Patents by Inventor Hotaka Yamamuro
Hotaka Yamamuro 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: 8728229Abstract: The present invention provides a cement slurry composition, containing a hydraulic cement material, (A) a first water-soluble low molecular weight compound and (B) a second water-soluble low molecular weight compound differing from the compound (A), wherein a combination of the compounds (A) and (B) is (I) the compound (A) selected from cationic surfactants and the compound (B) selected from anionic aromatic compounds; or (II) the compound (A) selected from cationic surfactants and the compound (B) selected from brominated compounds, and in the compound (A), a ratio of compounds having a hydrocarbon group of 18 or more carbon atoms is not less than 45% by weight.Type: GrantFiled: June 11, 2009Date of Patent: May 20, 2014Assignee: Kao CorporationInventors: Koji Koyanagi, Toshiharu Kojima, Hotaka Yamamuro
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Patent number: 8648120Abstract: The present invention provides a liquid rheology modifier containing compounds (A) and (B) selected from combination (1) of compound (A) selected from cationic surfactants and compound (B) selected from anionic aromatic compounds and combination (2) of compound (A) from cationic surfactants and compound (B) selected from brominated compounds; and dicarboxylic acid (C).Type: GrantFiled: September 5, 2007Date of Patent: February 11, 2014Assignee: Kao CorporationInventors: Koji Koyanagi, Hotaka Yamamuro, Toshiharu Kojima
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Patent number: 8105500Abstract: A slurry rheology modifier comprises a first water-soluble low-molecular compound [referred to hereinafter as compound (A)] and a second water-soluble low-molecular compound [referred to hereinafter as compound (B)] being different from the compound (A), wherein the viscosity of an aqueous solution at 20° C. prepared by mixing an aqueous solution SA (with a viscosity at 20° C. of 100 mPa·s or less) of compound (A) with an aqueous solution SB (with a viscosity at 20° C. of 100 mPa·s or less) of compound (B) in the ratio of 50/50 by weight can be at least twice as high as the viscosity of either aqueous solution before mixed.Type: GrantFiled: April 30, 2008Date of Patent: January 31, 2012Assignee: Kao CorporationInventors: Hotaka Yamamuro, Koji Koyanagi, Daisuke Shiba
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Publication number: 20120000397Abstract: The present invention provides a cement slurry composition, containing a hydraulic cement material, (A) a first water-soluble low molecular weight compound and (B) a second water-soluble low molecular weight compound differing from the compound (A), wherein a combination of the compounds (A) and (B) is (I) the compound (A) selected from cationic surfactants and the compound (B) selected from anionic aromatic compounds; or (II) the compound (A) selected from cationic surfactants and the compound (B) selected from brominated compounds, and in the compound (A), a ratio of compounds having a hydrocarbon group of 18 or more carbon atoms is not less than 45% by weight.Type: ApplicationFiled: June 11, 2009Publication date: January 5, 2012Inventors: Koji Koyanagi, Toshiharu Kojima, Hotaka Yamamuro
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Patent number: 7846876Abstract: The present invention relates to a surfactant composition containing a cationic surfactant (hereinafter referred to as a compound (A)), one or more compounds (hereinafter referred to as a compound (B)) selected from anionic aromatic compounds and bromide compounds and a cationic polymer (C), wherein compound (A) and (B) are selected when meeting the following condition: a combination of the compounds (A) and (B) ensures that that the viscosity (20° C.) of a solution prepared by mixing an aqueous solution SA of the compound (A) and an aqueous solution SB of the compound (B) in the same ratio is at least two times the viscosity of any one of the aqueous solutions (20° C.) before being mixed.Type: GrantFiled: October 6, 2004Date of Patent: December 7, 2010Assignee: Kao CorporationInventors: Koji Koyanagi, Sadahara Miyamoto, Hotaka Yamamuro
