Patents Assigned to Arakawa Chemical Industries, Ltd.
  • Patent number: 11962010
    Abstract: Provided are a binder aqueous solution for a lithium-ion battery electrode, a slurry for a lithium-ion battery electrode, a lithium-ion battery electrode, and a lithium-ion battery. The binder aqueous solution for a lithium-ion battery electrode contains a water-soluble polymer (A). The water-soluble polymer (A) is a polymer of a monomer group containing, with respect to 100 mol % of the monomer group, 5 mol % to 80 mol % of a hydroxyl group-containing vinyl ether (a). In one embodiment, the monomer group contains 20 mol % to 95 mol % of a (meth)acrylamide group-containing compound (b).
    Type: Grant
    Filed: September 2, 2020
    Date of Patent: April 16, 2024
    Assignee: ARAKAWA CHEMICAL INDUSTRIES, LTD.
    Inventors: Katsuya Okubo, Hideki Goda, Naoki Sasagawa, Satoru Aoyama
  • Publication number: 20240101818
    Abstract: There is provided an aqueous heat-sealable resin composition which enables a laminate to have excellent heat sealing strength and blocking resistance. The disclosure relates to an aqueous heat-sealable resin composition which contains a urethane resin (A) which is a product of reaction components including a polyether polyol (a1), a polyisocyanate (a2) and a chain extender (a3) or the urethane resin (A) and a wax (B), and a laminate having a coating of the composition on at least one surface of a substrate.
    Type: Application
    Filed: September 21, 2023
    Publication date: March 28, 2024
    Applicant: ARAKAWA CHEMICAL INDUSTRIES, LTD.
    Inventors: Keisuke Okada, Mayu Matsumoto, Teruaki Sato
  • Patent number: 11795620
    Abstract: A method for manufacturing a powdery paper-strengthening agent including a branched (meth)acrylamide-based polymer (A) which includes a step of obtaining (A) component by polymerizing (meth)acrylamide (a1), anionic vinyl monomer (a2), cationic vinyl monomer (a3) and crosslinkable vinyl monomer (a4) in a solvent in a presence of a polymerization initiator, a step of dropping or putting the above (A) component into an organic solvent to form a precipitate, and a step of drying and pulverizing (A) component obtained as the precipitate.
    Type: Grant
    Filed: October 28, 2022
    Date of Patent: October 24, 2023
    Assignee: ARAKAWA CHEMICAL INDUSTRIES, LTD.
    Inventors: Ryusuke Kambara, Daisuke Fujioka, Shogo Nishiura
  • Patent number: 11769866
    Abstract: Provided are a binder aqueous solution for a lithium-ion battery, a slurry for a lithium-ion battery negative electrode, a negative electrode for a lithium-ion battery, and a lithium-ion battery. The binder aqueous solution for a lithium-ion battery contains a water-soluble poly(meth)acrylamide (A). The water-soluble poly(meth)acrylamide (A) is a polymer of a monomer group containing, with respect to 100 mol % of the monomer group, 30 mol % to 95 mol % of a (meth)acrylamide group-containing compound (a), and 5 mol % to 40 mol % of an alkoxyalkyl (meth)acrylate (b) represented by the following general formula (1), CH2?C(R1)—CO—O—R2—O—R3??(1) (in which R1 is a hydrogen atom or a methyl group, R2 is an alkylene group having 1 to 4 carbon atoms, R3 is an alkyl group having 1 to 4 carbon atoms, and a total number of carbon atoms of the groups R1, R2 and R3 is 5 or less.
    Type: Grant
    Filed: September 15, 2020
    Date of Patent: September 26, 2023
    Assignee: ARAKAWA CHEMICAL INDUSTRIES, LTD.
    Inventors: Katsuhiko Ikeyatsu, Shinji Ozaki, Hideki Goda
  • Publication number: 20230203756
    Abstract: A papermaking agent exhibiting an excellent freeness and paper strength effect with little increase in viscosity after long-term storage. A papermaking agent including a (meth)acrylamide polymer containing two or more starches (a1) selected from the group consisting of unmodified starch, oxidized starch, esterified starch, etherified starch, amidated starch, cationic starch, amphoteric starch and crosslinked starch, a (meth)acrylamide (a2), a polymerizable monomer having an amino group (a3), a polymerizable monomer having a carboxy group (a4) and a polymerizable monomer having a sulfonate group (a5) as essential constituent components.
    Type: Application
    Filed: September 16, 2022
    Publication date: June 29, 2023
    Applicant: ARAKAWA CHEMICAL INDUSTRIES, LTD.
