Patents Assigned to Kuraray Co., Ltd.
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Publication number: 20240191106Abstract: A pressure-sensitive adhesive composition that includes a styrenic block copolymer (A1) and an acrylic block copolymer (B), wherein (1) the melt viscosity of the styrenic block copolymer (A1) and the melt viscosity of the acrylic block copolymer (B) satisfy a specific relationship, (2) the mass ratio between the content of the styrenic block copolymer (A1) and the content of the acrylic block copolymer (B) in the pressure-sensitive adhesive composition is in a specific relationship, (3) the styrenic block copolymer (A1) is a hydrogenated product of a block copolymer (P1) including a specific polymer block, and (4) the acrylic block copolymer (B) includes a specific polymer block and has a number average molecular weight in a specific range.Type: ApplicationFiled: March 24, 2022Publication date: June 13, 2024Applicant: KURARAY CO., LTD.Inventors: Makoto AKAI, Tomohiro ONO
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Patent number: 12006406Abstract: Pellets of an acrylic block copolymer are provided which are imparted with sufficient antiblocking properties without deterioration in the outstanding performance of the acrylic block copolymer such as transparency. A method for producing pellets (D) including an acrylic block copolymer (A) includes bringing raw pellets of an acrylic block copolymer (A) into contact with an aqueous dispersion (C) containing acrylic resin particles (B) and no surfactants, the acrylic block copolymer (A) including at least one polymer block (a1) including acrylic acid alkyl ester units and at least one polymer block (a2) including methacrylic acid alkyl ester units, and removing water attached to the pellets.Type: GrantFiled: May 28, 2019Date of Patent: June 11, 2024Assignee: KURARAY CO., LTD.Inventors: Makoto Akai, Tomohiro Ono, Moe Kawahara
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Publication number: 20240182700Abstract: A resin composition containing an acrylic block copolymer (I) and an acrylic block copolymer (II) at a specific proportion thereof, wherein the acrylic block copolymer (I) has at least one polymer block (A1) containing a methacrylic ester unit and at least one polymer block (B1) containing a specific acrylic ester unit and satisfies a specific requirement, and the acrylic block copolymer (II) has at least one polymer block (A2) containing a specific methacrylic ester unit and at least one polymer block (B2) containing a specific acrylic ester unit, and the acrylic block copolymer (II) satisfies a specific requirement.Type: ApplicationFiled: March 18, 2022Publication date: June 6, 2024Applicant: KURARAY CO., LTD.Inventors: Nao OKUMURA, Moe KAWAHARA, Tomohiro ONO
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Publication number: 20240174785Abstract: A method of producing a polymer including a polymerization step of obtaining a polymer by controlled radical polymerization of a monomer (Y) in the presence of an organic compound (A) represented by formula (I) and its constituents and a radical generator (B), where a molar ratio (B/A) of (B) to (A) is from 0.5 to 20. The production method allows synthesis of a highly safe polymer with a high molecular weight while precisely controlling the molecular sequence and the end structure. In addition, the production method is low in toxicity, environmentally friendly, and operated at low costs.Type: ApplicationFiled: March 10, 2022Publication date: May 30, 2024Applicant: KURARAY CO., LTD.Inventors: Takumi TAKAYAMA, Hinako TSUCHIYA, Kazuhiko MAEKAWA
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Publication number: 20240166860Abstract: The present invention relates to a A resin composition containing: a block copolymer (A) having a polymer block (a1) containing a structural unit derived from an aromatic vinyl compound and a polymer block (a2) containing a structural unit derived from farnesene; a block copolymer (B) having a polymer block (b1) containing a structural unit derived from an aromatic vinyl compound and a polymer block (b2) containing 30 mol % or more of a structural unit derived from isoprene; a plasticizer (C); and a biomass-derived polyolefin-based resin (D), in which the resin composition has a biobased content of 37% by mass or more, and a molded body obtained by using the resin composition.Type: ApplicationFiled: January 28, 2022Publication date: May 23, 2024Applicant: KURARAY CO., LTD.Inventors: Daisuke KONISHI, Hiromitsu SASAKI, Takahiro SEKIGUCHI, Yuta TOMISHIMA, Takumi HASEGAWA
