Patents by Inventor Kazutoshi Hayakawa
Kazutoshi Hayakawa 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).
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Publication number: 20230331939Abstract: The present invention provides amphiphilic polymer particles which are formed from a naturally derived starting material and exhibit hydrophobicity, while maintaining an adequate water absorption. An amphiphilic alginic acid particle group which is obtained by subjecting a polyvalent metal salt of alginic acid to a hydrophobization treatment with use of a hydrophobizing agent, wherein: some metal ions in the polyvalent metal salt of alginic acid are hydrophobized through a chemical bond with the hydrophobizing agent; the contact angle at 30 seconds after dropping a water droplet on the particle group is from 300 to 150°; and the water absorption per 100 g of the particles is not less than the oil absorption per 100 g of the particles.Type: ApplicationFiled: May 7, 2021Publication date: October 19, 2023Applicant: NISSHINBO HOLDINGS INC.Inventors: Toshifumi Hashiba, Kazutoshi Hayakawa, Erina Matsuzaka
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Publication number: 20230287210Abstract: Provided is a biodegradation accelerator for accelerating the biodegradation of resins, etc. in the ocean. This marine-biodegradation accelerator comprises a compound including anions of one or more kinds including an anion having six or more carbon atoms and three or more oxygen atoms and a metal cation having a valence of two or higher, the anions and the cation being bonded by ionic bonding. A group of particles of the compound forms a contact angle of 30° or larger 30 seconds after a waterdrop is dropped thereonto.Type: ApplicationFiled: May 7, 2021Publication date: September 14, 2023Applicant: Nisshinbo Holdings Inc.Inventors: Kazutoshi Hayakawa, Toshifumi Hashiba, Erina Matsuzaka
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Publication number: 20220127435Abstract: The present invention provides a hydrophobic alginic acid particle group which is obtained by subjecting a polyvalent metal alginate to a hydrophobization treatment, and which is configured such that the water absorption per 100 g of the particles is lower than the oil absorption per 100 g of the particles.Type: ApplicationFiled: January 30, 2020Publication date: April 28, 2022Applicant: Nisshinbo Holdings Inc.Inventors: Kazutoshi Hayakawa, Toshifumi Hashiba, Erina Matsuzaka
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Patent number: 11225541Abstract: This production method is for disc-shaped polymer particles having an average aspect ratio of 1-1.3. The method comprises conducting, in a solvent, solution polymerization of monomers including a hydrophobic unsaturated monomer which is liquid at 25° C., in the presence of a polymerization initiator, a surfactant, and/or a polymer stabilizer, wherein a solvent mixture containing water, a hydrophilic organic solvent, and a hydrophobic organic solvent is used as the solvent, and, as the polymerization initiator, one or more polymerization initiators soluble in at least one of water, the hydrophilic organic solvent, and the hydrophobic organic solvent are used as a combination that is soluble in all of water, the hydrophilic organic solvent, and the hydrophobic organic solvent, such that the hydrophobic unsaturated monomer, water, the hydrophilic organic solvent, and the hydrophobic organic solvent are mixed at a predetermined ratio.Type: GrantFiled: April 15, 2019Date of Patent: January 18, 2022Assignee: NISSHINBO HOLDINGS INC.Inventors: Kazutoshi Hayakawa, Toshifumi Hashiba
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Publication number: 20210246250Abstract: This production method is for disc-shaped polymer particles having an average aspect ratio of 1-1.3. The method comprises conducting, in a solvent, solution polymerization of monomers including a hydrophobic unsaturated monomer which is liquid at 25° C., in the presence of a polymerization initiator, a surfactant, and/or a polymer stabilizer, wherein a solvent mixture containing water, a hydrophilic organic solvent, and a hydrophobic organic solvent is used as the solvent, and, as the polymerization initiator, one or more polymerization initiators soluble in at least one of water, the hydrophilic organic solvent, and the hydrophobic organic solvent are used as a combination that is soluble in all of water, the hydrophilic organic solvent, and the hydrophobic organic solvent, such that the hydrophobic unsaturated monomer, water, the hydrophilic organic solvent, and the hydrophobic organic solvent are mixed at a predetermined ratio.Type: ApplicationFiled: April 15, 2019Publication date: August 12, 2021Applicant: Nisshinbo Holdings Inc.Inventors: Kazutoshi Hayakawa, Toshifumi Hashiba
