Patents Assigned to Sekisui Chemical Co., Ltd.
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Patent number: 12291632Abstract: The present invention provides an epoxy resin composition capable of exhibiting high moisture resistance and reducing reduction in adhesion at high temperature and high humidity. Provided is an epoxy resin composition containing: a modified polyvinyl acetal resin containing a hydrogen-bonding group-containing constitutional unit; and an epoxy resin, the modified polyvinyl acetal resin having an equilibrium moisture absorption of 5 to 20% by weight as measured with an infrared moisture meter after standing at 40° C. and 90% RH for seven days.Type: GrantFiled: September 10, 2019Date of Patent: May 6, 2025Assignee: SEKISUI CHEMICAL CO., LTD.Inventor: Shiori Tateno
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Publication number: 20250136815Abstract: The present invention provides a near-infrared transmitting black particle having high transmittance in the near-infrared region and low transmittance in the visible region. Provided is a near-infrared transmitting black particle, having a transmittance T600 (%) at a wavelength of 600 nm and a transmittance T900 (%) at a wavelength of 900 nm that satisfy the relation of the following formula (1) as measured using a spectrophotometer: T900?T600?60 (1).Type: ApplicationFiled: August 18, 2022Publication date: May 1, 2025Applicant: Sekisui Chemical Co., Ltd.Inventors: Masahiro ISHII, Hiroji FUKUI, Ren-de SUN, Mikitoshi SUEMATSU, Takuya KUDO
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Publication number: 20250136727Abstract: The present invention provides a chlorinated polyvinyl chloride resin, a resin composition for molding, and a molded body that are capable of suppressing a change in color tone and a decrease in tensile strength when contacting acidic liquid. Provided is a chlorinated polyvinyl chloride resin having a ratio (A/B) of a symmetry factor A to a symmetry factor B of 0.15 or greater and 2.60 or less in high-performance liquid chromatography measurement, the symmetry factor A being a symmetry factor of a peak observed in a retention time range from 2 to 4 minutes, the symmetry factor B being a symmetry factor of a peak observed in a retention time range from 10 to 18 minutes.Type: ApplicationFiled: September 22, 2022Publication date: May 1, 2025Applicant: Sekisui Chemical Co., Ltd.Inventors: Takuya SAWAI, Kento MURAKAMI, Yoshito ARAI
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Patent number: 12288629Abstract: A conductive particle including a base particle and a conductive portion disposed on a surface of the base particle, in which a particle diameter of the conductive particle is 30 ?m or more, and a ratio of a resistance value (R20) of the conductive particle after loading and unloading up to 20% compression deformation of the conductive particle are repeated 20 times to a resistance value (R1) of the conductive particle after loading and unloading up to 20% compression deformation of the conductive particle are performed once is 1.5 or less.Type: GrantFiled: July 30, 2020Date of Patent: April 29, 2025Assignee: SEKISUI CHEMICAL CO., LTD.Inventor: Yuto Dobashi
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Patent number: 12283693Abstract: A positive electrode (1) for non-aqueous electrolyte secondary batteries, including a collector (11) and an active material layer (12), wherein a spreading resistance distribution of the layer (12) shows a profile with a sum of frequencies of resistance values 4.0 to 6.0 (log ?) accounting for 0.0 to 5.0% relative to a total, 100%, of frequencies of resistance values 4.0 to 12.5 (log ?). A positive electrode (1) for non-aqueous electrolyte secondary batteries, including a collector (11) and an active material layer (12), wherein the layer (12) includes an active material and a conductive carbon material, and an amount of a low-resistance conductive carbon material having a resistivity of 0.10 ?·cm or less is 0.5% by mass or less, based on a total mass of the layer (12).Type: GrantFiled: March 18, 2022Date of Patent: April 22, 2025Assignee: SEKISUI CHEMICAL CO., LTD.Inventors: Hikaru Yoshikawa, Yuichi Sabi
