Patents Assigned to PMC Corporation
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Patent number: 11945927Abstract: [Problem] An object of the present invention is to provide a foam including a thermoplastic resin and rubber as a main component, in which a micronized product of a cellulose fiber is uniformly dispersed, and uniformity and mechanical properties are excellent. [Solution] A foam includes a modified cellulose fiber (A) covalently bonded with a diene-based polymer, a thermoplastic resin and/or rubber (B), and a diene-based polymer (C) having a functional group capable of covalently bonding with a cellulose fiber, in which the fiber (A) is micronized, the fiber (A) has a content of 0.05 to 20% by mass, and the thermoplastic resin and/or rubber (B) has a glass transition point of ?130° C. to 120° C.Type: GrantFiled: February 26, 2020Date of Patent: April 2, 2024Assignee: SEIKO PMC CORPORATIONInventors: Ryo Miyamori, Daisuke Kuroki, Hideya Sekiguchi, Akihiro Sato
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Patent number: 11819922Abstract: The present invention addresses the problem of providing a method that enables easy manufacturing of silver nanowires which have an average diameter smaller than those obtained from methods in the related art and in which the proportion of large diameter silver nanowires is reduced. Provided is a method for manufacturing silver nanowires, in which the silver nanowires are obtained from a silver salt using the silver salt, a halide salt, and a growth control agent in a polyol, and at least one selected from the group consisting of ?-angelica lactone, phthalide, and a compound represented by General Formula (1) below (in General Formula (1), R1 and R3 each represent an alkyl group having 1-4 carbon atoms, and R2 represents a hydrogen atom, a hydroxyl group, an alkoxyl group having 1-4 carbon atoms, or a acyloxy group having 2-6 carbon atoms) is further used as a furanone derivative (a).Type: GrantFiled: February 7, 2020Date of Patent: November 21, 2023Assignee: SEIKO PMC CORPORATIONInventor: Yasuhiro Ueta
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Publication number: 20230126120Abstract: In view of the problem with the prior art, the present invention addresses the following problems: providing a method that can suppress the generation of fine silver particles in a silver nanowire dispersion better than prior methods; and inhibiting, by a convenient method, particulation of silver nanowires on the anode side. A solution is a silver nanowire dispersion that contains silver nanowires, a dispersion solvent, and a chelating agent with the average diameter of the silver nanowires being not more than 100 nm, the silver nanowire dispersion being characterized in that the chelating agent content is 0.1 to 1,000 ?mol/g with reference to the silver nanowire content, and the chelating agent is a prescribed aromatic heterocyclic compound having at least one imine skeleton in the molecule.Type: ApplicationFiled: March 30, 2021Publication date: April 27, 2023Applicant: SEIKO PMC CORPORATIONInventors: Yasuhiro UETA, Tomoaki KAWAGUCHI
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Publication number: 20220378043Abstract: [Problem] A treatment agent having an excellent ability to remove biofilms and a biofilm treatment method in which the treatment agent is used are provided. [Solution] A biofilm treatment agent characterized by containing at least A1 and/or A2 below. A1: An aromatic monohydric alcohol. A2: An anthranilic acid analog and a biosurfactant. Preferably, the biofilm treatment agent is characterized by containing at least an aromatic monohydric alcohol, an anthranilic acid analog, a biosurfactant, and a synthetic surfactant.Type: ApplicationFiled: May 22, 2020Publication date: December 1, 2022Applicant: SEIKO PMC CORPORATIONInventors: Takeshi KUBO, Ryoji IGARASHI
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Patent number: 11446738Abstract: The present invention is a method for manufacturing silver nanowires, including using a growth control agent and a halide salt in a polyol to obtain silver nanowires from a silver salt, and further using an ?-hydroxycarbonyl compound (a) represented by formula (1) below: (in general formula (1), R indicates any of a hydrogen atom and a hydrocarbon group having 1 to 6 carbon atoms).Type: GrantFiled: May 16, 2019Date of Patent: September 20, 2022Assignee: SEIKO PMC CORPORATIONInventors: Yasuhiro Ueta, Munetoshi Kurimura
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Patent number: 11400693Abstract: The present disclosure relates to a weather resistance improver including a compound (A) and a compound (B), wherein the compound (A) is a compound having the following structure (1), and the compound (B) is a compound having the following structure (2) or a salt thereof. According to the weather resistance improver, it is possible to suppress deterioration of a transparent conductive film using metal nanowires even under any conditions of long-term exposure to sunlight, long-term exposure to artificial light, and high-temperature/high-humidity.Type: GrantFiled: June 9, 2017Date of Patent: August 2, 2022Assignee: SEIKO PMC CORPORATIONInventor: Toshiyuki Hasegawa