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Patent number: 10729623Abstract: A method for producing elliptical, needle-shaped, or rod-shaped polymer particles satisfying (1)-(3) below includes a step in which a synthesis solution including water, a mixed solvent of a hydrophilic organic solvent and a hydrophobic organic solvent, a polymeric stabilizer, a polymerization initiator, and an unsaturated monomer is heated, and, at least after the heating has started, the pH of the synthesis solution is adjusted to 5-9 inclusive to perform solution polymerization: (1) the average (LAV) length (L) in a two-dimensional projection diagram obtained by irradiating the particles with light from a direction orthogonal to the longitudinal direction is 0.1-80 ?m; (2) the average (DAV) breadth (D) in the two-dimensional projection diagram obtained by irradiating the particles with light from the direction orthogonal to the longitudinal direction is 0.05-40 ?m; and (3) the average (PAV) aspect ratio (L/D) calculated from the length (L) and the breadth (D) is 1.5-30.Type: GrantFiled: May 2, 2016Date of Patent: August 4, 2020Assignee: NISSHINBO HOLDINGS, INC.Inventors: Kazutoshi Hayakawa, Toshifumi Hashiba, Erina Matsuzaka, Goki Yamada
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Patent number: 10584193Abstract: These flat elliptical polymer particles have a front view, a planar view, and a side view in a projection diagram based on third-angle projection which are all elliptical. The flat elliptical polymer particles satisfy (1)-(4): (1) the average length (LAV) of flat portions satisfies 0.13?(LAV)?500 ?m; (2) the average breadth (DAV) of the flat portions satisfies 0.1?(DAV)?250 ?m; (3) the average (P1AV) aspect ratio (L/D) calculated from the length (L) and the breadth (D) satisfies 1.3<P1AV?50; and (4) the average (P2AV) aspect ratio (D/T) calculated from the breadth (D) and the thickness (T) of the side surface satisfies 1.2<P2AV?100.Type: GrantFiled: May 2, 2016Date of Patent: March 10, 2020Assignee: NISSHINBO HOLDINGS INC.Inventors: Kazutoshi Hayakawa, Toshifumi Hashiba, Erina Matsuzaka
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Publication number: 20200054535Abstract: Provided is a skin cosmetic that includes: (A) 0.1-40 mass % of polymer particles that include prolate-spheroidal polymer particles A that haw no flat surfaces that (1), in a two-dimensional projection obtained by shining light from a direction that is orthogonal to a longitudinal-axis direction, have an average (L1AV) major axis (L1) of 3-60 ?m, that (2), in the two-dimensional projection obtained by shining light from the direction that is orthogonal to the longitudinal-axis direction, have an average (D1AV) minor axis (D1) of 0.5-30 ?m, and that (3) have an average (P1AV) aspect ratio (L1/D1), as calculated from the major axes (L1) and the minor axes (D1), of 1.5-30; and 60-99.9 mass % of other components that include (B) inorganic particles and (C) an oily component.Type: ApplicationFiled: February 21, 2018Publication date: February 20, 2020Applicant: Nisshinbo Holdings Inc.Inventors: Kazutoshi Hayakawa, Toshifumi Hashiba
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Publication number: 20190254938Abstract: Provided are skin cosmetics including 0.1-50% by mass of polymer particles including flat, oval, spherical polymer particles A in which: all of the front view, the plan view, and the side view of a projection drawing based on the third angle method are ovals; (1) the average (LAV) of the long diameter (L) of the flat portion is 0.13?LAV?500 ?m; (2) the average (DAV) of the short diameter (D) of the flat portion is 0.1?DAV?250 ?m; and (3) the average (P1AV) of the aspect ratio (L/D) calculated from the long diameter (L) and the short diameter (D) is 1.3<P1AV?50.Type: ApplicationFiled: November 1, 2017Publication date: August 22, 2019Applicant: Nisshinbo Holdings Inc.Inventors: Kazutoshi Hayakawa, Toshifumi Hashiba, Mitsugu Takahashi, Goki Yamada, Hiroko Hiraoka
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Publication number: 20180134823Abstract: These flat elliptical polymer particles have a front view, a planar view, and a side view in a projection diagram based on third-angle projection which are all elliptical. The flat elliptical polymer particles satisfy (1)-(4): (1) the average length (LAV) of flat portions satisfies 0.13?(LAV)?500 ?m; (2) the average breadth (DAV) of the flat portions satisfies 0.1?(DAV)?250 ?m; (3) the average (P1AV) aspect ratio (L/D) calculated from the length (L) and the breadth (D) satisfies 1.3<P1AV?50; and (4) the average (P2AV) aspect ratio (D/T) calculated from the breadth (D) and the thickness (T) of the side surface satisfies 1.2<P2AV?100.Type: ApplicationFiled: May 2, 2016Publication date: May 17, 2018Applicant: Nisshinbo Holdings Inc.Inventors: Kazutoshi Hayakawa, Toshifumi Hashiba, Erina Matsuzaka
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Publication number: 20180118867Abstract: Provided are elliptical, needle-shaped, or rod-shaped crosslinked polymer particles in which 5-100 mol % of all repeating units are repeating units derived from an unsaturated monomer having a functional group selected from an epoxy group, a carboxyl group, an amide group, a hydroxy group an amino group, and a thiol group, wherein (1) the average (LAV) length (L) in a two-dimensional projection diagram obtained by irradiating the particles with light from a direction orthogonal to the longitudinal direction is 0.1-80 ?m, (2) the average (DAV) breadth (D) in the two-dimensional projection diagram obtained by irradiating, the particles with light from the direction orthogonal to the longitudinal direction is 0.05-40 ?m, and (3) the average (PAV) aspect ratio (L/D) calculated from the length (L) and the breadth (D) is 1.5-30.Type: ApplicationFiled: May 2, 2016Publication date: May 3, 2018Applicant: Nisshinbo Holdings Inc.Inventors: Kazutoshi Hayakawa, Toshifumi Hashiba, Erina Matsuzaka
