Patents by Inventor Takuro Niimura
Takuro Niimura 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).
-
Publication number: 20240101760Abstract: The present invention relates to a method for producing an acetalization product of an ethylene/vinyl alcohol copolymer by acetalization of an ethylene/vinyl alcohol copolymer, wherein the ethylene/vinyl alcohol copolymer is a porous object.Type: ApplicationFiled: March 28, 2022Publication date: March 28, 2024Applicant: KURARAY CO., LTD.Inventors: Akio TAKASUGI, Takuro NIIMURA, Atsuhiro NAKAHARA, Yoshiaki ASANUMA
-
Publication number: 20240002645Abstract: The present invention relates to an ionomer resin comprising a carboxylic acid ester unit (A), a carboxylic acid unit (B), a neutralized carboxylic acid unit (C), and an ethylene unit (D), wherein, based on the total of monomer units constituting the ionomer resin, the content of the carboxylic acid ester unit (A) is 0.01 to 1.8 mol %, and the total content of the carboxylic acid ester unit (A), the carboxylic acid unit (B), and the neutralized carboxylic acid unit (C) is 6 to 10 mol %, and based on measurement of the molecular weight in terms of polyethylene by GPC with the carboxylic acid unit (B) and the neutralized carboxylic acid unit (C) being converted into a methyl carboxylate unit, the ratio of a low-molecular-weight component having a molecular weight of 2,500 g/mol or less obtained from an integral molecular weight distribution curve is 2.6 to 4.0 mass %, and the number average molecular weight is 8,000 to 14,000 g/mol.Type: ApplicationFiled: November 19, 2021Publication date: January 4, 2024Applicant: Kuraray Europe GmbHInventors: Atsuhiro NAKAHARA, Takuro NIIMURA, Kenta TAKEMOTO, Yoshiaki ASANUMA
-
Publication number: 20230331887Abstract: The present invention relates to an ionomer resin, comprising a (meth)acrylic acid unit (A), a neutralized (meth)acrylic acid unit (B) and an ethylene unit (C), wherein a total content of the unit (A) and the unit (B) is 6 to 10% by mole based on all monomer units constituting the ionomer resin, and the content of a transition metal in the ionomer resin is 0.01 to 100 mg/kg.Type: ApplicationFiled: September 22, 2021Publication date: October 19, 2023Applicant: KURARAY EUROPE GMBHInventors: Takuro NIIMURA, Kenta TAKEMOTO, Atsuhiro NAKAHARA, Yoshiaki ASANUMA
-
Publication number: 20230069427Abstract: The present invention relates to a resin composition, comprising: a modified vinyl acetal resin which comprises 20 to 80 mol % of ethylene units and 4 to 76 mol % of vinyl alcohol units based on all monomer units constituting the resin, and has an acetalization degree of 5 to 80 mol %; and an alkali metal salt and/or an alkaline earth metal salt of a strong acid, wherein a total content of the alkali metal salt and/or the alkaline earth metal salt of the strong acid is 0.0005 to 0.06 part by mass with respect to 100 parts by mass of the modified vinyl acetal resin.Type: ApplicationFiled: December 18, 2020Publication date: March 2, 2023Applicant: KURARAY CO., LTD.Inventors: Takuro NIIMURA, Akio TAKASUGI, Atsuhiro NAKAHARA, Yoshiaki ASANUMA
-
Publication number: 20230025550Abstract: The present invention relates to an ionomer resin, comprising: a (meth)acrylic acid unit (A); a neutralized (meth)acrylic acid unit (B); and an ethylene unit (C), wherein the total amount of the unit (A) and the unit (B) is from 6 to 10 mol % based on the entire monomeric units constituting the ionomer resin, and wherein the amount of a salt composed of a strong acid and a strong base in the ionomer resin is from 1 to 400 mg/kg.Type: ApplicationFiled: December 7, 2020Publication date: January 26, 2023Applicant: KURARAY CO., LTD.Inventors: Tomoka SHIROUCHI, Kenta TAKEMOTO, Takuro NIIMURA, Atsuhiro NAKAHARA, Yoshiaki ASANUMA
-
