Patents by Inventor Hirotoshi Sakashita

Hirotoshi Sakashita 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).

  • Patent number: 11932712
    Abstract: Provided are a fluorine-free soil resistant agent and a soil resistant treatment method which give excellent water-repellency and excellent antifouling property to a substrate, especially a carpet. The soil resistant agent contains (1) a fluorine-free copolymer having (a) a repeating unit formed from an acrylic monomer having a hydrocarbon group containing 7 to 40 carbon atoms, and (b) a repeating unit formed from an acrylic monomer having a hydrophilic group, and (2) water or a mixture of water and an organic solvent dispersing the fluorine-free copolymer (1). A method of treating the substrate, includes applying the soil resistant agent to the substrate.
    Type: Grant
    Filed: October 7, 2020
    Date of Patent: March 19, 2024
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Hisako Nakamura, Michio Matsuda, Hirotoshi Sakashita
  • Patent number: 11851822
    Abstract: An oil-resistant agent for paper, which contains a non-fluorine copolymer that has a repeating unit formed from (a) an acrylic monomer having a long-chain hydrocarbon group with 7-40 carbon atoms and a repeating unit formed from (b) an acrylic monomer having a hydrophilic group. The oil-resistant agent for paper also contains a liquid medium that is composed of water and/or an organic solvent, preferably of water or a mixture (aqueous medium) of water and an organic solvent. The non-fluorine copolymer preferably has a repeating unit formed from (c) a monomer having an ion donor group in addition to the repeating units formed from the monomers (a) and (b). Also disclosed is an oil-resistant paper having an oil-resistant layer including the oil-resistant agent for paper, and starch or modified starch, on a surface of the paper as well as a method of treating paper.
    Type: Grant
    Filed: February 8, 2021
    Date of Patent: December 26, 2023
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Yuuki Yamamoto, Michio Matsuda, Tetsuya Uehara, Hirotoshi Sakashita
  • Publication number: 20230250589
    Abstract: An oil-resistant agent and an oil-resistant composition, which are capable of imparting excellent oil-resistance to paper. The oil-resistant composition contains a polysaccharide (1) and an oil-resistant polymer (2). The polysaccharide (1) is preferably starch. The oil-resistant polymer (2) preferably has (a) a repeating unit formed from an acrylic monomer that has a long-chain hydrocarbon group having 7-40 carbon atoms, and (b) a repeating unit formed from an acrylic monomer that has a hydrophilic group. A polyvinyl alcohol or glucose may be present as an additive.
    Type: Application
    Filed: April 13, 2023
    Publication date: August 10, 2023
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Michio MATSUDA, Hirotoshi SAKASHITA, Nozomi YAMAGUCHI, Tetsuya UEHARA, Daisuke NOGUCHI, Shun SHIBATA
  • Publication number: 20230096888
    Abstract: A non-fluorinated copolymer composition containing (1) a fluorine-free copolymer and (2) acetylene alcohol. The non-fluorinated copolymer (1) has a repeating unit formed from (a) an acrylic monomer having a long-chain hydrocarbon group having 7 to 40 carbon atoms; and a repeating unit formed from (c) an acrylic monomer having an olefinic carbon-carbon double bond and an ion donating group. Also disclosed is an oil-resistant agent containing a fluorine-free composition including (1) a fluorine-free copolymer, and (2) an acetylene alcohol, wherein the fluorine-free copolymer (1) has a repeating unit formed from (a) an acrylic monomer having a long-chain hydrocarbon group having 7 to 40 carbon atoms; an oil-resistant agent kit; a method for producing the fluorine-free copolymer; an oil-resistant paper; and a method for eliminating foam during treatment of paper with the fluorine-free copolymer composition.
    Type: Application
    Filed: September 16, 2022
    Publication date: March 30, 2023
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Michio MATSUDA, Hirotoshi SAKASHITA, Tetsuya UEHARA, Daisuke NOGUCHI
  • Patent number: 11572434
    Abstract: A composition including at least one compound having a perfluoropolyether group and a curable site, wherein in a molecular weight distribution curve in gel permeation chromatography measurement, the following formula is satisfied: M2/M1?3.5, wherein M1 is a molecular weight at a main peak, and M2 is a molecular weight at 25% intensity of an intensity of the main peak on a higher molecular weight side than M1. Also disclosed is a curable composition containing the composition and a method for producing the curable composition.
