohisa Shimizu, Masami Arata, Masuji Tsuchikawa, Sayaka Miyamori, Yoshiaki Katsura
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Publication number: 20180110683Abstract: The present invention provides polymerizable monomers represented by the following general formula (1) that are useful as dental materials. In the general formula (1), Ra is a divalent C6-9 aromatic hydrocarbon group or a divalent C6-9 optionally bridged cyclic hydrocarbon group, R1 and R2 are each a hydrogen atom or a C1-3 alkyl group, R3, R4, R5 and R6 are each a hydrogen atom or a hydrocarbon group, R7 and R8 are each a hydrogen atom or a methyl group, m and n are each independently 0 to 4, and Rb and Rc are each independently a C2-6 linear alkylene or C2-6 linear oxyalkylene group optionally substituted with a C1-3 alkyl group or a (meth)acryloyloxymethylene group in place of a hydrogen atom.Type: ApplicationFiled: March 31, 2016Publication date: April 26, 2018Applicants: MITSUI CHEMICALS, INC., SUN MEDICAL CO., LTD.Inventors: Kazuhiko YOSHINAGA, Yoshimitsu TANABE, Shinsuke KINOSHITA, Takenori MITAMURA, Hiroki MURAI, Takeshi YOKOYAMA, Yoshihisa KAMIMOTO, Tatsuya ORI, Hirohisa SHIMIZU, Masami ARATA, Masuji TSUCHIKAWA, Sayaka MIYAMORI, Yoshiaki KATSURA