Publication number: 20230018856Abstract: The present invention relates to a method of manufacturing an ionomer resin, comprising the steps of: (i) adding a poor solvent to a crude ionomer resin solution comprising a (meth)acrylic acid unit (A), a neutralized (meth)acrylic acid unit (B) and an ethylene unit (C) to allow a granular resin with a peak top particle size of from 50 to 700 ?m to be precipitated; and (ii) washing the precipitated granular resin with a washing solution; wherein the total amount of the unit (A) and the unit (B) is from 6 to 10 mol % based on the entire monomeric units constituting the crude ionomer resin.Type: ApplicationFiled: December 7, 2020Publication date: January 19, 2023Applicant: KURARAY CO., LTD.Inventors: Tomoka SHIROUCHI, Kenta TAKEMOTO, Takuro NIIMURA, Atsuhiro NAKAHARA, Yoshiaki ASANUMA
-
Publication number: 20220379539Abstract: A resin film comprising a multilayer structure acrylic polymer and the film having an acid value of not more than 0.018 mmol/g in an acetone insoluble matter, an acid value of not more than 0.012 mmol/g in an acetone soluble matter, a glass transition temperature of not less than 80° C. and a thickness of 5 to 300 ?m is obtained by a method comprising emulsion polymerization for producing a latex comprising multilayer structure acrylic polymer, coagulating the latex comprising the multilayer structure acrylic polymer to obtain a slurry, washing and dehydrating the slurry, drying the dehydrated slurry to remove the multilayer structure acrylic polymer, mixing 0 to 35% by mass of an acrylic resin and 65 to 100% by mass of the removed multilayer structure acrylic polymer and subjecting the resultant mixture melted to an extrusion molding.Type: ApplicationFiled: August 8, 2022Publication date: December 1, 2022Applicant: KURARAY CO., LTD.Inventors: Takuro NIIMURA, Taketomo YAMASHITA, Atsuhiro NAKAHARA, Nariaki FUJII, Tomoyuki MATSUI
-
Patent number: 11485847Abstract: The present invention provides a methacrylic resin composition comprising 75 to 99.8 mass % of a methacrylic resin [A], 0.1 to 15 mass % of a UV absorber [B], and 0.1 to 10 mass % of a polymer [C] having an SP value of 6.0 to 9.7 (cal/cm3)1/2 calculated by the Fedors method.Type: GrantFiled: December 20, 2018Date of Patent: November 1, 2022Assignee: KURARAY CO., LTD.Inventors: Shigeru Sakamoto, Takuro Niimura, Taketomo Yamashita, Atsuhiro Nakahara
-
Publication number: 20220204735Abstract: The problem to be solved by the invention is to provide an ionomer having excellent transparency, maintaining a high elastic modulus at high temperatures, being less coloration, and having a reduced odor during molding processing. The means for solving the problem is an ionomer comprising 0.05 to 1.0 mol % of (meth)acrylic acid ester units, 4.5 to 9.0 mol % of carboxylic acid units, 0.65 to 3.0 mol % of carboxylic acid neutralized product units, and ethylene units, based on the total monomer units which constitute the resin, with the total content of the (meth)acrylic acid ester units, the carboxylic acid units, and the carboxylic acid neutralized product units being 7.0 to 10 mol %.Type: ApplicationFiled: May 22, 2020Publication date: June 30, 2022Applicant: KURARAY CO., LTD.Inventors: Atsuhiro NAKAHARA, Takuro NIIMURA, Tomoka YAMAGUCHI, Yoshiaki ASANUMA, Takahiro TSUKAHARA
-
Publication number: 20220184930Abstract: The problem to be solved of the present invention is to provide a modified vinyl acetal resin for an interlayer film of laminated glass having excellent transparency, impact resistance, heat resistance and molding ability. The means for solving the problem is a modified vinyl acetal resin for an interlayer film of laminated glass comprising 25 to 60 mol % of ethylene units and 24 to 71% by mol of vinyl alcohol units, based on all the monomer units constituting the resin, and having the acetalization degree of 5 mol % or more and less than 40 mol %.Type: ApplicationFiled: March 18, 2020Publication date: June 16, 2022Applicant: KURARAY CO., LTD.Inventors: Takuro NIIMURA, Akio TAKASUGI, Atsuhiro NAKAHARA, Yoshiaki ASANUMA
-
