Patents by Inventor Tomiyasu Ueta
Tomiyasu Ueta 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: 8058328Abstract: A cement admixture object of the present invention can make slump-retaining ability excellent to retain fluidity and, at the same time, can realize a viscosity of cement compositions so that work becomes easy at a field handling them, can make the state of a cement composition better. The present invention relates to a cement admixture which comprises a polycarboxylic acid copolymer having a polyalkylene glycol side chain, said polycarboxylic acid copolymer being constituted of two or more species of copolymers with different acid values, and at least one of said two or more species of copolymers with different acid values having an oxyalkylene group containing 3 or more carbon atoms.Type: GrantFiled: November 4, 2004Date of Patent: November 15, 2011Assignee: Nippon Shokubai Co., Ltd.Inventors: Tomiyasu Ueta, Hiroshi Yamazaki, Hiromichi Tanaka
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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: 7638563Abstract: The polycarboxylic acid concrete admixture of the present invention exhibits properties such as decreasing the concrete viscosity, improving the slump-retaining ability, and suppressing bleeding water, and is improved in the ability to cement compositions or the like. The above-mentioned polycarboxylic acid concrete admixture comprises a polycarboxylic acid polymer containing a polyalkylene glycol in the side chain, wherein the polycarboxylic acid polymer is obtained by polymerizing monomer components containing an alkyl (meth)acrylate monomer and a specific polyalkylene glycol unsaturated monomer and unsaturated carboxylic acid (salt) monomer, and it has a specific weight average molecular weight.Type: GrantFiled: May 7, 2004Date of Patent: December 29, 2009Assignee: Nippon Shokubai Co., Ltd.Inventors: Tomotaka Nishikawa, Toru Uno, Hirokazu Yamamoto, Yukiko Nishikawa, Hiromichi Tanaka, Tomiyasu Ueta
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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: 7368488Abstract: The cement admixture and the cement admixture composite of the present invention can improve the water-reducing ability of cement compositions and the like and enhance the strength and durability of hardening products produced therefrom and further can adjust the viscosity of such compositions so as to facilitate the works at the sites of handling the same. The above-mentioned cement admixture is a cement admixture comprising a polycarboxylic acid polymer containing a specific site, and the above-mentioned cement admixture composite comprises two or more species of cement admixtures, wherein at least one of them is said cement admixture.Type: GrantFiled: May 7, 2004Date of Patent: May 6, 2008Assignee: Nippon Shokubai Co., Ltd.Inventors: Tomotaka Nishikawa, Tomiyasu Ueta, Hiromichi Tanaka, Minoru Miyagawa, Shogo Iwai
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Publication number: 20080027177Abstract: The polycarboxylic acid concrete admixture of the present invention exhibits properties such as decreasing the concrete viscosity, improving the slump-retaining ability, and suppressing bleeding water, and is improved in the ability to cement compositions or the like. The above-mentioned polycarboxylic acid concrete admixture comprises a polycarboxylic acid polymer containing a polyalkylene glycol in the side chain, wherein the polycarboxylic acid polymer is obtained by polymerizing monomer components containing an alkyl (meth)acrylate monomer and a specific polyalkylene glycol unsaturated monomer and unsaturated carboxylic acid (salt) monomer, and it has a specific weight average molecular weight.Type: ApplicationFiled: May 7, 2004Publication date: January 31, 2008Applicant: NIPPON SHOKUBAI CO., LTD.Inventors: Tomotaka Nishikawa, Toru Uno, Hirokazu Yamamoto, Yukiko Nishikawa, Hiromichi Tanaka, Tomiyasu Ueta