    Type: Grant
    Filed: March 30, 2018
    Date of Patent: February 7, 2023
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Tsuneo Yamashita, Eiji Sakamoto, Saya Nii, Hirotoshi Sakashita
  • Publication number: 20220081842
    Abstract: A paper oil-resistant agent which is added to the interior of paper and includes (1) a non-fluorine polymer and (2) at least one type of particles selected from inorganic particles or organic particles, the amount of the particles (2) being 1-99.9 wt % of the total weight of the non-fluorine polymer (1) and the particles (2). Also disclosed is an oil-resistant paper including the paper oil-resistant agent and a method for producing the oil-resistant paper.
    Type: Application
    Filed: November 29, 2021
    Publication date: March 17, 2022
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Tetsuya UEHARA, Michio MATSUDA, Hirotoshi SAKASHITA, Yuuki YAMAMOTO, Daisuke NOGUCHI
  • Publication number: 20210189052
    Abstract: A composition including at least one compound having a perfluoropolyether group and a curable site, wherein in a molecular weight distribution curve in gel permeation chromatography measurement, the following formula is satisfied: M2/M1?3.5, wherein M1 is a molecular weight at a main peak, and M2 is a molecular weight at 25% intensity of an intensity of the main peak on a higher molecular weight side than M1. Also disclosed is a curable composition containing the composition and a method for producing the curable composition.
    Type: Application
    Filed: March 30, 2018
    Publication date: June 24, 2021
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Tsuneo YAMASHITA, Eiji SAKAMOTO, Saya NII, Hirotoshi SAKASHITA
  • Publication number: 20210164165
    Abstract: An oil-resistant agent for paper, which contains a non-fluorine copolymer that has a repeating unit formed from (a) an acrylic monomer having a long-chain hydrocarbon group with 7-40 carbon atoms and a repeating unit formed from (b) an acrylic monomer having a hydrophilic group. The oil-resistant agent for paper also contains a liquid medium that is composed of water and/or an organic solvent, preferably of water or a mixture (aqueous medium) of water and an organic solvent. The non-fluorine copolymer preferably has a repeating unit formed from (c) a monomer having an ion donor group in addition to the repeating units formed from the monomers (a) and (b). Also disclosed is an oil-resistant paper having an oil-resistant layer including the oil-resistant agent for paper, and starch or modified starch, on a surface of the paper as well as a method of treating paper.
    Type: Application
    Filed: February 8, 2021
    Publication date: June 3, 2021
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Yuuki YAMAMOTO, Michio Matsuda, Tetsuya Uehara, Hirotoshi Sakashita
  • Publication number: 20210102020
    Abstract: Provided are a fluorine-free soil resistant agent and a soil resistant treatment method which give excellent water-repellency and excellent antifouling property to a substrate, especially a carpet. The soil resistant agent contains (1) a fluorine-free copolymer having (a) a repeating unit formed from an acrylic monomer having a hydrocarbon group containing 7 to 40 carbon atoms, and (b) a repeating unit formed from an acrylic monomer having a hydrophilic group, and (2) water or a mixture of water and an organic solvent dispersing the fluorine-free copolymer (1). A method of treating the substrate, includes applying the soil resistant agent to the substrate.
    Type: Application
    Filed: October 7, 2020
    Publication date: April 8, 2021
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Hisako NAKAMURA, Michio Matsuda, Hirotoshi Sakashita
  • Patent number: 7803892
    Abstract: An aqueous emulsion composition comprising (A) an aqueous resin emulsion comprising a fluorine-containing polymer and (B) a surfactant of the formula: R1O—(CH2CH2O)p—(R2O)q—R3??(1) wherein R1 is an alkyl group or an alkenyl group, R2 is an alkylene group, R3 is a hydrogen atom, an alkyl group or an alkenyl group, p is the number of at least 2, q is the number of at least 1, and p and q are such numbers that the weight ratio of the polyoxyethylene block is from 5 to 80% by weight based on whole molecule, is excellent in stability against impurity and mechanical stability.
    Type: Grant
    Filed: February 5, 2004
    Date of Patent: September 28, 2010
    Assignee: Daikin Industries, Ltd.
    Inventors: Tsukasa Aga, Hirotoshi Sakashita, Masato Ioki, Masahiro Miyahara
  • Patent number: 7307131
    Abstract: A fluorine-containing allyl ether polymer having a number average molecular weight of 1,000 to 1,000,000 and consisting of chains of at least one repeating unit of the formula: wherein A is an organic group having 1 to 100 carbon atoms.
    Type: Grant
    Filed: January 28, 2005
    Date of Patent: December 11, 2007
    Assignee: Daikin Industries, Ltd.