Patent number: 11299600Abstract: A methacrylic resin composition comprising 100 parts by mass of a methacrylic resin having an amount of a terminal double bond of less than 0.012% by mole and an amount of a bonded sulfur atom of preferably less than 0.25% by mole; 5×10?6 to 9×10?3 part by mass of a metal element having an atomic number of not more than 20 (preferably lithium element and aluminum element); and 0.025 to 0.50 part by mass of a hindered phenol antioxidant such as 2,6-bis(1,1-dimethylethyl)-4-methylphenol, wherein the methacrylic resin composition, when being exposed to a nitrogen gas atmosphere at 290° C. for 15 minutes, has a thermogravimetric retention of not less than 98% by mass.Type: GrantFiled: February 21, 2018Date of Patent: April 12, 2022Assignee: KURARAY CO., LTD.Inventors: Nobutaka Hiraoka, Toru Abe, Taketomo Yamashita, Takuro Niimura, Atsuhiro Nakahara
-
Publication number: 20210054113Abstract: The present invention provides a multilayered acrylic polymer coagulate characterized in that the coagulate has a bulk density of 0.3 to 0.6 g/cm3 and a median diameter of 50 to 400 ?m and contains particles having a particle diameter of 75 or less in a proportion of 50% or less, and the amount of alkali metal and alkaline earth metal contained in the coagulate satisfies the following formula (1): ?(N/a)×(120?Tg)?100 ??(1) wherein N represents the amount of alkali metal and alkaline earth metal contained in the coagulate (mmol/kg); Tg represents the glass transition temperature (° C.) of the acetone-soluble matter of the coagulate; and a represents the valency of the alkali metal and alkaline earth metal contained in the coagulate.Type: ApplicationFiled: January 28, 2019Publication date: February 25, 2021Applicant: KURARAY CO., LTD.Inventors: Takuro NIIMURA, Masashi AKARI, Hiroshi OZAWA
-
Publication number: 20200377688Abstract: A methacrylic resin composition comprising 100 parts by mass of a methacrylic resin having an amount of a terminal double bond of less than 0.012% by mole and an amount of a bonded sulfur atom of preferably less than 0.25% by mole; 5×10?6 to 9×10?3 part by mass of a metal element having an atomic number of not more than 20 (preferably lithium element and aluminum element); and 0.025 to 0.50 part by mass of a hindered phenol antioxidant such as 2,6-bis(1,1-dimethylethyl)-4-methylphenol, wherein the methacrylic resin composition, when being exposed to a nitrogen gas atmosphere at 290° C. for 15 minutes, has a thermogravimetric retention of not less than 98% by mass.Type: ApplicationFiled: February 21, 2018Publication date: December 3, 2020Applicant: KURARAY CO., LTD.Inventors: Nobutaka HIRAOKA, Toru ABE, Taketomo YAMASHITA, Takuro NIIMURA, Atsuhiro NAKAHARA
-
Publication number: 20200024410Abstract: A resin film comprising a multilayer structure acrylic polymer and the film having an acid value of not more than 0.018 mmol/g in an acetone insoluble matter, an acid value of not more than 0.012 mmol/g in an acetone soluble matter, a glass transition temperature of not less than 80° C. and a thickness of 5 to 300 pm is obtained by a method comprising emulsion polymerization for producing a latex comprising multilayer structure acrylic polymer, coagulating the latex comprising the multilayer structure acrylic polymer to obtain a slurry, washing and dehydrating the slurry, drying the dehydrated slurry to remove the multilayer structure acrylic polymer, mixing 0 to 35% by mass of an acrylic resin and 65 to 100% by mass of the removed multilayer structure acrylic polymer and subjecting the resultant mixture melted to an extrusion molding.Type: ApplicationFiled: September 28, 2017Publication date: January 23, 2020Applicant: KURARAY CO. LTD.Inventors: Takuro NIIMURA, Taketomo YAMASHITA, Atsuhiro NAKAHARA, Nariaki FUJII, Tomoyuki MATSUI
-