    Inventors: Ryusuke KAMBARA, Hiroyuki IOKA, Shuichi TAKAKI
  • Patent number: 11670776
    Abstract: Provided are a binder aqueous solution for a lithium-ion battery electrode, a slurry for a lithium-ion battery negative electrode, a negative electrode for a lithium-ion battery, and a lithium-ion battery. The binder aqueous solution for a lithium-ion battery electrode contains an acidic group-containing water-soluble polymer (A) and an amino group-containing water-soluble polymer (B). The acidic group-containing water-soluble polymer (A) is a polymer of a monomer group containing, with respect to 100 mol % of the monomer group, 30 mol % to 90 mol % of a (meth)acrylamide group-containing compound (a), 3 mol % to 20 mol % of an unsaturated organic acid (b), and 5 mol % to 40 mol % of an alkali metal or alkaline earth metal salt (c) of the unsaturated organic acid. A 1% by mass aqueous solution of the amino group-containing water-soluble polymer (B) has a pH of 9 or higher.
    Type: Grant
    Filed: February 4, 2021
    Date of Patent: June 6, 2023
    Assignee: ARAKAWA CHEMICAL INDUSTRIES, LTD.
    Inventors: Katsuhiko Ikeyatsu, Hideki Goda
  • Patent number: 11658302
    Abstract: To provide a conductive carbon material dispersing agent for a lithium ion battery, a slurry for a lithium ion battery electrode, an electrode for a lithium ion battery, and a lithium ion battery The disclosure provides a conductive carbon material dispersing agent for a lithium ion battery including a water-soluble poly(meth)acrylamide (A-1) which contains 2 to 60 mol % of structural units derived from a (meth)acrylamide group-containing compound (a) and 10 to 70 mol % of structural units derived from an unsaturated sulfonic acid or salts thereof (b), and which has a weight average molecular weight of 10,000 to 300,000.
    Type: Grant
    Filed: November 12, 2020
    Date of Patent: May 23, 2023
    Assignee: ARAKAWA CHEMICAL INDUSTRIES, LTD.
    Inventors: Shinji Ozaki, Katsuhiko Ikeyatsu, Katsuya Okubo, Satoru Aoyama, Naoki Sasagawa, Hideki Goda
  • Patent number: 11646421
    Abstract: Provided are a thermally crosslinkable binder aqueous solution for a lithium-ion battery, a thermally crosslinkable slurry for a lithium-ion battery negative electrode, a negative electrode for a lithium-ion battery, and a lithium-ion battery. The thermally crosslinkable binder aqueous solution for a lithium-ion battery contains a water-soluble poly(meth)acrylamide (A) and a divalent or higher valent metal ion. The water-soluble poly(meth)acrylamide (A) contains 2 mol % to 60 mol % of a constituent unit derived from a (meth)acrylamide group-containing compound (a), and 10 mol % to 50 mol % of a constituent unit derived from one or more unsaturated acids selected from the group consisting of unsaturated carboxylic acids and unsaturated sulfonic acids or an inorganic salt thereof (b). The divalent or higher valent metal ion is contained in an amount of 0.5 mol % to 30 mol % with respect to 100 mol % of an acid group contained in the component (b).
    Type: Grant
    Filed: August 20, 2020
    Date of Patent: May 9, 2023
    Assignee: ARAKAWA CHEMICAL INDUSTRIES, LTD.
    Inventors: Shinji Ozaki, Hideki Goda, Naoki Sasagawa, Satoru Aoyama, Katsuya Okubo, Katsuhiko Ikeyatsu
  • Patent number: 11637288
    Abstract: Provided are a thermally crosslinkable binder aqueous solution for a lithium-ion battery, a thermally crosslinkable slurry for a lithium-ion battery negative electrode, a negative electrode for a lithium-ion battery, a lithium-ion battery negative electrode material, as well as a lithium-ion battery and a method for producing the same.
    Type: Grant
    Filed: June 16, 2020
    Date of Patent: April 25, 2023
    Assignee: ARAKAWA CHEMICAL INDUSTRIES, LTD.
    Inventors: Hideki Goda, Naoki Sasagawa, Shinji Ozaki, Satoru Aoyama, Katsuya Okubo, Katsuhiko Ikeyatsu
  • Publication number: 20230110098
    Abstract: A binder aqueous solution for power storage device, a slurry for power storage device, an electrode for power storage device, a separator for power storage device, a separator/electrode laminate for power storage device and a power storage device are provided. The present disclosure provides a binder aqueous solution for power storage device, in which the binder aqueous solution for power storage device contains a water-soluble polymer, the water-soluble polymer contains more than 99 mass% and less than 99.9 mass% of a structural unit derived from a (meth)acrylamide group-containing compound and more than 0.1 mass% and less than 1 mass% of a structural unit derived from an unsaturated hydrocarbon sulfonic acid and/or a salt thereof, and a weight average molecular weight of the water-soluble polymer is less than 300,000.
