Patents by Inventor Yoshiyuki Onda
Yoshiyuki Onda 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: 7662884Abstract: It is an object of the present invention, which has been made in view of the above-mentioned state of the art, to provide a cement admixture capable of improving the water-reducing ability of cement compositions and the like and enhancing the strength and durability of hardened products produced therefrom and further capable of adjusting the viscosity of such compositions so as to facilitate the works at the sites of handling the same, as well as a method of producing such cement additive. A cement admixture comprising a polycarboxylic acid polymer and a nitrogen atom-containing compound having non-amide bond, wherein the mass ratio (A/B) between the mass (A) of said polycarboxylic acid polymer and the mass (B) of said nitrogen atom-containing compound having non-amide bond satisfies the relation 200>(A/B)>1.Type: GrantFiled: April 23, 2003Date of Patent: February 16, 2010Assignee: Nippon Shokubai Co., Ltd.Inventors: Tsutomu Yuasa, Hiromichi Tanaka, Noboru Sakamoto, Tomotaka Nishikawa, Hiroko Izukashi, Toru Uno, Tsuyoshi Hirata, Tomiyasu Ueta, Yoshiyuki Onda
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Patent number: 7405264Abstract: It is an object of the present invention to provide a polycarboxylic acid polpolymer which improves the water reducing capacity and workability of cement compositions and the like and making them easier to handle when the fluidity and water reducing capacity are at the same levels, a method of producing the copolymer, and a cement additive and a cement composition comprising the copolymer. The present invention is further to provide a polycarboxylic acid copolymer and a cement additive which are capable of improving the strength and durability of hardening products of cement compositions, hence can advantageously be used in ultrahigh strength concrete. The present invention is polycarboxylic acid copolymers having high water reducing capacity, reducing the viscosity of cement compositions and improving the workability in applying cement.Type: GrantFiled: August 19, 2004Date of Patent: July 29, 2008Assignee: Nippon Shokubai Co., Ltd.Inventors: Tsutomu Yuasa, Tomotaka Nishikawa, Noboru Sakamoto, Tsuyoshi Hirata, Hiroko Izukashi, Tomiyasu Ueta, Hiromichi Tanaka, Yoshiyuki Onda, Toru Uno
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Patent number: 7402644Abstract: The present invention provides: a production process for an alkylene oxide addition product, by which a high-molecular alkylene oxide addition product can be obtained with ordinary production facilities while the formation of by-products is suppressed; and production processes for derivatives from the alkylene oxide addition product.Type: GrantFiled: May 2, 2003Date of Patent: July 22, 2008Assignee: Nippon Shikubai Co., Ltd.Inventors: Toru Inaoka, Yoshiyuki Onda, Hiromichi Tanaka, Tsuyoshi Hirata
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Publication number: 20080103270Abstract: A core/shell type polyamine dendrimer compound comprising core regions formed of a dendrimer compound and shell regions formed by the reaction of at least one amine compound. A method for the production of the compound is also disclosed.Type: ApplicationFiled: October 2, 2003Publication date: May 1, 2008Inventors: Isao Sato, Toru Inaoka, Seiichi Suzuki, Hayato Itagaki, Yoshiyuki Onda
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Patent number: 7304104Abstract: The cement admixture of the present invention can provide viscosity decreasing ability as well as a high dispersing ability and slump loss preventing ability even in a high water reducing ratio range. The above-mentioned cement admixture comprises three components of a copolymer (A) containing a constituent unit (I) derived from the unsaturated (poly)alkylene glycol ether monomer (a) and a constituent unit (II) derived from a maleic acid monomer (b), a specific unsaturated (poly)alkylene glycol ether monomer (a) and a non-polymerizable (poly)alkylene glycol (B) having no alkenyl group.Type: GrantFiled: March 4, 2004Date of Patent: December 4, 2007Assignee: Nippon Shokubai Co. Ltd.Inventors: Akihiko Yamashita, Hiromichi Tanaka, Toru Uno, Yoshiyuki Onda, Tsuyoshi Hirata