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Publication number: 20240158585Abstract: A compounding material for rubber kneading including: a sealing pouch (A) having an outer layer with a thickness of 30 to 100 ?m that is made of a polymer (a) with a melting point of 60 to 140° C., and a liquid diene-based rubber (B) sealed inside the sealing pouch (A). Also a sealed package including: a sealing container with low water vapor permeability, and the compounding material for rubber kneading sealed inside the sealing container.Type: ApplicationFiled: March 15, 2022Publication date: May 16, 2024Applicant: KURARAY CO., LTD.Inventors: Hiroshi KANBARA, Satomi OHTA
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Publication number: 20240162466Abstract: One aspect of the present invention is a carbon dioxide adsorption battery including: a negative electrode; a positive electrode; a separator disposed between the negative electrode and the positive electrode; and electrolyte layers respectively disposed between the negative electrode and the separator and between the positive electrode and the separator, wherein the negative electrode is a gas-permeable electrode, each of the electrolyte layers includes an electrolytic solution capable of dissolving carbon dioxide, and a redox compound having an N-oxy radical group within a molecule, and the separator suppresses permeation of the redox compound but is permeable to the electrolytic solution.Type: ApplicationFiled: February 15, 2022Publication date: May 16, 2024Applicant: KURARAY CO., LTD.Inventor: Hideharu IWASAKI
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Patent number: 11980259Abstract: A molded hook surface fastener having a base plate and hook engaging elements projecting from a surface of the base plate, both the base plate and the hook engaging elements being formed of a resin mixture containing polybutylene succinate (A), a modified starch having an amylose content of 45% by weight or more (B), and polyvinyl alcohol (C). The resin mixture is further characterized by having both a continuous phase and a dispersed phase, with the polybutylene succinate (A) present in the continuous phase, and the modified starch (B) and polyvinyl alcohol (C) present in the dispersed phase.Type: GrantFiled: March 26, 2020Date of Patent: May 14, 2024Assignees: Kuraray Fastening Co., Ltd., KURARAY CO., LTD.Inventors: Nobuhiro Koga, Satoru Ono, Junya Ide, Yoshikatsu Fujisawa
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Publication number: 20240150944Abstract: Provided are: a fiber structure including two types of heat-crosslinkable thermoplastic resins; and a crosslinked molded body obtained by heat-crosslinking the thermoplastic resins with each other. The fiber structure includes at least a thermoplastic resin A and a thermoplastic resin B both heat-crosslinkable with each other. The thermoplastic resin A is an amorphous epoxy-type resin, and at least one of the thermoplastic resins A and B has a fiber shape.Type: ApplicationFiled: December 18, 2023Publication date: May 9, 2024Applicant: KURARAY CO., LTD.Inventors: Yuki INOUE, Takeshi Tsudaka, Satoshi Katsuya, Shohei Tsunofuri
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Patent number: 11976190Abstract: The present invention relates to a block copolymer that contains a polymer block A containing a farnesene-derived monomer unit (a1) and a random copolymer block B containing a C12 or lower conjugated diene-derived monomer unit (b1) and an aromatic vinyl compound-derived monomer unit (b2), the block copolymer having a ratio by mass of the polymer block A to the random copolymer block B (A/B) of 30/70 to 0.5/99.5, a content of the aromatic vinyl compound-derived monomer unit (b2) in the random copolymer block B of 1 to 50% by mass, and a weight average molecular weight (Mw) of 100,000 to 5,000,000.Type: GrantFiled: March 28, 2019Date of Patent: May 7, 2024Assignees: KURARAY CO., LTD., AMYRIS, INC.Inventor: Daisuke Koda
