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).
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Patent number: 11932712Abstract: 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: GrantFiled: October 7, 2020Date of Patent: March 19, 2024Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Hisako Nakamura, Michio Matsuda, Hirotoshi Sakashita
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Patent number: 11851822Abstract: 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: GrantFiled: February 8, 2021Date of Patent: December 26, 2023Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Yuuki Yamamoto, Michio Matsuda, Tetsuya Uehara, Hirotoshi Sakashita
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Publication number: 20230250589Abstract: 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: ApplicationFiled: April 13, 2023Publication date: August 10, 2023Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Michio MATSUDA, Hirotoshi SAKASHITA, Nozomi YAMAGUCHI, Tetsuya UEHARA, Daisuke NOGUCHI, Shun SHIBATA
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Publication number: 20230096888Abstract: 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: ApplicationFiled: September 16, 2022Publication date: March 30, 2023Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Michio MATSUDA, Hirotoshi SAKASHITA, Tetsuya UEHARA, Daisuke NOGUCHI
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Patent number: 11572434Abstract: 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: GrantFiled: March 30, 2018Date of Patent: February 7, 2023Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Tsuneo Yamashita, Eiji Sakamoto, Saya Nii, Hirotoshi Sakashita
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Publication number: 20220081842Abstract: 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: ApplicationFiled: November 29, 2021Publication date: March 17, 2022Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Tetsuya UEHARA, Michio MATSUDA, Hirotoshi SAKASHITA, Yuuki YAMAMOTO, Daisuke NOGUCHI
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Publication number: 20210189052Abstract: 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: ApplicationFiled: March 30, 2018Publication date: June 24, 2021Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Tsuneo YAMASHITA, Eiji SAKAMOTO, Saya NII, Hirotoshi SAKASHITA
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Publication number: 20210164165Abstract: 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: ApplicationFiled: February 8, 2021Publication date: June 3, 2021Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Yuuki YAMAMOTO, Michio Matsuda, Tetsuya Uehara, Hirotoshi Sakashita
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Publication number: 20210102020Abstract: 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: ApplicationFiled: October 7, 2020Publication date: April 8, 2021Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Hisako NAKAMURA, Michio Matsuda, Hirotoshi Sakashita
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Patent number: 7803892Abstract: 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: GrantFiled: February 5, 2004Date of Patent: September 28, 2010Assignee: Daikin Industries, Ltd.Inventors: Tsukasa Aga, Hirotoshi Sakashita, Masato Ioki, Masahiro Miyahara
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Patent number: 7307131Abstract: 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: GrantFiled: January 28, 2005Date of Patent: December 11, 2007Assignee: Daikin Industries, Ltd.Inventors: Shigeru Morita, Hirotoshi Sakashita, Takayuki Araki, Tetsuo Shimizu
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Publication number: 20060148353Abstract: 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: ApplicationFiled: February 5, 2004Publication date: July 6, 2006Inventors: Tsukasa Aga, Hirotoshi Sakashita, Masato Ioki, Masahiro Miyahara
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Patent number: 6930159Abstract: 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: GrantFiled: March 10, 2000Date of Patent: August 16, 2005Assignee: Daikin Industries, Ltd.Inventors: Shigeru Morita, Hirotoshi Sakashita, Takayuki Araki, Tetsuo Shimizu
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Publication number: 20050131145Abstract: 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: ApplicationFiled: January 28, 2005Publication date: June 16, 2005Inventors: Shigeru Morita, Hirotoshi Sakashita, Takayuki Araki, Tetsuo Shimizu
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Patent number: 6274060Abstract: 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: GrantFiled: February 4, 2000Date of Patent: August 14, 2001Assignee: Daikin Industries, Ltd.Inventors: Hirotoshi Sakashita, Masamichi Morita, Motonobu Kubo
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Patent number: 6074588Abstract: 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: GrantFiled: May 15, 1996Date of Patent: June 13, 2000Assignee: Daikin Industries, Ltd.Inventors: Masayuki Yamana, Tomohiro Hosomi, Hirotoshi Sakashita, Masato Kashiwagi
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Patent number: 5804674Abstract: 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: GrantFiled: April 21, 1997Date of Patent: September 8, 1998Assignee: Daikin Industries, Ltd.Inventors: Masayuki Yamana, Yasushi Nakamae, Hirotoshi Sakashita, Masato Kashiwagi
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Patent number: 5734001Abstract: 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: GrantFiled: November 20, 1996Date of Patent: March 31, 1998Assignee: Daikin Industries, Ltd.Inventors: Fumihiko Yamaguchi, Tatsuya Otsuka, Masayuki Yamana, Masato Kashiwagi, Hirotoshi Sakashita