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Publication number: 20220227948Abstract: The resin composition production method includes a step in which a cellulose fiber composition containing 5 to 45 parts by mass of water with respect to a total of 100 parts by mass of cellulose fibers (A) and an acrylic resin and/or a styrene acrylic resin (B) is kneaded with a thermoplastic resin (C), and water is removed until the water content after kneading falls to 1% or less. The resin composition production method is also characterized in that: 20 parts by mass or more and 200 parts by mass or less of the resin (B) is blended with respect to 100 parts by mass of the cellulose fibers (A), the dissolution amount of the resin (B) in 100 g of water at 25° C. is less than 1 g, and the glass transition temperature of the resin (B) is 40 to 150° C.Type: ApplicationFiled: April 27, 2020Publication date: July 21, 2022Applicant: SEIKO PMC CORPORATIONInventors: Yuya TERAO, Takashi KAWABATA, Takayuki TSUNODA, Takafumi SEKIGUCHI
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Publication number: 20220195133Abstract: To provide a resin composition that allows the effect of cellulose fibers added to be exerted sufficiently and allows a molded body having good mechanical strength to be produced, a method for producing the resin composition, a cellulose fiber composition, and a molded article using the resin composition. The resin composition of the present invention contains: an olefin-based polymer (A); cellulose fibers (B); an amide compound (C) having at least one hydrocarbon group; and an acrylic-based polymer (D) that contains a first structural unit based on an alkyl (meth)acrylate and a second structural unit based on an acrylic monomer having an amido group and has a weight average molecular weight of 5,000 to 100,000.Type: ApplicationFiled: April 23, 2020Publication date: June 23, 2022Applicants: DIC Corporation, SEIKO PMC CORPORATIONInventors: Hironobu TAKIZAWA, Yoko TAKEUCHI, Yutaka TAKEZAWA, Ryuzaburo NAKAGIRI, Yuya TERAO
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Publication number: 20220168806Abstract: The present invention addresses the problem of providing a method that enables easy manufacturing of silver nanowires which have an average diameter smaller than those obtained from methods in the related art and in which the proportion of large diameter silver nanowires is reduced. Provided is a method for manufacturing silver nanowires, in which the silver nanowires are obtained from a silver salt using the silver salt, a halide salt, and a growth control agent in a polyol, and at least one selected from the group consisting of ?-angelica lactone, phthalide, and a compound represented by General Formula (1) below (in General Formula (1), R1 and R3 each represent a alkyl group having 1-4 carbon atoms, and R2 represents a hydrogen atom, a hydroxyl group, an alkoxyl group having 1-4 carbon atoms, or a acyloxy group having 2-6 carbon atoms) is further used as a furanone derivative (a).Type: ApplicationFiled: February 7, 2020Publication date: June 2, 2022Applicant: SEIKO PMC CORPORATIONInventor: Yasuhiro UETA
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Publication number: 20210292492Abstract: The purpose of the present invention is to manufacture a bright-hued modified cellulose fiber blended resin composition more easily than before while utilizing a method of defibrillating a cellulose fiber and uniformly dispersing a cellulose nanofiber in a resin. A method for manufacturing the modified cellulose fiber blended resin composition includes: (i) a step of adding 5 to 45 parts by mass of water with respect to 100 parts by mass of a modified cellulose fiber (A) modified with a hydrophobizing agent (a) to obtain a hydrous cellulose fiber (A?); and (ii) a step of defibrillating the modified cellulose fiber while kneading the hydrous cellulose fiber (A?) with a thermoplastic resin and/or a rubber (B), and removing the water to attain a water content ratio of 1% or less after kneading.Type: ApplicationFiled: January 17, 2020Publication date: September 23, 2021Applicant: SEIKO PMC CORPORATIONInventors: Tomoaki YOSHIMURA, Shuhei YAMADA, Takashi KAWABATA, Ryuzaburo NAKAGIRI, Yuya TERAO