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Patent number: 7253220Abstract: The cement admixture of the present invention can improve the workability by displaying sufficient viscosity decreasing ability and initial dispersing ability even under a low temperature environment as well as high dispersing ability and dispersion retaining ability even in a high water reducing ratio range. The above-mentioned cement admixture comprises four components of a copolymer (A) containing a constituent unit (I) derived from the unsaturated (poly)alkylene glycol ether monomer (a) and a constituent unit (II) derived from a maleic acid monomer (b), a specific unsaturated (poly)alkylene glycol ether monomer (a), a non-polymerizable (poly)alkylene glycol (B) having no alkenyl group, and a polymer (C) having an oxyalkylene group or a polyoxyalkylene group and a carboxyl group, which is different from the copolymer (A).Type: GrantFiled: March 4, 2004Date of Patent: August 7, 2007Assignee: Nippon Shokubai Co., Ltd.Inventors: Akihiko Yamashita, Hiromichi Tanaka, Toru Uno, Yoshiyuki Onda, Tsuyoshi Hirata
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Publication number: 20070039254Abstract: A soccer ball type room structure capable of being easily transported and constructed and capable of forming a living space for communing with nature, comprising a plurality of regular hexagonal first panels and a plurality of regular pentagonal second panels having the sides of the same length as those of the first panels which are connected with each other to form the living space inside.Type: ApplicationFiled: September 11, 2003Publication date: February 22, 2007Inventor: Yoshiyuki Onda
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Patent number: 7125944Abstract: It is an object of the present invention to provide a cement admixture capable of exhibiting high cement dispersing ability at low addition levels, in particular capable of displaying excellent initial dispersing ability and dispersion retaining ability even in a high water reducing ratio range, and a cement composition in which this admixture is used.Type: GrantFiled: May 28, 2002Date of Patent: October 24, 2006Assignee: Nippon Shokubai Co., Ltd.Inventors: Akihiko Yamashita, Hiromichi Tanaka, Tsuyoshi Hirata, Toru Uno, Yoshiyuki Onda
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Patent number: 7049462Abstract: It is an object of the present invention to provide a production method of a dehydration reaction product by which the occurrence of troubles in the production step or the degradation in performance characteristics or quality of various chemical products can be suppressed to a satisfactory extent. A production method of a dehydration reaction product which comprises a dehydration reaction step of subjecting a reaction solution containing a polymerizable compound to the dehydration reaction, said dehydration reaction step comprising using a dehydration reaction apparatus, said dehydration reaction apparatus comprising a reaction vessel, a condenser and a connecting pipe joining said reaction vessel with said condenser and satisfying the requirement: 0.05<(B3/A)<35 where A is a capacity (m3) of said reaction vessel and B is a total length (m) of said connecting pipe on the horizontal basis.Type: GrantFiled: November 27, 2001Date of Patent: May 23, 2006Assignee: Nippon Shokubai Co., Ltd.Inventors: Koichiro Nagare, Toru Uno, Yoshiyuki Onda, Tsutomu Yuasa, Masato Nishiue, Hisamoto Kawano
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Patent number: 6911494Abstract: It is an object of the present invention to provide a cement admixture which can show not only a high dispersing ability and a slump loss preventing effect but also a viscosity reducing effect and can show these characteristics even in the high water reduction ratio range, and a cement composition in which this admixture is used.Type: GrantFiled: September 25, 2002Date of Patent: June 28, 2005Assignee: Nippon Shokubai Co., Ltd.Inventors: Akihiko Yamashita, Hiromichi Tanaka, Tsuyoshi Hirata, Toru Uno, Yoshiyuki Onda
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Publication number: 20050131110Abstract: It is an object of the present invention to provide a polycarboxylic acid polpolymer which improves the water reducing capacity and workability of cement compositions and the like and making them easier to handle when the fluidity and water reducing capacity are at the same levels, a method of producing the copolymer, and a cement additive and a cement composition comprising the copolymer. The present invention is further to provide a polycarboxylic acid copolymer and a cement additive which are capable of improving the strength and durability of hardening products of cement compositions, hence can advantageously be used in ultrahigh strength concrete. The present invention is polycarboxylic acid copolymers having high water reducing capacity, reducing the viscosity of cement compositions and improving the workability in applying cement.Type: ApplicationFiled: August 19, 2004Publication date: June 16, 2005Applicant: Nippon Shokubai Co., Ltd.Inventors: Tsutomu Yuasa, Tomotaka Nishikawa, Noboru Sakamoto, Tsuyoshi Hirata, Hiroko Izukashi, Tomiyasu Ueta, Hiromichi Tanaka, Yoshiyuki Onda, Toru Uno