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Publication number: 20250125532Abstract: Provided are a radio wave reflector and building material that have flexibility and reflect radio waves while the intensity thereof is maintained. A radio wave reflector 11 for reflecting radio waves, wherein when the radio wave reflector 11 is in a flat state and is caused to reflect a radio wave at an incident angle of an incident wave of 15 degrees or more and 75 degrees or less, the intensity of a reflective wave as specular reflection of the incident wave is ?30 dB or more relative to the intensity of the incident wave at least at one frequency; the change rate of the surface resistivity R2 of the radio wave reflector 11 curved along a curved surface with a curvature radius of 200 mm with respect to surface resistivity R1 of the radio wave reflector 11 in a flat state is ?10% or more and 10% or less; and the radio wave reflector 11 has a flexural modulus of 0.05 GPa or more and 4 GPa or less.Type: ApplicationFiled: December 23, 2022Publication date: April 17, 2025Applicant: SEKISUI CHEMICAL CO., LTD.Inventor: Hiroyuki NOMOTO
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Patent number: 12278368Abstract: A positive electrode is for a non-aqueous electrolyte secondary battery. The positive electrode includes: a current collector including a current collector main body formed of a metal material; and an active material layer on the current collector. The active material layer includes an active material which includes a compound having an olivine type crystal structure. A volume density of the active material layer is 2.2 g/cm3 to 2.7 g/cm3. The positive electrode suffers no damage when bent once in accordance with a 90° folding endurance test method specified in Japanese Industrial Standards (JIS) P 8115 (2001).Type: GrantFiled: March 18, 2022Date of Patent: April 15, 2025Assignee: SEKISUI CHEMICAL CO., LTD.Inventors: Hikaru Yoshikawa, Yuichi Sabi
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Publication number: 20250109269Abstract: The present invention provides a thermally expandable microcapsule that enables the production of a light molded article with high expansion ratio and excellent appearance, as well as a foamable resin composition and a foam that are produced using the thermally expandable microcapsule. Provided is a thermally expandable microcapsule including: a shell containing a polymer; and a volatile expansion agent as a core agent encapsulated by the shell, the shell containing silicon dioxide and a polymer obtained by polymerizing a monomer composition containing a carbonyl group-containing monomer, the thermally expandable microcapsule having a volatile content of 0.55% by weight or more and 2% by weight or less upon standing for one hour at a temperature of 70° C.Type: ApplicationFiled: January 18, 2023Publication date: April 3, 2025Applicant: SEKISUI CHEMICAL CO., LTD.Inventors: Yasuhiro KAWAGUCHI, Kouji TAMURA
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Publication number: 20250109322Abstract: The present invention aims to provide an adhesive tape having excellent adhesion and exhibiting excellent holding power even under prolonged shear stress at high temperature. Provided is an adhesive tape including an adhesive layer, the adhesive layer containing an acrylic copolymer containing a structural unit derived from an alkyl (meth)acrylate and a structural unit derived from an olefin polymer having a polymerizable unsaturated double bond at an end, the adhesive layer having a swelling ratio of 40 or greater and 500 or less when immersed in tetrahydrofuran at a temperature of 25° C. for 24 hours.Type: ApplicationFiled: January 18, 2023Publication date: April 3, 2025Applicant: Sekisui Chemical Co., Ltd.Inventors: Nagisa TSUJI, Yudai OGATA
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Patent number: 12264311Abstract: Provided is a nucleic acid isolation method whereby it becomes possible to extract a nucleic acid in a simple manner without the need to use an alcohol. A nucleic acid isolation method, comprising the steps of: mixing a specimen containing a nucleic acid with an extraction solution to disperse the nucleic acid in the extraction solution; bringing the extraction solution containing the nucleic acid into contact with an anionic adsorbent; bringing a washing solution into contact with the anionic adsorbent; and bringing a collection solution into contact with the anionic adsorbent, the extraction solution containing a protein denaturant, the washing solution containing a basic compound and having a pH value equal to or less than a pKa value of a conjugate acid of the basic compound, and the collection solution having a pH value equal to or more than the pKa value of the conjugate acid of the basic compound.Type: GrantFiled: January 17, 2020Date of Patent: April 1, 2025Assignees: SEKISUI CHEMICAL CO., LTD., SEKISUI MEDICAL CO., LTD.Inventors: Takamasa Kouno, Nobuhiko Inui, Tsutomu Nakamura, Tomoya Sasaki, Sou Yamaguchi, Katsura Uchida