    Inventors: Shigeru Morita, Hirotoshi Sakashita, Takayuki Araki, Tetsuo Shimizu
  • Publication number: 20060148353
    Abstract: An aqueous emulsion composition comprising (A) an aqueous resin emulsion comprising a fluorine-containing polymer and (B) a surfactant of the formula: R1O—(CH2CH2O)p—(R2O)q—R3 ??(1) wherein R1 is an alkyl group or an alkenyl group, R2 is an alkylene group, R3 is a hydrogen atom, an alkyl group or an alkenyl group, p is the number of at least 2, q is the number of at least 1, and p and q are such numbers that the weight ratio of the polyoxyethylene block is from 5 to 80% by weight based on whole molecule, is excellent in stability against impurity and mechanical stability.
    Type: Application
    Filed: February 5, 2004
    Publication date: July 6, 2006
    Inventors: Tsukasa Aga, Hirotoshi Sakashita, Masato Ioki, Masahiro Miyahara
  • Patent number: 6930159
    Abstract: A fluorine-containing allyl ether polymer having a number average molecular weight of 1,000 to 1,000,000 and consisting of chains of at least one repeating unit of the formula: wherein A is an organic group having 1 to 100 carbon atoms.
    Type: Grant
    Filed: March 10, 2000
    Date of Patent: August 16, 2005
    Assignee: Daikin Industries, Ltd.
    Inventors: Shigeru Morita, Hirotoshi Sakashita, Takayuki Araki, Tetsuo Shimizu
  • Publication number: 20050131145
    Abstract: A fluorine-containing allyl ether polymer having a number average molecular weight of 1,000 to 1,000,000 and consisting of chains of at least one repeating unit of the formula: wherein A is an organic group having 1 to 100 carbon atoms.
    Type: Application
    Filed: January 28, 2005
    Publication date: June 16, 2005
    Inventors: Shigeru Morita, Hirotoshi Sakashita, Takayuki Araki, Tetsuo Shimizu
  • Patent number: 6274060
    Abstract: A water- and oil-repellent containing a copolymer of (a) a fluoroalkyl group-containing monomer having a melting point of 60 to 80° C. in the state of a homopolymer, and (b) a hydrophilic group-containing monomer is extremely superior in soil releasability.
    Type: Grant
    Filed: February 4, 2000
    Date of Patent: August 14, 2001
    Assignee: Daikin Industries, Ltd.
    Inventors: Hirotoshi Sakashita, Masamichi Morita, Motonobu Kubo
  • Patent number: 6074588
    Abstract: A mold releasing agent comprising a silicon-containing compound represented by the formula:R.sup.1.sub.n SiR.sup.2.sub.4-nwherein R.sup.1 is ##STR1## (R.sup.3 and R.sup.4 are a hydrocarbon group having 1 to 4 carbon atoms), R.sup.2 is a hydrocarbon group having 1 to 4 carbon atoms or a halogenated hydrocarbon group having 1 to 4 carbon atoms, n is 3 or 4, and a silicon- and/or fluorine-containing compound having at least two hydroxyl groups or alkoxyl groups in one molecule. The mold releasing agent of the present invention is excellent in mold releasing property, has a long life, provides a good surface finishing of molded article, and has no influence on secondary processability.
    Type: Grant
    Filed: May 15, 1996
    Date of Patent: June 13, 2000
    Assignee: Daikin Industries, Ltd.
    Inventors: Masayuki Yamana, Tomohiro Hosomi, Hirotoshi Sakashita, Masato Kashiwagi
  • Patent number: 5804674
    Abstract: A mold release agent containing (A) a silane compound, (B) a silicon and/or fluorine-containing compound having at least two hydroxyl groups or alkoxy groups in one molecule and (C) a polymer of a perfluoroalkyl group-containing (meth)acrylate ester gives a long mold release life and a good surface finishing property of a molded article, and does not exert a harmful influence on fabricability such as painting and adhesion of the molded article.
    Type: Grant
    Filed: April 21, 1997
    Date of Patent: September 8, 1998
    Assignee: Daikin Industries, Ltd.
    Inventors: Masayuki Yamana, Yasushi Nakamae, Hirotoshi Sakashita, Masato Kashiwagi
  • Patent number: 5734001
    Abstract: A novel fluorosilicone compound having at least two hydroxyl groups in its molecule and a curable composition containing such a compound and a commercially available general purpose curing agent; the compound is used suitably for a lubricant and a fiber treating agent, and the curable composition is used suitably for a mold releasing agent, a water- and oil-repelling agent, a stain-proof coating agent, a non-tackifying coating agent, a coating agent for optical use and a sealant.
    Type: Grant
    Filed: November 20, 1996
    Date of Patent: March 31, 1998
    Assignee: Daikin Industries, Ltd.
    Inventors: Fumihiko Yamaguchi, Tatsuya Otsuka, Masayuki Yamana, Masato Kashiwagi, Hirotoshi Sakashita