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Patent number: 7321006Abstract: There are provided an admixture for cement which enhances water reducing property and flowability of a cement composition, and is excellent in slump retaining performance to retain the flowability with time, a polycarboxylic acid-based polymer for an admixture for cement suitable therefor, a producing method thereof, and a cement composition. One admixture for cement of the present invention contains copolymers (A) and (B) as an essential component, weight average molecular weights (AMw and BMw) of copolymers (A) and (B) are AMw>BMw, or peaktop molecular weights (AMp and BMp) of copolymers (A) and (B) are AMp>BMp. Another admixture for cement of the present invention contains a polycarboxylic acid-based polymer having a lower molecular weight side area ratio P of 50 to 87%.Type: GrantFiled: December 31, 2004Date of Patent: January 22, 2008Assignee: Nippon Shokubai Co., Ltd.Inventors: Toshio Hayashiya, Tomiyasu Ueta, Tsutomu Yuasa, Tsuyoshi Hirata, Hiroshi Yamazaki
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Publication number: 20070173568Abstract: The cement admixture and the cement admixture composite of the present invention can improve the water-reducing ability of cement compositions and the like and enhance the strength and durability of hardening products produced therefrom and further can adjust the viscosity of such compositions so as to facilitate the works at the sites of handling the same. The above-mentioned cement admixture is a cement admixture comprising a polycarboxylic acid polymer containing a specific site, and the above-mentioned cement admixture composite comprises two or more species of cement admixtures, wherein at least one of them is said cement admixture.Type: ApplicationFiled: May 7, 2004Publication date: July 26, 2007Applicant: Nippon Shokubai Co., Ltd.Inventors: Tomotaka Nishikawa, Tomiyasu Ueta, Shogo Iwai, Hiromichi Tanaka, Minoru Miyagawa
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Publication number: 20070142505Abstract: A cement admixture object of the present invention can make slump-retaining ability excellent to retain fluidity and, at the same time, can realize a viscosity of cement compositions so that work becomes easy at a field handling them, can make the state of a cement composition better. The present invention relates to a cement admixture which comprises a polycarboxylic acid copolymer having a polyalkylene glycol side chain, said polycarboxylic acid copolymer being constituted of two or more species of copolymers with different acid values, and at least one of said two or more species of copolymers with different acid values having an oxyalkylene group containing 3 or more carbon atoms.Type: ApplicationFiled: November 4, 2004Publication date: June 21, 2007Applicant: Nippon Shokubai Co., Ltd.Inventors: Tomiyasu Ueta, Hiroshi Yamazaki, Hiromichi Tanaka
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Publication number: 20070095256Abstract: To provide a cement admixture which makes it possible to: enhance slump maintaining capability; maintain fluidity; and provide a cement composition and the like having an appropriate viscosity for handling at the place where the composition and the like is handled. A cement admixture comprising an alkylene oxide adduct comprising a compound having 3 or more active hydrogens and an oxyalkylene group added to the compound, wherein an average molar number of addition of the oxyalkylene group relative to 1 mole of the active hydrogen is 100 mole or more.Type: ApplicationFiled: October 13, 2006Publication date: May 3, 2007Applicant: Nippon Shokubai Co., Ltd.Inventors: Minoru Miyagawa, Tomiyasu Ueta
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Publication number: 20050182162Abstract: There are provided a cement admixture which enhances water reducing property and flowability of a cement composition, and is excellent in slump retaining performance to retain the flowability with time, a polycarboxylic acid-based polymer for a cement admixture suitable therefor, a producing method thereof, and a cement composition. One cement admixture of the present invention contains copolymers (A) and (B) as an essential component, weight average molecular weights (AMw and BMw) of copolymers (A) and (B) are AMw>BMw, or peaktop molecular weights (AMp and BMp) of copolymers (A) and (B) are AMp>BMp. Another cement admixture of the present invention contains a polycarboxylic acid-based polymer having a lower molecular weight side area ratio P of 50 to 87%.Type: ApplicationFiled: December 31, 2004Publication date: August 18, 2005Inventors: Toshio Hayashiya, Tomiyasu Ueta, Tsutomu Yuasa, Tsuyoshi Hirata, Hiroshi Yamazaki