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Publication number: 20180104160Abstract: A method for producing elliptical, needle-shaped, or rod-shaped polymer particles satisfying (1)-(3) below includes a step in which a synthesis solution including water, a mixed solvent of a hydrophilic organic solvent and a hydrophobic organic solvent, a polymeric stabilizer, a polymerization initiator, and an unsaturated monomer is heated, and, at least after the heating has started, the pH of the synthesis solution is adjusted to 5-9 inclusive to perform solution polymerization: (1) the average (LAV) length (L) in a two-dimensional projection diagram obtained by irradiating the particles with light from a direction orthogonal to the longitudinal direction is 0.1-80 ?m; (2) the average (DAV) breadth (D) in the two-dimensional projection diagram obtained by irradiating the particles with light from the direction orthogonal to the longitudinal direction is 0.05-40 ?m; and (3) the average (PAV) aspect ratio (L/D) calculated from the length (L) and the breadth (D) is 1.5-30.Type: ApplicationFiled: May 2, 2016Publication date: April 19, 2018Applicant: NISSHINBO HOLDINGS, INC.Inventors: Kazutoshi Hayakawa, Toshifumi Hashiba, Erina Matsuzaka, Goki Yamada
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Publication number: 20160262988Abstract: Provided is an ultraviolet scattering agent characterized by comprising at least one type of elliptical or needle-like polymer particle A, wherein (1) the average (LAV) of the long axis (L) in a two-dimensional projection diagram obtained by radiating light from a direction perpendicular to the long-axis direction is 0.1 to 80 ?m, (2) the average (DAV) of the short axis (D) in a two-dimensional projection diagram obtained by radiating light from a direction perpendicular to the long-axis direction is 0.05 to 40 ?m, and (3) the average (PAV) of the aspect ratio (L/D) calculated from the long axis (L) and the short axis (D) is 2 to 30.Type: ApplicationFiled: November 11, 2014Publication date: September 15, 2016Applicant: NISSHINBO HOLDINGS, INC.Inventors: Kazutoshi HAYAKAWA, Erina MATSUZAKA, Goki YAMADA, Toshifumi HASHIBA
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Patent number: 9093196Abstract: Conductive particles each includes a polymer base particle and a conductive layer coating the polymer base particle. Let the compressive elastic deformation characteristic KX of one conductive particle when the displacement of particle diameter of the conductive particles is X % be defined by the following formula: KX=(3/?2)·(SX?3/2)·(R?1/2)·FX. FX is the load (N) necessary for X % displacement of the conductive particles. SX is the compressive deformation amount (mm) upon X % displacement of the conductive particles. R is the particle radius (mm) of the conductive particles. The compressive elastic deformation characteristic K50 when the displacement of particle diameter of the conductive particles is 50% is 100 to 50000 N/mm2 at 20° C., and the recovery factor of particle diameter of the conductive particles when the displacement of particle diameter of the conductive particles is 50% is not less than 30% at 20° C.Type: GrantFiled: September 28, 2007Date of Patent: July 28, 2015Assignee: NISSHINBO HOLDINGS, INC.Inventors: Toshifumi Hashiba, Kazutoshi Hayakawa, Satomi Kudo, Kohei Moriyama, Tsuyoshi Fujii
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Patent number: 7387832Abstract: Flaky particles which are produced through easy conversion from mother particles by using an organic compound other than monomers having double bonds as the hardening and crosslinking agent and to which at least one mechanical or functional characteristic selected from among reactivity, close adhesion, and tackiness is imparted by the presence of part of the unreacted reactive groups of the organic compound inside and on the particles; and a process for the production of the flaky particles. More specifically, flaky particles composed of mother particles (A) having functional groups and an organic compound (B) which has groups reactive with the functional groups of the particles (A) and is soluble in a solvent, characterized in that at least part of the functional groups of the mother particles (A) and at least part of the reactive groups of the organic compound (B) react with each other to form crosslinks.Type: GrantFiled: September 10, 2003Date of Patent: June 17, 2008Assignee: Nisshinbo Industries, Inc.Inventors: Toshifumi Hashiba, Kazutoshi Hayakawa, Takaya Sato, Hiroshi Yoshida