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Patent number: 11970612Abstract: Provided are a polyamide composition containing a polyamide (A) having a melting point of 280° C. or higher, a flame retardant (B) and an aromatic vinyl copolymer (C), wherein the aromatic vinyl copolymer (C) contains a structural unit derived from an aromatic vinyl and a structural unit derived from an ?,?-unsaturated dicarboxylic anhydride, the glass transition temperature of the aromatic vinyl copolymer (C) is 140° C. or higher, and the content of the aromatic vinyl copolymer (C) is 0.3 to 2.0% by mass relative to the total content of the polyamide (A), the flame retardant (B) and the aromatic vinyl copolymer (C); and a molded article of the polyamide composition.Type: GrantFiled: August 21, 2019Date of Patent: April 30, 2024Assignee: KURARAY CO., LTD.Inventors: Shimon Kanai, Naoto Sugai, Takaharu Shigematsu
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Patent number: 11970561Abstract: The invention provides a modified liquid diene polymer that allows a rubber composition to give a crosslinked product which contains a filler in a dispersed state ideal for attaining enhanced properties and which also exhibits excellent properties such as wet grip and abrasion resistance. The invention also provides a rubber composition including the modified liquid diene polymer, a crosslinked product thereof, and a tire which includes a portion including the composition or the crosslinked product. The modified liquid diene polymer is a product of modification, with a specific silane compound, of a liquid diene block copolymer including a polymer block (b?1) or (b?1) containing butadiene units and a polymer block (b?2) or (b?2). The modified liquid diene polymer has a functional group derived from the silane compound, and satisfies specific conditions.Type: GrantFiled: March 4, 2019Date of Patent: April 30, 2024Assignee: KURARAY CO., LTD.Inventors: Satomi Ohta, Hiroshi Kanbara, Daisuke Koda
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Patent number: 11969924Abstract: The present invention relates to a waterproof component that is an insert molded body formed from a thermoplastic resin composition and a metal component, wherein the thermoplastic resin composition contains a thermoplastic resin (A) and an inorganic fibrous reinforcement (B); the content of the inorganic fibrous reinforcement (B) is 8 to 130 parts by mass based on 100 parts by mass of the thermoplastic resin (A); and the inorganic fibrous reinforcement (B) has an average fiber diameter of 10 ?m or less and an average fiber length of 300 ?m or less.Type: GrantFiled: October 26, 2018Date of Patent: April 30, 2024Assignee: KURARAY CO., LTD.Inventors: Naoto Sugai, Yuki Ito, Takaharu Shigematsu
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Publication number: 20240133782Abstract: A non-transitory computer readable storage medium with a destruction prediction program causing a computer to determine destruction prediction of a resin molding, and to function as a first calculation portion that calculates a maximum value of an equivalent strain that occurs in a cutout bottom and an inclination of an equivalent strain by applying, to a 3D test piece model of a test piece, a load at breaking the test piece, a threshold set portion that sets a threshold E of destruction progress based on the maximum value and the inclination, a second calculation portion that calculates a maximum value of an occurring equivalent strain and an inclination of an equivalent strain by applying a load to the 3D target model, and a destruction determination portion that determines whether or not destruction occurs based on the maximum value and the inclination, and the threshold.Type: ApplicationFiled: February 14, 2022Publication date: April 25, 2024Applicant: KURARAY CO., LTD.Inventor: Kazuma YANAGISAWA
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Publication number: 20240136524Abstract: A sodium ion secondary battery that has high discharge capacity, excellent cycling characteristics, and excellent storage characteristics is provided. The present disclosure includes a carbonaceous material for a sodium ion secondary battery negative electrode. The carbon source of the carbonaceous material is a plant, and the carbonaceous material has a BET specific surface area of 100 m2/g or less.Type: ApplicationFiled: December 26, 2023Publication date: April 25, 2024Applicant: KURARAY CO., LTD.Inventors: Shota KOBAYASHI, Tetsuhiro KOBAYASHI, Yasuhiro TADA