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Patent number: 10513573Abstract: Provided is a process for silver nanowire production in which the major-axis length of the silver nanowires can be controlled in a wide range and an agent for controlling the growth of silver nanowires. A process for silver nanowire production which is characterized in that an agent for controlling the growth of silver nanowires which comprises a polymer obtained by polymerizing one or more polymerizable monomers comprising an N-substituted (meth)acrylamide is reacted with a silver compound in a polyol at 25-180° C. The agent for controlling the growth of silver nanowires is characterized by comprising a polymer which has units of an N-substituted (meth)acrylamide as a polymerizable monomer.Type: GrantFiled: March 1, 2017Date of Patent: December 24, 2019Assignee: Seiko PMC CorporationInventors: Tomoaki Kawaguchi, Toshiyuki Hasegawa
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Patent number: 10184013Abstract: Provided are modified plant fibers suitable for addition to rubber; an additive for rubber comprising the modified plant fibers which can be micronized and dispersed easily and highly when adding to rubber; a method of preparing the additive for rubber; and a rubber composition comprising the additive for rubber. Modified plant fibers (A) in which plant fibers (a) and a modified synthetic rubber (B) are covalently bonded wherein the ratio of the modified synthetic rubber (B) relative to 100 parts by weight of the plant fibers (a) is 5 to 100 parts by weight. An additive for rubber comprising 20 to 75 weight % of the modified plant fibers (A) according to claim 1 and 25 to 80 weight % of a processing agent for rubber (C), wherein the number average molecular weight of the processing agent for rubber (C) is 400 to 60,000, and the glass transition point of the processing agent for rubber (C) is 100° C. or less, and wherein the additive for rubber includes plant fibers in the ratio of 10 to 65 weight %.Type: GrantFiled: June 22, 2016Date of Patent: January 22, 2019Assignee: SEIKO PMC CORPORATIONInventors: Ryo Miyamori, Syuichi Ohira, Daisuke Kuroki
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Patent number: 9630250Abstract: Provided is a process for silver nanowire production in which the major-axis length of the silver nanowires can be controlled in a wide range and an agent for controlling the growth of silver nanowires. A process for silver nanowire production which is characterized in that an agent for controlling the growth of silver nanowires which comprises a polymer obtained by polymerizing one or more polymerizable monomers comprising an N-substituted (meth)acrylamide is reacted with a silver compound in a polyol at 25-180° C. The agent for controlling the growth of silver nanowires is characterized by comprising a polymer which has units of an N-substituted (meth)acrylamide as a polymerizable monomer.Type: GrantFiled: October 28, 2011Date of Patent: April 25, 2017Assignee: Seiko PMC CorporationInventors: Tomoaki Kawaguchi, Toshiyuki Hasegawa
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Patent number: 9512304Abstract: The present invention provides a method for producing a resin composition, which, by means of simple steps, can uniformly disperse microfibrillated plant fiber in a highly hydrophobic resin and can impart enhanced mechanical strength to a molding material obtained by molding the resin composition. The present invention further provides a resin composition having excellent heat resistance and low linear thermal expansion. The present invention relates to a method for producing a resin composition, the method including a step of mixing a thermoplastic resin or thermosetting resin (A), and modified plant fiber (b) or modified microfibrillated plant fiber (B), in the presence of an organic liquid (C), the modified plant fiber (b) or modified microfibrillated plant fiber (B) being obtained by modification with an alkyl or alkenyl succinic anhydride in a liquid capable of swelling microfibrillated plant fiber (B?) or plant fiber (b).Type: GrantFiled: February 26, 2013Date of Patent: December 6, 2016Assignees: DIC Corporation, Seiko PMC Corporation, Kyoto University, Kyoto Municipal Institute of Industrial Technology and CultureInventors: Hiroyuki Yano, Akihiro Sato, Tomoaki Yoshimura, Yuko Igarashi, Daisuke Kabusaki, Fumiaki Nakatsubo, Hiroaki Okumura, Takeshi Semba, Kazuo Kitagawa, Hiromasa Kataoka, Kazuhiro Shintani
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Patent number: 9469714Abstract: The invention provides a cationic emulsion having a polymer core-shell structure that exhibits excellent substrate adhesiveness, water resistance, alcohol resistance, and high gloss when used in an aqueous ink, and exhibits excellent color developing properties and water resistance when used in a recording medium, specifically, a cationic emulsion having a polymer core-shell structure comprising component (A) and component (B) and having a mass ratio of component (A):component (B) of 25:75-75:25. (A) Emulsion polymer core component obtained by polymerizing a monomer having a vinyl chloride monomer as a constituent. (B) Emulsion polymer shell component, having a structure obtained by polymerizing a monomer mixture having, as constituents: styrenes and a compound of formula (1); or styrenes, a compound of formula (1), and a (meth)acrylic ester having 1-22 carbon atoms in the ester part as a compound (2); in which the compound of formula (1) is 20-45 mass % in the monomer mixture.Type: GrantFiled: February 4, 2014Date of Patent: October 18, 2016Assignees: SEIKO PMC CORPORATION, NISSIN CHEMICAL INDUSTRY CO., LTD.Inventors: Shiro Umeuchi, Kenji Nasu, Yasuhiro Mitta