    Type: Application
    Filed: September 19, 2022
    Publication date: April 13, 2023
    Applicant: ARAKAWA CHEMICAL INDUSTRIES, LTD.
    Inventors: Naoki SASAGAWA, Shinji OZAKI, Satoru AOYAMA, Katsuya OKUBO
  • Publication number: 20230101181
    Abstract: A curable photosensitive resin composition which can be cured at a relatively low temperature, has excellent developability and adhesion to a support, and a cured product that realizes low dielectric constant properties. A curable photosensitive resin composition containing a polyimide resin (A) which is a reaction product of monomer groups containing an aromatic tetracarboxylic anhydride (a1) and a diamine (a2) containing a dimer diamine, maleimides (B), and a polyfunctional polymerizable compound (C) having two or more ethylenic double bonds other than the component (A) and the component (B), a cured product, a photosensitive element, a resist pattern, a method of producing a resist pattern, a semiconductor device and an electronic device.
    Type: Application
    Filed: September 28, 2022
    Publication date: March 30, 2023
    Applicant: ARAKAWA CHEMICAL INDUSTRIES, LTD.
    Inventors: Takashi Yamaguchi, Taiyou Nakamura, Atsushi Shiotani, Keisuke Sugimoto, Madoka Yamashita, Takashi Tasaki
  • Publication number: 20230085796
    Abstract: A relatively inexpensive papermaking agent having a high concentration and a high molecular weight that exhibits an excellent freeness and paper strength effect obtained using starches which are biomass materials. A papermaking agent which is a (meth)acrylamide polymer containing starches (a1), a (meth)acrylamide (a2), a polymerizable monomer having an amino group (a3), a polymerizable monomer having a carboxy group (a4) and a polymerizable monomer having a sulfonate group (a5) as essential constituent components, wherein the ratio between the amount of the component (a1) used in terms of non-volatile content weight and a total amount of the components (a2) to (a5) used is [(a1)/{(a2)+(a3)+(a4)+(a5)}]=5/95 to 45/55, and wherein the (meth)acrylamide polymer has a non-volatile content concentration of 22 to 35 weight %, and a weight average molecular weight of 1,500,000 to 7,000,000.
    Type: Application
    Filed: September 15, 2022
    Publication date: March 23, 2023
    Applicant: ARAKAWA CHEMICAL INDUSTRIES, LTD.
    Inventors: Ryusuke Kambara, Hiroyuki Ioka, Shuichi Takaki
  • Publication number: 20230084251
    Abstract: The present disclosure provides a heat sealing aqueous resin composition containing: a rosin resin (A); a biodegradable resin (B) including a resin having a structure of General Formula (1) and/or a resin (b1) having a structure of General Formula (2); and a polyvinyl alcohol (C) in which an average saponification degree is 75 mol % or more and 85 mol % or less, in which a content of the component (b1) is more than 50% by mass when a total content of the component (A) and the component (B) is 100% by mass.
    Type: Application
    Filed: August 24, 2022
    Publication date: March 16, 2023
    Applicant: ARAKAWA CHEMICAL INDUSTRIES, LTD.
    Inventors: Keisuke Okada, Kaito Kuroda, MAYU MATSUMOTO, Teruaki Sato
  • Publication number: 20230077630
    Abstract: A water-based composition for barrier containing a urethane resin (A) which is comprising a polyol (a1), a polyisocyanate (a2) and a chain extender (a3) as essential reaction components, and at least one wax (B) selected from the group consisting of a paraffin, a carnauba and an alkyl ketene dimer, and further a content ratio between the component (A) and the component (B) in terms of the non-volatile content weight is (A)/(B)=25/75 to 95/5.
    Type: Application
    Filed: August 23, 2022
    Publication date: March 16, 2023
    Applicant: ARAKAWA CHEMICAL INDUSTRIES, LTD.
    Inventors: Keisuke Okada, Kaito Kuroda, Teruaki Sato
  • Publication number: 20230065141
    Abstract: A method for manufacturing a powdery paper-strengthening agent including a branched (meth)acrylamide-based polymer (A) which includes a step of obtaining (A) component by polymerizing (meth)acrylamide (a1), anionic vinyl monomer (a2), cationic vinyl monomer (a3) and crosslinkable vinyl monomer (a4) in a solvent in a presence of a polymerization initiator, a step of dropping or putting the above (A) component into an organic solvent to form a precipitate, and a step of drying and pulverizing (A) component obtained as the precipitate.