Patent number: 9771438Abstract: A methacrylic resin composition, which comprises a methacrylic resin comprising 99.5% by mass or more of a structural unit derived from methyl methacrylate. The methacrylic resin includes less than 0.03 mol % of terminal double bonds based on the amount of the structural unit derived from methyl methacrylate and 0.2 mol % or more of combined sulfur atoms based on the amount of the structural unit derived from methyl methacrylate. The methacrylic resin composition has a melt flow rate of 8 g/10 min or more at 230° C. and a load of 3.8 kg.Type: GrantFiled: June 28, 2013Date of Patent: September 26, 2017Assignee: KURARAY Co., Ltd.Inventors: Hiroyuki Konishi, Takuro Niimura, Atsushi Matsumura, Hiroshi Ozawa
-
Publication number: 20150284520Abstract: A methacrylic resin composition, comprising a methacrylic resin which comprises 50-90% by mass of a structural unit derived from methyl methacrylate and 10-50% by mass of a structural unit derived from methacrylic acid alicyclic hydrocarbon ester, wherein the difference between the yellow index (YI4) at an optical path length of 200 mm for an injection molded article obtained at a cylinder temperature of 280° C. and a molding cycle of 4 minutes and the yellow index (YI1) at an optical path length of 200 mm for an injection molded article obtained at a cylinder temperature of 280° C. and a molding cycle of 1 minute is 3 or less, and the melt flow rate at a temperature of 230° C. and under a load of 3.8 kg is 5 g/10 min or more.Type: ApplicationFiled: November 8, 2013Publication date: October 8, 2015Applicant: KURARAY CO., LTD.Inventors: Hiroshi Ozawa, Takuro Niimura, Atsushi Matsumura, Atsuhiro Nakahara
-
Publication number: 20150166695Abstract: A methacrylic resin composition, which comprises a methacrylic resin comprising 99.5% by mass or more of a structural unit derived from methyl methacrylate. The methacrylic resin includes less than 0.03 mol % of terminal double bonds based on the amount of the structural unit derived from methyl methacrylate and 0.2 mol % or more of combined sulfur atoms based on the amount of the structural unit derived from methyl methacrylate. The methacrylic resin composition has a melt flow rate of 8 g/10 min or more at 230° C. and a load of 3.8 kg.Type: ApplicationFiled: June 28, 2013Publication date: June 18, 2015Applicant: KURARAY CO., LTD.Inventors: Hiroyuki Konishi, Takuro Niimura, Atsushi Matsumura, Hiroshi Ozawa
-
Publication number: 20150148508Abstract: A (meth)acrylic resin composition comprising not less than 99.5% by mass of (meth)acrylic resin composed of 80 to 100% by mass of a structural unit derived from methyl methacrylate and 0 to 20% by mass of a structural unit derived from acrylic acid ester, wherein a difference between YI4 and YI1 is not more than 3, in which the YI4 is a yellowness index at optical path length 200 mm of an article obtained by injection molding of the (meth)acrylic resin composition at a cylinder temperature of 280° C. and a molding cycle of 4 minutes, and the YI1 is a yellowness index at optical path length 200 mm of an article obtained by injection molding of the (meth)acrylic resin composition at a cylinder temperature of 280° C. and a molding cycle of 1 minute; and the (meth)acrylic resin composition has a melt flow rate under conditions of 230° C. and 3.8 kg load of not less than 25 g/10 min.Type: ApplicationFiled: April 22, 2013Publication date: May 28, 2015Applicant: KURARAY CO., LTD.Inventors: Takuro Niimura, Hiroyuki Konishi, Hiroshi Ozawa, Hidemi Kurita, Hideyuki Tamura
-
Publication number: 20150126697Abstract: A (meth)acrylic resin composition comprising 99.5% by mass or more of a (meth)acrylic resin composed of 80 to 100% by mass of a structural unit derived from methyl methacrylate and 0 to 20% by mass of a structural unit derived from an acrylic acid ester, wherein the (meth)acrylic resin composition has the rate of loss on heat of 0.5%/minute or less in a nitrogen atmosphere at 300° C., and the melt flow rate of 10 g/10 minutes or more under conditions of 230° C. and 3.8 kg load.Type: ApplicationFiled: April 22, 2013Publication date: May 7, 2015Applicant: KURARAY CO., LTD.Inventors: Takuro Niimura, Hiroyuki Konishi, Hiroshi Ozawa, Hidemi Kurita, Hideyuki Tamura