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Patent number: 7501021Abstract: Disclosed is a powdery rheology modifier containing an anionic aromatic compound, a cationic surfactant, and an inorganic powder having a specific surface area of 5000 cm2/g or more.Type: GrantFiled: May 31, 2007Date of Patent: March 10, 2009Assignee: Kao CorporationInventors: Koji Koyanagi, Fujio Yamato, Toshiharu Kojima, Hotaka Yamamuro
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Publication number: 20080300341Abstract: A slurry rheology modifier comprises a first water-soluble low-molecular compound [referred to hereinafter as compound (A)] and a second water-soluble low-molecular compound [referred to hereinafter as compound (B)] being different from the compound (A), wherein the viscosity of an aqueous solution at 20° C. prepared by mixing an aqueous solution SA (with a viscosity at 20° C. of 100 mPa·s or less) of compound (A) with an aqueous solution SB (with a viscosity at 20° C. of 100 mPa·s or less) of compound (B) in the ratio of 50/50 by weight can be at least twice as high as the viscosity of either aqueous solution before mixed.Type: ApplicationFiled: April 30, 2008Publication date: December 4, 2008Inventors: Hotaka Yamamuro, Koji Koyanagi, Daisuke Shiba
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Publication number: 20080262129Abstract: The present invention provides production of a powder containing the cationic surfactant (b) by mixing an anionic aromatic compound (a), a cationic surfactant (b) and water to obtain a viscous material and feeding the viscous material heated at the specific temperature to the drying step.Type: ApplicationFiled: April 3, 2008Publication date: October 23, 2008Applicant: Kao CorporationInventors: Hotaka YAMAMURO, Toshiharu KOJIMA, Yoshikazu MORII, Koji KOYANAGI
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Patent number: 7374699Abstract: A slurry rheology modifier comprises a first water-soluble low-molecular compound [referred to hereinafter as compound (A)] and a second water-soluble low-molecular compound [referred to hereinafter as compound (B)] being different from the compound (A), wherein the viscosity of an aqueous solution at 20° C. prepared by mixing an aqueous solution SA (with a viscosity at 20° C. of 100 mPa·s or less) of compound (A) with an aqueous solution SB (with a viscosity at 20° C. of 100 mPa·s or less) of compound (B) in the ratio of 50/50 by weight can be at least twice as high as the viscosity of either aqueous solution before mixed.Type: GrantFiled: June 14, 2002Date of Patent: May 20, 2008Assignee: Kao CorporationInventors: Hotaka Yamamuro, Koji Koyanagi, Daisuke Shiba
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Publication number: 20080078814Abstract: The present invention provides a liquid rheology modifier containing compounds (A) and (B) selected from combination (1) of compound (A) selected from cationic surfactants and compound (B) selected from anionic aromatic compounds and combination (2) of compound (A) from cationic surfactants and compound (B) selected from brominated compounds; and dicarboxylic acid (C).Type: ApplicationFiled: September 5, 2007Publication date: April 3, 2008Applicant: Kao CorporationInventors: Koji Koyanagi, Hotaka Yamamuro, Toshiharu Kojima
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Publication number: 20080058227Abstract: The present invention relates to a surfactant composition containing a cationic surfactant (hereinafter referred to as a compound (A)), one or more compounds (hereinafter referred to as a compound (B)) selected from anionic aromatic compounds and bromide compounds and a cationic polymer (C), wherein compound (A) and (B) are selected when meeting the following condition: a combination of the compounds (A) and (B) ensures that that the viscosity (20° C.) of a solution prepared by mixing an aqueous solution S A of the compound (A) and an aqueous solution SB of the compound (B) in the same ratio is at least two times the viscosity of any one of the aqueous solutions (20° C.) before being mixed.Type: ApplicationFiled: October 6, 2004Publication date: March 6, 2008Applicant: Kao CorporationInventors: Koji Koyanagi, Sadahara Miyamoto, Hotaka Yamamuro
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Publication number: 20070290160Abstract: Disclosed is a powdery rheology modifier containing an anionic aromatic compound, a cationic surfactant, and an inorganic powder having a specific surface area of 5000 cm2/g or more.Type: ApplicationFiled: May 31, 2007Publication date: December 20, 2007Applicant: Kao CorporationInventors: Koji Koyanagi, Fujio Yamato, Toshiharu Kojima, Hotaka Yamamuro