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Publication number: 20240132632Abstract: A method for producing a hydrogenated polymer composition including a hydrogenated conjugated diene modified polymer that has a boron-containing functional group, the method including: (1) anionically polymerizing a monomer including a conjugated diene in the presence of a reactive metal or reactive metal compound capable of causing anionic polymerization to produce a reactive terminal polymer (Z); (2) reacting the reactive terminal polymer (Z) obtained in (1) with a boric acid compound that has at least two partial structures represented by B—O—R (I), and in which at least one R bonded to an oxygen atom in the partial structure (I) has a Taft's steric parameter Es value of ?0.30 or less to obtain an unhydrogenated conjugated diene modified polymer having a boron-containing functional group; and (3) hydrogenating at least some of carbon-carbon double bonds contained in conjugated diene units included in the unhydrogenated conjugated diene modified polymer obtained in (2).Type: ApplicationFiled: February 8, 2022Publication date: April 25, 2024Applicant: KURARAY CO., LTD.Inventors: Tadahito FUKUHARA, Atsushi INATOMI, Takuro KARAKIDA, Satomi OHTA, Kenta TOSHINARI, Akio FUJITA
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Patent number: 11959580Abstract: The present disclosure provides a fuel pipe having a double tube with an inner tube and an outer tube disposed on the outside of the inner tube.Type: GrantFiled: December 13, 2019Date of Patent: April 16, 2024Assignee: KURARAY CO., LTD.Inventors: Makoto Suzuki, Wout Luyten, Hiroyuki Shimo
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Patent number: 11958954Abstract: There is provided a multilayer structure comprising a layer (A) containing an ethylene-vinyl alcohol copolymer having an ethylene unit content of 1 mol % or more and less than 20 mol %, a viscosity-average polymerization degree of 200 to 5000, and a saponification degree of 80 to 99.7 mol %, wherein a block character of ethylene units is 0.90 to 0.99; and a layer (B) containing at least one resin selected from the group consisting of a polyolefin resin, a polyester resin and a polyamide resin. Such a multilayer structure has excellent oxygen-gas barrier performance. In addition, an aqueous solution containing the ethylene-vinyl alcohol copolymer exhibits excellent viscosity stability even after long-term storage. Therefore, even after a long period of time from preparation of the aqueous solution, it can be uniformly applied to a substrate and thus, a multilayer structure having excellent oxygen-gas barrier performance can be provided.Type: GrantFiled: July 17, 2019Date of Patent: April 16, 2024Assignee: KURARAY CO., LTD.Inventors: Tadahito Fukuhara, Tatsuya Tanida
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Publication number: 20240117178Abstract: A resin composition containing: a block copolymer (I) having a polymer block (a1) containing a structural unit derived from an aromatic vinyl compound and a polymer block (a2) containing a structural unit derived from a conjugated diene compound; a plasticizer (II); and a biomass-derived polyolefin-based resin (III); in which the plasticizer (II) contains a plasticizer (II-1) containing a biomass-derived raw material; and in which the resin composition has a biobased content of 45% by mass or more, and a molded body obtained by using the resin composition.Type: ApplicationFiled: January 28, 2022Publication date: April 11, 2024Applicant: KURARAY CO., LTD.Inventors: Daisuke KONISHI, Hiromitsu SASAKI, Takahiro SEKIGUCHI, Yuta TOMISHIMA, Takumi HASEGAWA
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Publication number: 20240116281Abstract: Provided are a multilayer structure and the like being superior in adhesiveness of an interlayer under high humidity and separability of a barrier layer in water, and even in a case in which the barrier layer is exposed to water in a separating and collecting step, being superior in viscosity stability after separating and collecting a resin that constitutes the barrier layer. The multilayer structure of the present invention is a multilayer structure including a barrier layer (A), a water-soluble layer (B), and an adhesive layer (C), in which: the adhesive layer (C) is laminated via the water-soluble layer (B) on one or both faces of the barrier layer (A); the barrier layer (A) contains a polyamide or an ethylene-vinyl alcohol copolymer (a1) as a principal component; and the water-soluble layer (B) contains an alkali metal ion (b1) at a content of 100 ppm or more and 2,000 ppm or less.Type: ApplicationFiled: November 24, 2021Publication date: April 11, 2024Applicant: Kuraray Co., Ltd.Inventors: Satoshi Ishiuchi, Makoto Suzuki