Patents by Inventor Takaaki Tadokoro
Takaaki Tadokoro 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: 7297229Abstract: This invention is to provide a paper bulking promoter with which a highly bulky sheet can be obtained without impairing paper strength. Namely, this invention provides a process for producing a bulky paper, comprising the step of making paper from pulp in the presence of a bulking promoter comprising a cationic compound.Type: GrantFiled: April 25, 2003Date of Patent: November 20, 2007Assignee: KAO CorporationInventors: Yasushi Ikeda, Yoichi Ishibashi, Takaaki Tadokoro, Hiromichi Takahashi
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Patent number: 7122098Abstract: The present invention provides a paper quality improver for papermaking, for improving bulk value, brightness, and opacity of the pulp sheet. Further, the present invention provides a dry efficiency improver. A compound is used as the paper quality improver for papermaking, wherein the compound has less than 4% of lyotropic degree measured by a specific method and the compound satisfies at least two selected from (i) standard improved bulky value of not less than 0.02 g/cm3, (ii) standard improved brightness of not less than 0.5 point and (iii) standard improved opacity of not less than 0.5 point. The compound is added internally into pulp slurry before or in papermaking step.Type: GrantFiled: December 28, 1999Date of Patent: October 17, 2006Assignee: Kao CorporationInventors: Takaaki Tadokoro, Yasushi Ikeda, Toshiyuki Nishimori, Hiromichi Takahashi
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Publication number: 20030201084Abstract: This invention is to provide a paper bulking promoter with which a highly bulky sheet can be obtained without impairing paper strength. Namely, this invention provides a process for producing a bulky paper, comprising the step of making paper from pulp in the presence of a bulking promoter comprising a cationic compound.Type: ApplicationFiled: April 25, 2003Publication date: October 30, 2003Applicant: Kao CorporationInventors: Yasushi Ikeda, Yoichi Ishibashi, Takaaki Tadokoro, Hiromichi Takahashi
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Patent number: 6599392Abstract: According to the present invention, a bulky sheet can be obtained without reducing the effect of a sizing agent. Thus, an ester compound having the melting point of not more than 100° C. selected from (A) an ester compound of a polyhydric alcohol and a fatty acid and (B) an ester compound of a polyhydric alcohol and a fatty acid further including from more than 0 mole to less than 12 moles on the average of C2-4 oxyalkylene groups per 1 mole of the said ester compound is used as a paper bulking promoter.Type: GrantFiled: February 2, 2000Date of Patent: July 29, 2003Assignee: Kao CorporationInventors: Takaaki Tadokoro, Yasushi Ikeda, Takayuki Ikenaga, Atsuhito Mori, Yoichi Ishibashi, Yasuo Ishii, Toshiyuki Nishimori, Hiromichi Takahashi
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Patent number: 6576085Abstract: This invention provides a paper bulking promoter with which a highly bulky sheet can be obtained without impairing paper strength. Namely, this invention provides a process for producing a bulky paper, having the step of making paper from pulp in the presence of a bulking promoter having at least one compound selected from the group consisting of a cationic compound, an amine compound, an acid salt of an amine compound, an amphoteric compound, an amide compound, a quaternary ammonium salt, and an imidazoline derivative.Type: GrantFiled: September 21, 2001Date of Patent: June 10, 2003Assignee: Kao CorporationInventors: Yasushi Ikeda, Yoichi Ishibashi, Takaaki Tadokoro, Hiromichi Takahashi
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Patent number: 6565708Abstract: The present invention provides a paper quality improver composition for papermaking, which is excellent in improved efficiencies of bulky value, brightness, opacity and the like of pulp sheet, demanded at lightening paper and increasing a blending amount of deinked pulp, even by adding a small amount thereof as well as which is further excellent in an improved efficiency of paper-strength. That is, the present invention provides a paper quality improver composition for papermaking; which comprises (A) a compound having lyotropic degree measured by a specific method of not less than 4% and satisfying at least two of (i) standard improved bulky value of not less than 0.02 g/cm3, (ii) standard improved brightness of not less than 0.5 point, and (iii) standard improved opacity of not less than 0.5 point and (B) a water-soluble polymer satisfying an average molecular weight and/or a viscosity thereof of specific value.Type: GrantFiled: December 19, 2000Date of Patent: May 20, 2003Assignee: Kao CorporationInventors: Yasushi Ikeda, Takaaki Tadokoro, Hiromichi Takahashi
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Publication number: 20020117278Abstract: The present invention provides a paper quality improver composition for papermaking, which is excellent in improved efficiencies of bulky value, brightness, opacity and the like of pulp sheet, demanded at lightening paper and increasing a blending amount of deinked pulp, even by adding a small amount thereof as well as which is further excellent in an improved efficiency of paper-strength. That is, the present invention provides a paper quality improver composition for papermaking; which comprises (A) a compound having lyotropic degree measured by a specific method of not less than 4% and satisfying at least two of (i) standard improved bulky value of not less than 0.02 g/cm3, (ii) standard improved brightness of not less than 0.5 point, and (iii) standard improved opacity of not less than 0.5 point and (B) a water-soluble polymer satisfying an average molecular weight and/or a viscosity thereof of specific value.Type: ApplicationFiled: December 19, 2000Publication date: August 29, 2002Inventors: Yasushi Ikeda, Takaaki Tadokoro, Hiromichi Takahashi
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Publication number: 20020096283Abstract: This invention is to provide a paper bulking promoter with which a highly bulky sheet can be obtained without impairing paper strength.Type: ApplicationFiled: September 21, 2001Publication date: July 25, 2002Applicant: Kao Corporation.Inventors: Yasushi Ikeda, Yoichi Ishibashi, Takaaki Tadokoro, Hiromichi Takahashi
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Patent number: 6346169Abstract: This invention is to provide a paper bulking promoter with which a highly bulky sheet can be obtained without impairing paper strength. Namely, this invention provides a process for producing a bulky paper, comprising the step of making paper from pulp in the presence of a bulking promoter comprising at least one compound selected from the group consisting of a cationic compound, an amine compound, an acid salt of an amine compound, an amphoteric compound, an amide compound, a quaternary ammonium salt, and an imidazoline derivative.Type: GrantFiled: December 31, 1998Date of Patent: February 12, 2002Assignee: Kao CorporationInventors: Yasushi Ikeda, Yoichi Ishibashi, Takaaki Tadokoro, Hiromichi Takahashi
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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