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Publication number: 20030200901Abstract: A slurry rheology modifier comprises a first water-soluble low-molecular compound [referred to hereinafter as compound (A)] and a second water-soluble low-molecular compound [referred to hereinafter as compound (B)] being different from the compound (A), wherein the viscosity of an aqueous solution at 20° C. prepared by mixing an aqueous solution SA (with a viscosity at 20° C. of 100 mPa·s or less) of compound (A) with an aqueous solution SB (with a viscosity at 20° C. of 100 mPa·s or less) of compound (B) in the ratio of 50/50 by weight can be at least twice as high as the viscosity of either aqueous solution before mixed.Type: ApplicationFiled: June 14, 2002Publication date: October 30, 2003Inventors: Hotaka Yamamuro, Koji Koyanagi, Daisuke Shiba
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Patent number: 6068697Abstract: A polysaccharide derivative prepared by replacing all or part of the hydroxyl hydrogen atoms of a polysaccharide or polysaccharide derivative by (A) a hydrophobic substituent having a C.sub.8 -C.sub.43 hydrocarbon chain as the partial structure and (B) an ionic hydrophilic substituent having at least one member selected from the group consisting of sulfonic, carboxyl phosphoric, and sulfate groups and salts thereof as the partial structure, wherein the average degree of replacement by the substituent (A) is 0.0001 or above but below 0.001 per constituent monosaccharide residue as determined by Zeisel's method or the diazomethane method and that by the substituent (B) is 0.01 to 2.0 per constituent monosaccharide residue as determined by colloidal titration. This polysaccharide derivative is useful as the admixture for hydraulic materials and can give stable hydraulic compositions excellent in dispersion.Type: GrantFiled: July 14, 1998Date of Patent: May 30, 2000Assignee: Kao CorporationInventors: Hotaka Yamamuro, Takeshi Ihara, Tomohito Kitsuki, Tetsuya Miyajima, Fujio Yamato, Makoto Kohama
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Patent number: 5720807Abstract: A hydraulic composition comprising a water-soluble polymer in the form of a polyalkylene oxide derivative having a hydroxyl number of at most 50 KCH-mg/g in terms of terminal hydroxyl groups rendered hydrophobic, a surfactant having a weight-average molecular weight of at most 5,000, a superplasticizer, and a hydraulic powder, which can be endowed with high flowability, aggregate segregation resistance, and strength to remarkably improve the method of using concrete and the method of placing concrete and to thereby greatly enhance the far-reaching effect of eliminating noise pollution particularly in the production of concrete products and streamlining the production of the concrete products.Type: GrantFiled: August 22, 1996Date of Patent: February 24, 1998Assignee: Kao CorporationInventors: Tatsuo Izumi, Hotaka Yamamuro, Shin Murahara, Akira Kurara
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Patent number: 5674316Abstract: The present invention is directed to a hydraulic composition comprising (a) a water soluble polymer, (b) a superplasticizer which is a copolymer obtained by polymerizing a monomer (C-1) represented by the following Formula (1) with at least one monomer (C-2) selected from the compounds represented by the following Formulas (2) and (3): ##STR1## (wherein R.sub.1 and R.sub.2 each represent hydrogen or methyl; ml represents an integer of 0 to 32; AO represents an oxyalkylene group having a carbon number of 2 to 3; n represents an integer of 2 to 300; and X represents hydrogen or an alkyl group having a carbon number of 1 to 3); ##STR2## (wherein R.sub.3 to R.sub.5 each represent hydrogen, methyl or (CH.sub.2).sub.m2 COOM.sub.2 ; R.sub.6 represents hydrogen or methyl; M.sub.1, M.sub.2 and Y each represent hydrogen, alkali metal, alkaline earth metal, ammonium, alkylammonium, or substituted alkylammonium; and M.sub.2 represents an integer of 0 to 2); and (c) a hydraulic powder.Type: GrantFiled: June 16, 1995Date of Patent: October 7, 1997Assignee: Kao CorporationInventors: Tatsuo Izumi, Hotaka Yamamuro, Shin Murahara, Takaaki Tadokoro