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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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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: 6498231Abstract: The present invention provides: a vinylpyrrolidone polymer which exhibits good heat resistance and storage stability; a composition containing the vinylpyrrolidone polymer; a stabilization process for the vinylpyrrolidone polymer, and a preservation process for a vinylpyrrolidone polymer by which: even when the vinylpyrrolidone polymer is preserved for a long time or at high temperature, the physical properties such as molecular weight (K value) of the vinylpyrrolidone polymer can be prevented from changing, therefore the vinylpyrrolidone polymer can stably be preserved. To enhance the heat resistance and the storage stability, a vinylpyrrolidone polymer is mixed with a certain amount of antioxidant, and the oxygen concentration is suppressed to not higher than 50,000 ppm in a gas phase that contacts with the vinylpyrrolidone polymer when preserving.Type: GrantFiled: December 3, 2001Date of Patent: December 24, 2002Assignee: Nippon Shokubai Co., Ltd.Inventors: Daijo Tomihisa, Toshiaki Kuriyama, Tomiyasu Ueta, Akio Naka, Hideyuki Nishibayashi, Yoshitomo Nakata
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Publication number: 20020193547Abstract: 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: ApplicationFiled: December 26, 2001Publication date: December 19, 2002Inventors: Tsutomu Yuasa, Tomotaka Nishikawa, Noboru Sakamoto, Tsuyoshi Hirata, Hiroko Izukashi, Tomiyasu Ueta, Hiromichi Tanaka, Yoshiyuki Onda, Toru Uno
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Publication number: 20020058782Abstract: The present invention provides: a vinylpyrrolidone polymer which exhibits good heat resistance and storage stability; a composition containing the vinylpyrrolidone polymer; a stabilization process for the vinylpyrrolidone polymer, and a preservation process for a vinylpyrrolidone polymer by which: even when the vinylpyrrolidone polymer is preserved for a long time or at high temperature, the physical properties such as molecular weight (K value) of the vinylpyrrolidone polymer can be prevented from changing, therefore the vinylpyrrolidone polymer can stably be preserved. To enhance the heat resistance and the storage stability, a vinylpyrrolidone polymer is mixed with a certain amount of antioxidant, and the oxygen concentration is suppressed to not higher than 50,000 ppm in a gas phase that contacts with the vinylpyrrolidone polymer when preserving.Type: ApplicationFiled: December 3, 2001Publication date: May 16, 2002Inventors: Daijo Tomihisa, Toshiaki Kuriyama, Tomiyasu Ueta, Akio Naka, Hideyuki Nishibayashi, Yoshitomo Nakata
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Patent number: 6346600Abstract: The present invention provides: a vinylpyrrolidone polymer which exhibits good heat resistance and storage stability; a composition containing the vinylpyrrolidone polymer; a stabilization process for the vinylpyrrolidone polymer, and a preservation process for a vinylpyrrolidone polymer by which: even when the vinylpyrrolidone polymer is preserved for a long time or at high temperature, the physical properties such as molecular weight (K value) of the vinylpyrrolidone polymer can be prevented from changing, therefore the vinylpyrrolidone polymer can stably be preserved. To enhance the heat resistance and the storage stability, a vinylpyrrolidone polymer is mixed with a certain amount of antioxidant, and the oxygen concentration is suppressed to not higher than 50,000 ppm in a gas phase that contacts with the vinylpyrrolidone polymer when preserving.Type: GrantFiled: April 6, 2000Date of Patent: February 12, 2002Assignee: Nippon Shokubai Co., Ltd.Inventors: Daijo Tomihisa, Toshiaki Kuriyama, Tomiyasu Ueta, Akio Naka, Hideyuki Nishibayashi, Yoshitomo Nakata
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Patent number: 5929202Abstract: This invention concerns a method for the production of an ethylene sulfide/sulfur copolymer which comprises copolymerizing ethylene sulfide with sulfur. This method permits an ethylene sulfide/sulfur copolymer as a novel copolymer.Type: GrantFiled: May 14, 1997Date of Patent: July 27, 1999Assignees: Nippon Shokubai Co., Ltd., Elf Atochem S. A.Inventors: Yoshihiro Arita, Tomiyasu Ueta, Thierry Aubert