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Publication number: 20050080298Abstract: The present invention provides: a production process for an alkylene oxide addition product, by which a high-molecular alkylene oxide addition product can be obtained with ordinary production facilities while the formation of by-products is suppressed; and production processes for derivatives from the alkylene oxide addition product.Type: ApplicationFiled: May 2, 2003Publication date: April 14, 2005Applicant: Nippon Shokubai Co., Ltd.Inventors: Toru Inaoka, Yoshiyuki Onda, Hiromichi Tanaka, Tsuyoshi Hirata
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Patent number: 6864337Abstract: It is an object of the present invention to provide a polycarboxylic acid copolymer which improves the water reducing capacity and workability of cement compositions and the like and making them easier to handle when the fluidity and water reducing capacity are at the same levels, a method of producing the copolymer, and a cement additive and a cement composition comprising the copolymer. The present invention is further to provide a polycarboxylic acid copolymer and a cement additive which are capable of improving the strength and durability of hardening products of cement compositions, hence can advantageously be used in ultrahigh strength concrete. The present invention is still further to provide a method of producing polycarboxylic acid copolymers having high water reducing capacity, reducing the viscosity of cement compositions and improving the workability in applying cement.Type: GrantFiled: December 26, 2001Date of Patent: March 8, 2005Assignee: Nippon Shokubai Co., Ltd.Inventors: Tsutomu Yuasa, Tomotaka Nishikawa, Noboru Sakamoto, Tsuyoshi Hirata, Hiroko Izukashi, Tomiyasu Ueta, Hiromichi Tanaka, Yoshiyuki Onda, Toru Uno
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Publication number: 20040260011Abstract: It is an object of the present invention, which has been made in view of the above-mentioned state of the art, to provide a cement admixture capable of improving the water-reducing ability of cement compositions and the like and enhancing the strength and durability of hardened products produced therefrom and further capable of adjusting the viscosity of such compositions so as to facilitate the works at the sites of handling the same, as well as a method of producing such cement additive.Type: ApplicationFiled: February 10, 2004Publication date: December 23, 2004Inventors: Tsutomu Yuasa, Hiromichi Tanaka, Noboru Sakamoto, Tomotaka Nishikawa, Hiroko Izukashi, Toru Uno, Tsuyoshi Hirata, Tomiyasu Ueta, Yoshiyuki Onda
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Patent number: 6825289Abstract: The present invention is to provide a production method of chemical reactive substances with stable quality by which solidification, gel formation, and the resulting blockade within material injection nozzles are prevented, and contamination of a reaction system with the gelled matter is prevented, as well as occurrence of problems on a production process due to the gelled matter is suppressed, when the chemical reactive substances are produced by injecting the liquid materials containing reactive substances having unsaturated double bonds into the reaction vessel through the material injection nozzles of the reaction vessel. The present invention is a production method of a chemical reactive substance which comprises injecting a liquid material containing a reactive substance having an unsaturated double bond into a reaction vessel through a material injection nozzle of said reaction vessel and causing a reaction at a reaction temperature of not less than 50° C.Type: GrantFiled: March 21, 2003Date of Patent: November 30, 2004Assignee: Nippon Shokubai Co., Ltd.Inventors: Masaya Yamamoto, Toru Uno, Yoshiyuki Onda, Koichiro Nagare, Minoru Miyagawa