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Patent number: 12264239Abstract: The present invention provides a chlorinated polyvinyl chloride resin that provides a molded article having excellent heat cycle characteristics and excellent weather resistance, as well as a resin composition for molding and a molded article each including the chlorinated polyvinyl chloride resin. Provided is a chlorinated polyvinyl chloride resin, containing two components including a A30 component and a B30 component, the A30 component and the B30 component being determined by measuring the resin by a solid echo method using pulse NMR at 30° C. to give a free induction decay curve of 1H spin-spin relaxation, and subjecting the free induction decay curve to waveform separation into two curves derived from the A30 component and the B30 component in order of shorter relaxation time using the least square method, and having a ratio of T5B to TB [T5B/TB] of 96% or more and 120% or less, where TB is a relaxation time of the B30 component and T5B is a relaxation time of the B30 component after heating at 200° C.Type: GrantFiled: March 30, 2021Date of Patent: April 1, 2025Assignee: SEKISUI CHEMICAL CO., LTD.Inventors: Mitsuo Matsumoto, Ryota Yamasugi, Nami Nakajima, Yasunari Kusaka
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Publication number: 20250100251Abstract: Provided is an interlayer film for laminated glass capable of suppressing color migration and enhancing the handling property of the interlayer film. An interlayer film for laminated glass according to the present invention contains a thermoplastic resin, a first plasticizer having a solubility parameter of less than 18.0 (J/cm3)0.5, and a second plasticizer having a solubility parameter of 18.0 (J/cm3)0.5 or more.Type: ApplicationFiled: November 30, 2022Publication date: March 27, 2025Applicant: SEKISUI CHEMICAL CO., LTD.Inventors: Moyuru OKAJIMA, Atsushi NOHARA, Yuitsu SUGAMI
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Publication number: 20250105525Abstract: Provided is a radio wave reflector that can reflect radio waves while the intensity thereof is maintained and that can maintain the scenery. The radio wave reflector of the present invention is a radio wave reflector for reflecting radio waves, wherein the intensity of a reflective wave as specular reflection of an incident wave is ?30 dB or more relative to the intensity of the incident wave at a frequency, and the radio wave reflector has a total light transmittance of 65% or more as measured using a standard illuminant D65.Type: ApplicationFiled: December 23, 2022Publication date: March 27, 2025Applicant: SEKISUI CHEMICAL CO., LTDInventors: Hiroyuki NOMOTO, Yasuaki IDE, Munehiro HATAI
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Patent number: 12259076Abstract: An electrofusion joint includes a main body and a heating wire. The main body is configured to be connected to a resin pipe containing a thermoplastic resin. The heating wire is in the main body. The heating wire includes a conducting wire and an insulating cover film that is around the conducting wire. The insulating cover film has a melting point of at least 230 degrees.Type: GrantFiled: September 28, 2020Date of Patent: March 25, 2025Assignee: SEKISUI CHEMICAL CO., LTD.Inventors: Ayaka Kitagawa, Hiroaki Kondou, Kouzou Makino
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Publication number: 20250091327Abstract: An interlayer film for laminated glass, including a thermoplastic resin and a filler (A) having visible light reflection performance.Type: ApplicationFiled: January 18, 2023Publication date: March 20, 2025Applicant: SEKISUI CHEMICAL CO., LTD.Inventors: Atsushi NOHARA, Kazuhiko NAKAYAMA