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Publication number: 20160118156Abstract: The present invention provides a metal nanowire-containing composition that has high compatibility between high preservation stability and coating suitability and that can produce a coating film having high compatibility among high conductivity, high transparency, and low turbidity and high compatibility among high abrasion resistance, water resistance, alcohol resistance, and adhesiveness to a substrate. The metal nanowire-containing composition contains a metal nanowire, a binder, a surfactant, and a solvent, wherein the binder contains a binder component (A) being a polysaccharide; and a binder component (B) being at least one selected from aqueous polyester resins, aqueous polyurethane resins, aqueous acrylic resins, and aqueous epoxy resins.Type: ApplicationFiled: May 21, 2014Publication date: April 28, 2016Applicant: SEIKO PMC CORPORATIONInventors: Tomoaki KAWAGUCHI, Toshiyuki HASEGAWA, Munetoshi KURIMURA
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Publication number: 20150353670Abstract: The invention provides a cationic emulsion having a polymer core-shell structure that exhibits excellent substrate adhesiveness, water resistance, alcohol resistance, and high gloss when used in an aqueous ink, and exhibits excellent color developing properties and water resistance when used in a recording medium, specifically, a cationic emulsion having a polymer core-shell structure comprising component (A) and component (B) and having a mass ratio of component (A):component (B) of 25:75-75:25. (A) Emulsion polymer core component obtained by polymerizing a monomer having a vinyl chloride monomer as a constituent. (B) Emulsion polymer shell component, having a structure obtained by polymerizing a monomer mixture having, as constituents: styrenes and a compound of formula (1); or styrenes, a compound of formula (1), and a (meth)acrylic ester having 1-22 carbon atoms in the ester part as a compound (2); in which the compound of formula (1) is 20-45 mass % in the monomer mixture.Type: ApplicationFiled: February 4, 2014Publication date: December 10, 2015Applicants: NISSIN CHEMICAL INDUSTRY CO., LTD., SEIKO PMC CORPORATIONInventors: Shiro UMEUCHI, Kenji NASU, Yasuhiro MITTA
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Patent number: 9074077Abstract: The present invention relates to modified cellulose nanofibers obtained by neutralizing cationic groups of cationic cellulose nanofibers with an anionic additives. Moreover, the present invention relates to a resin composition containing the aforementioned modified cellulose nanofibers and a molding resin, and to a molded body obtained by molding the resin composition. Furthermore, the present invention relates to a production method of modified cellulose nanofibers comprising neutralizing cationic groups of cationic cellulose nanofibers with an anionic additives.Type: GrantFiled: March 12, 2012Date of Patent: July 7, 2015Assignees: DIC Corporation, Seiko PMC CorporationInventors: Tetsuya Harada, Satoshi Katano, Akihiro Sato, Kazuya Miyamoto
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Patent number: 9056969Abstract: This invention provides a polyolefin-based molded article containing microfibrillated plant fibers having high strength and high elastic modulus. Specifically, the present invention provides a composition comprising (1) a polymeric compound having a primary amino group, (2) a polymeric compound modified with maleic anhydride, (3) microfibrillated plant fibers, and (4) a polyolefin; and a molded article obtained by subjecting the composition to heat treatment.Type: GrantFiled: October 21, 2010Date of Patent: June 16, 2015Assignees: NIPPON PAPER INDUSTRIES CO., LTD., DIC Corporation, Seiko PMC Corporation, Kyoto UniversityInventors: Hiroyuki Yano, Katsuhito Suzuki, Akihiro Sato
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Patent number: 8658037Abstract: The present invention provides a method for determining the physiological state of a microbial community, which rapidly and precisely determines the physiological state of a microbial community present in a treatment tank of a wastewater biological treatment facility; and a wastewater treatment method utilizing the same.Type: GrantFiled: July 3, 2009Date of Patent: February 25, 2014Assignee: Seiko PMC CorporationInventors: Ryoji Igarashi, Takuji Yamamoto