    Type: Application
    Filed: October 28, 2022
    Publication date: March 2, 2023
    Applicant: ARAKAWA CHEMICAL INDUSTRIES, LTD.
    Inventors: Ryusuke KAMBARA, Daisuke FUJIOKA, Shogo NISHIURA
  • Publication number: 20220411597
    Abstract: A composition for fiber-reinforced resin that provides a fiber-reinforced resin with sufficient mechanical strength. The composition for fiber-reinforced resin contains at least one resin (A) selected from the group consisting of rosin resins, petroleum resins, terpene resins, and hydrides of cyclic ketone-aldehyde resins, and the resin (A) has a softening point of 80° C. to 180° C.
    Type: Application
    Filed: November 19, 2020
    Publication date: December 29, 2022
    Applicant: ARAKAWA CHEMICAL INDUSTRIES, LTD.
    Inventors: Hisako OGAWA, Yukihiro NISHIOKA, Hiroki OCHIAI
  • Publication number: 20220396712
    Abstract: A water-based oil resistant agent containing at least one resin (A) selected from the group consisting of the following (A1) and (A2), and a paraffin wax (B): (A1) an olefin resin which is a polymer containing monoolefins having a total number of carbon atoms of 4 or more (a1-1) and an ?,?-unsaturated carboxylic acid (a1-2) as essential reaction components; and (A2) a urethane resin which is a polymer containing a polyol (a2-1), a polyisocyanate (a2-2) and a chain extender (a2-3) as essential reaction components.
    Type: Application
    Filed: June 7, 2022
    Publication date: December 15, 2022
    Applicant: ARAKAWA CHEMICAL INDUSTRIES, LTD.
    Inventors: Keisuke Okada, Takashi Minabe, Kosuke Tsuji
  • Publication number: 20220169767
    Abstract: A powdery paper-strengthening agent, comprising a branched (meth)acrylamide-based polymer (A) having a weight-average molecular weight of 1,000,000 to 8,000,000 and a molecular weight distribution of 1.4 to 3.0, wherein the branched (meth)acrylamide-based polymer (A) comprises, as constituent monomers, a (meth)acrylamide (a1), a crosslinkable unsaturated monomer (a2), and at least one of a cationic unsaturated monomer (a3) and an anionic unsaturated monomer (a4), and wherein a content of unreacted (a1) component is 1,000 ppm or less.
    Type: Application
    Filed: February 20, 2020
    Publication date: June 2, 2022
    Applicant: Arakawa Chemical Industries, Ltd.
    Inventors: Shogo NISHIURA, Daisuke FUJIOKA, Keisuke OKADA
  • Patent number: 11338545
    Abstract: A laminate comprising a plastic substrate (A); a hardened organic polymer layer (B) provided on a surface of the plastic substrate (A) and having a storage elastic modulus of from 0.01 to 5 GPa and tan ? of from 0.1 to 2.0 at 25° C. which are measured at a temperature elevating rate of 2° C./min by a dynamic viscoelasticity test stipulated in JIS K 7244; an organic/inorganic composite layer (C) provided on a surface of the hardened organic polymer layer (B) and containing covalently bound organic polymer and metal oxide nanoparticles; and an inorganic layer (D) provided on a surface of the organic/inorganic composite layer (C) and comprising secondary particles of ceramic or metal.
    Type: Grant
    Filed: April 17, 2018
    Date of Patent: May 24, 2022
    Assignees: National Institute of Advanced Industrial Science and Technology, Arakawa Chemical Industries, Ltd.
    Inventors: Hiroaki Noda, Jun Akedo, Hideki Goda, Takeshi Fukuda, Haruhisa Togashi
  • Publication number: 20220056306
    Abstract: There are provided a surface protection coating agent, a cured product, and a laminate and a method of producing the same. The disclosure provides a surface protection coating agent including a polymer (A) including a structural unit 1 derived from long chain alkyl group-containing (meth)acrylic acid ester and a structural unit 2 derived from a hydroxy group-containing (meth)acrylic monomer and a polyisocyanate (B).
    Type: Application
    Filed: August 10, 2021
    Publication date: February 24, 2022
    Applicant: ARAKAWA CHEMICAL INDUSTRIES, LTD.
    Inventors: Yuki HASHIMOTO, Shotaro TOGAMI, Yoshiki ITO, Akihiro YAMAZAKI