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Patent number: 12252577Abstract: The present invention provides a chlorinated polyvinyl chloride resin that enables the production of a molded article that maintains high adhesion strength even when used in a form subjected to high pressure and is less susceptible to defects such as cracks due to insufficient strength, as well as a resin composition for molding and a molded article each including the chlorinated polyvinyl chloride resin. Provided is a chlorinated polyvinyl chloride resin, containing two components including a A30 component and a B30 component, the A30 component and the B30 component being determined by measuring the resin by a solid echo method using pulse NMR at 30° C.Type: GrantFiled: March 30, 2021Date of Patent: March 18, 2025Assignee: SEKISUI CHEMICAL CO., LTD.Inventors: Ryota Yamasugi, Mitsuo Matsumoto, Nami Nakajima, Yasunari Kusaka
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Publication number: 20250083419Abstract: The resin film of the present invention is such that, when one surface of a laminated glass obtained by adhesion of two sheets of standard glass having a thickness of 2.5 mm with the resin film being interposed is irradiated with simulated solar light by a solar simulator in a perpendicular direction, a ratio between a maximum value and a minimum value with respect to brightness measured in directions at angles relative to a direction perpendicular to other surface of the laminated glass, of 30°, 45°, 60° and 75°, is 0.1 or more. The laminated glass of the present invention comprises the resin film of the present invention and paired glass members, in which the resin film is placed between the paired glass members.Type: ApplicationFiled: May 31, 2022Publication date: March 13, 2025Applicant: SEKISUI CHEMICAL CO., LTD.Inventor: Yuusuke OOTA
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Publication number: 20250083420Abstract: An interlayer film for laminated glass including a first resin layer including a thermoplastic resin and a second resin layer including a thermoplastic resin, wherein, for laminated glass made by adhering two clear glass plates to each other via the interlayer film for laminated glass, a visible light reflectance Rv1 measured on a surface on the first resin layer side is 10% or more and a visible light reflectance (Rv2) measured on a surface on the second resin layer side is 7% or less.Type: ApplicationFiled: January 18, 2023Publication date: March 13, 2025Applicant: SEKISUI CHEMICAL CO., LTD.Inventors: Atsushi NOHARA, Kazuhiko NAKAYAMA, Sho FUJIOKA
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Patent number: 12241907Abstract: A chip that does not require high-accuracy discharge amount control for a liquid delivery pump and can suppress entrainment of air bubbles, including: a first flow path; a second flow path; a merging portion provided on a downstream end portion side of the first flow path and merge the first fluid and the second fluid; a first connection flow path connecting the first flow path and the second flow path at the merging portion and have a liquid delivery resistance higher than the first flow path; a degassing flow path connecting to the second flow path on a downstream side of the first connection flow path; a third flow path provided on a downstream side of the merging portion; and a second connection flow path connecting the first flow path and the third flow path and have a liquid delivery resistance higher than the first flow path.Type: GrantFiled: April 20, 2020Date of Patent: March 4, 2025Assignee: SEKISUI CHEMICAL CO., LTD.Inventors: Kazuhiko Imamura, Tsutomu Nakamura, Nobuhiko Inui, Ryousuke Takahashi
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Patent number: 12245353Abstract: An irradiator includes: a piezoelectric transformer accommodated in a housing; a first electrode connected to the piezoelectric transformer, to which a voltage is applied from the piezoelectric transformer; and an irradiation opening that ejects at least one of a plasma generated by the first electrode and an active gas generated by the plasma. At least a part of the first electrode is located between the piezoelectric transformer and the irradiation opening.Type: GrantFiled: March 22, 2021Date of Patent: March 4, 2025Assignee: SEKISUI CHEMICAL CO., LTD.Inventors: Tatsuya Matsuo, Yu Nagahara, Takaya Oshita, Naomichi Saitou