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Publication number: 20080124552Abstract: A particle with a rough surface for plating or vapor deposition which has been formed from a base (A) having first functional groups on the surface thereof and particles (B) having on the surface thereof second functional groups reactive with the first functional groups and having an average particle diameter which is smaller than the diameter of the base (A) and not smaller than 0.1 ?m, by uniting the base (A) with the particles (B) through chemical bonds between the first functional groups and the second functional groups, wherein the base (A) has at least two projecting parts on the surface thereof. In this particle, the base has been tenaciously bonded to the protruding particles. Because of this, even when the protruding particles used have a size not smaller than the given size, the particle with a rough surface can secure a surface area while maintaining a thickness of a conductive coating film. As a result, the particle can have high conductivity.Type: ApplicationFiled: May 24, 2005Publication date: May 29, 2008Applicant: Nisshinbo Industries, Inc.Inventors: Toshifumi Hashiba, Nami Tsukamoto, Kazutoshi Hayakawa, Satomi Kudo
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Publication number: 20080078977Abstract: Conductive particles each includes a polymer base particle and a conductive layer coating the polymer base particle. Let the compressive elastic deformation characteristic KX of one conductive particle when the displacement of particle diameter of the conductive particles is X % be defined by the following formula: KX=(3/?2)·(SX?3/2)·(R?1/2)·FX. FX is the load (N) necessary for X % displacement of the conductive particles. SX is the compressive deformation amount (mm) upon X % displacement of the conductive particles. R is the particle radius (mm) of the conductive particles. The compressive elastic deformation characteristic K50 when the displacement of particle diameter of the conductive particles is 50% is 100 to 50000 N/mm2 at 20° C., and the recovery factor of particle diameter of the conductive particles when the displacement of particle diameter of the conductive particles is 50% is not less than 30% at 20° C.Type: ApplicationFiled: September 28, 2007Publication date: April 3, 2008Applicant: NISSHINBO INDUSTRIES, INC.Inventors: Toshifumi HASHIBA, Kazutoshi HAYAKAWA, Satomi KUDO, Kohei MORIYAMA, Tsuyoshi FUJII
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Publication number: 20080020207Abstract: A particle having a rough surface and obtained from a particle (A) having grafted on the surface thereof a polymer having first functional groups and particles (B) having grafted on the surface thereof a polymer having second functional groups reactive with the first functional groups, by uniting the particle (A) with the particles (B) through chemical bonds between the first functional groups and the second functional groups. In this particle with a rough surface, the core particle has been tenaciously bonded to the protruding particles. Because of this, even when the protruding particles have an increased particle diameter, the protruding particles can be prevented from readily shedding from the core particle.Type: ApplicationFiled: May 24, 2005Publication date: January 24, 2008Applicant: Nisshinbo Industries, Inc.Inventors: Toshifumi Hashiba, Nami Tsukamoto, Kazutoshi Hayakawa, Satomi Kudo
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Publication number: 20070244241Abstract: Disclosed is a resin composition wherein dispersibility of a modifying agent such as an inorganic substance is improved. The acid resistance of this resin composition is not deteriorated even when a modifying agent is blended therein. Specifically, the resin composition includes a base material having a cyano group-containing organic layer and an organic resin. This resin composition is extremely excellent in acid resistance when compared with organic resins which use a base material having an organic layer not containing a cyano group.Type: ApplicationFiled: April 11, 2005Publication date: October 18, 2007Applicant: NISSHINBO INDUSTRIES, INC.Inventors: Gen Masuda, Toshifumi Hashiba, Kazutoshi Hayakawa, Nami Tsukamoto
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Patent number: 7258921Abstract: A composite particle that can be easily converted to cured particle or half cured particle by the use of carbodiimide resin without changing of the configuration of matrix particle of, for example a thermoplastic resin, excelling in mechanical and functional characteristics by virtue of the reaction capability inherently possessed by a carbodiimide group. In particular, a composite particle comprising matrix particle (A) having a functional group capable of reacting with a carbodiimide group and carbodiimide resin (B), characterized in that the functional group of the matrix particle (A) couples with the carbodiimide group of the carbodiimide resin (B) and that the composite particle is provided with an outer shell layer of carbodiimide resin (B) having an average thickness diameter (L), defined by the following formula [1], ranging from 0.01 to 20 ?m: L=(L2?L1)/2 [1] wherein L1 represents the average diameter of matrix particle, and L2 represents the average diameter of composite particle.Type: GrantFiled: August 7, 2003Date of Patent: August 21, 2007Assignee: Nisshinbo Industries, Inc.Inventors: Toshifumi Hashiba, Kazutoshi Hayakawa, Satomi Kudo, Kaori Satoh, Takaya Sato, Hiroshi Yoshida