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Publication number: 20040204517Abstract: The cement admixture of the present invention can improve the workability by displaying sufficient viscosity decreasing ability and initial dispersing ability even under a low temperature environment as well as high dispersing ability and dispersion retaining ability even in a high water reducing ratio range. The above-mentioned cement admixture comprises four components of a copolymer (A) containing a constituent unit (I) derived from the unsaturated (poly)alkylene glycol ether monomer (a) and a constituent unit (II) derived from a maleic acid monomer (b), a specific unsaturated (poly)alkylene glycol ether monomer (a), a non-polymerizable (poly)alkylene glycol (B) having no alkenyl group, and a polymer (C) having an oxyalkylene group or a polyoxyalkylene group and a carboxyl group, which is different from the copolymer (A).Type: ApplicationFiled: March 4, 2004Publication date: October 14, 2004Applicant: Nippon Shokubai Co., Ltd.Inventors: Akihiko Yamashita, Hiromichi Tanaka, Toru Uno, Yoshiyuki Onda, Tsuyoshi Hirata
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Publication number: 20040198871Abstract: The cement admixture of the present invention can provide viscosity decreasing ability as well as a high dispersing ability and slump loss preventing ability even in a high water reducing ratio range. The above-mentioned cement admixture comprises three components of a copolymer (A) containing a constituent unit (I) derived from the unsaturated (poly)alkylene glycol ether monomer (a) and a constituent unit (II) derived from a maleic acid monomer (b), a specific unsaturated (poly)alkylene glycol ether monomer (a) and a non-polymerizable (poly)alkylene glycol (B) having no alkenyl group.Type: ApplicationFiled: March 4, 2004Publication date: October 7, 2004Applicant: Nippon Shokubai Co., Ltd.Inventors: Akihiko Yamashita, Hiromichi Tanaka, Toru Uno, Yoshiyuki Onda, Tsuyoshi Hirata
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Patent number: 6762325Abstract: When the reaction solution formed during the addition of an alkylene oxide to an active hydrogen-containing compound has viscosity of not less than 10 mPa·s, this invention provides a method for stirring the reaction solution by the rotation of a vane or vanes continuously disposed in the vertical direction within an agitating reaction vessel in such a manner that the numerical value C represented by the following formula (1): C=A/(h2−h1) (1) (wherein A denotes the length (m) of the vane or the vanes newly immersed by the supply of alkylene oxide, h1 denotes the height (m) of the liquid level before the supply of alkylene oxide, and h2 denotes the height (m) of the liquid level after the supply of alkylene oxide) may be not less than 0.5. By employing the method of this invention, it is made possible to effect addition of an alkylene oxide to the active hydrogen-containing compound with high efficiency.Type: GrantFiled: May 13, 2002Date of Patent: July 13, 2004Assignee: Nippon Shokubai Co., Ltd.Inventors: Toru Inaoka, Yasuhiko Sato, Yoshiyuki Onda, Hiromichi Tanaka, Tsuyoshi Hirata
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Patent number: 6727315Abstract: The present invention provides: a copolymer for cement admixtures which displays high dispersibility with a small adding amount and excellent dispersibility particularly even in a high water reducing ratio area, a cement admixture utilizing the copolymer, and a cement composition, and further, a production process for the copolymer. The copolymer for cement admixtures comprises: constitutional unit (I) derived from unsaturated polyalkylene glycol ether monomer (a) having an alkenyl group having 5 carbon atoms and an oxyalkylene group having 2 to 18 carbon atoms with an average addition number of moles of the oxyalkylene groups to be in the range of 10 to 300; and constitutional unit (II) derived from unsaturated monocarboxylic acid monomer (b). The cement admixture includes the copolymer for cement admixtures as an essential component, and may further include a defoaming agent. The cement composition includes the copolymer for cement admixtures, and cement as essential components.Type: GrantFiled: June 1, 2002Date of Patent: April 27, 2004Inventors: Masaya Yamamoto, Toru Uno, Yoshiyuki Onda, Hiromichi Tanaka, Akihiko Yamashita, Tsuyoshi Hirata, Naoko Hirano
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Publication number: 20030199616Abstract: It is an object of the present invention to provide a cement admixture capable of exhibiting high cement dispersing ability at low addition levels, in particular capable of displaying excellent initial dispersing ability and dispersion retaining ability even in a high water reducing ratio range, and a cement composition in which this admixture is used.Type: ApplicationFiled: April 4, 2003Publication date: October 23, 2003Inventors: Akihiko Yamashita, Hiromichi Tanaka, Tsuyoshi Hirata, Toru Uno, Yoshiyuki Onda