Patents Assigned to Fuso Chemical Co., Ltd.
-
Patent number: 11691885Abstract: Provided is a hydrophobic silica powder that can be obtained by the sol-gel process, and that is excellent in charge properties. The hydrophobic silica powder has a hydrophobicity of 50% or more, a saturated water content of 4% or less, and a nitrogen content of 0.05% or more.Type: GrantFiled: September 5, 2018Date of Patent: July 4, 2023Assignee: FUSO CHEMICAL CO., LTD.Inventors: Kazui Omokawa, Hirokazu Yokota, Kenichi Takeuchi, Yuma Negishi, Tomoko Kiseki, Munenori Komoto
-
Publication number: 20220228001Abstract: The problem to be solved by the present invention is to provide colloidal silica for metal polishing that is capable of achieving a high polishing rate. This problem can be achieved by a colloidal silica for metal polishing, comprising a silica particle having a surface on which a functional group having at least one carboxyl group is immobilized by covalent bonding.Type: ApplicationFiled: April 14, 2020Publication date: July 21, 2022Applicant: FUSO CHEMICAL CO., LTD.Inventors: Daisuke Sugiyama, Chiharu Nakano
-
Publication number: 20220177318Abstract: The present invention provides colloidal silica that exhibits excellent abrasiveness and contains, with high purity, deformed silica particles with excellent compactness and a large amount of alkoxy groups per unit area; the invention also provides a method for producing the colloidal silica in a simple manner with reduced costs. The invention provides colloidal silica containing silica particles having a bent structure and/or a branched structure, wherein the silica particles have a particle density of 1.95 or more, the silica particles have a ratio (m/n) of the content of alkoxy groups m (ppa) to the average primary particle size n (nm) of 200 or more, and the silica particles having a bent structure and/or a branched structure are present in an amount of 15% or more based on the number of particles in a given field of view as observed with a scanning electron microscope at 200,000-times magnification.Type: ApplicationFiled: February 26, 2020Publication date: June 9, 2022Applicant: FUSO CHEMICAL CO., LTD.Inventors: Hideki Otsuki, Yoshiki Michiwaki, Yuma Negishi, Toshiki Chiba
-
Publication number: 20220144649Abstract: A colloidal silica is disclosed that contains, with high purity, silica particles having an appropriate particle density, a high aggregation ratio, and a high alkoxy group content, and to provide a method for producing the colloidal silica in a simple manner at reduced costs. The colloidal silica containing silica particles is disclosed, wherein the silica particles have an average primary particle size of 33 nm or more, an aggregation ratio of 1.2 or more, and a particle density of 1.95 or more, the silica particles contain 1000 ppm by mass or more of alkoxy groups per gram of the silica particles, the proportion of the number of silica particles having an equivalent circle diameter under 20 nm is less than 15%, and the silica particles contain a primary amine in an amount of 5 ?mol or more per gram of the silica particles.Type: ApplicationFiled: February 26, 2020Publication date: May 12, 2022Applicant: FUSO CHEMICAL CO., LTD.Inventors: Yuma Negishi, Hideki Otsuki, Hiroaki Yamashita, Toshiki Chiba
-
Publication number: 20220144650Abstract: The present invention provides colloidal silica containing silica particles excellent in compactness and excellent in maintenance of the bumpy surface under basic conditions, and provides a method for producing the colloidal silica. The present invention provides colloidal silica containing silica particles having a bumpy surface, wherein (1) the silica particles have a content of alkoxy groups of 1000 ppm or more, and (2) the silica particles have a reduction in specific surface area of 15.0% or less when the silica particles are heated under basic conditions.Type: ApplicationFiled: February 26, 2020Publication date: May 12, 2022Applicant: FUSO CHEMICAL CO., LTD.Inventors: Yuka Fujimura, Yoshiki Michiwaki
-
Publication number: 20220127150Abstract: Colloidal silica containing silica particles that have a small particle size (e.g., an average primary particle size of 20 nm or less) and that contain alkoxy groups, and a method for producing the colloidal silica, are disclosed. The colloidal silica containing silica particles can have a small particle size and exhibit a suppressed increase in the average secondary particle size after storage. The colloidal silica containing silica particles wherein the silica particles have an average primary particle size of 20 nm or less, the silica particles have a ratio (m/n) of the content of alkoxy groups m (ppm) to the average primary particle size n (nm) of 300 or more, the silica particles have a particle density of 1.95 or more, and the silica particles have an increase rate of average secondary particle size of 12% or less in a storage stability test.Type: ApplicationFiled: February 26, 2020Publication date: April 28, 2022Applicant: FUSO CHEMICAL CO., LTD.Inventors: Hiroaki Yamashita, Yuma Shibuichi, Yuka Fujimura
-
Publication number: 20220128914Abstract: The present invention provides a hydrophobic silica powder having a small particle size, a narrow particle size distribution, and a high hydrophobicity, and containing a very small amount of organic acid, and toner resin particles having the hydrophobic silica powder on the surface thereof. A hydrophobic silica powder having a particle size (D50) as measured by a laser diffraction method of 300 nm or less, a particle size distribution index (D90/D10) of 3.0 or less, a hydrophobicity of 60% by volume or more, and an organic acid content of 1 to 300 ppm.Type: ApplicationFiled: February 26, 2020Publication date: April 28, 2022Applicant: FUSO CHEMICAL CO., LTD.Inventors: Kazui Omokawa, Yuma Negishi, Yasuhiro Fuma
-
METAL OXIDE PARTICLES SURFACE MODIFIED WITH QUATERNARY AMMONIUM GROUP, AND METHOD FOR PRODUCING SAME
Publication number: 20220009784Abstract: An object of the present invention is to provide a metal oxide particle having a surface modified with a quaternary ammonium group, and a method for producing the particle. The present invention relates to a metal oxide particle having a surface modified with a silyl group and having an aggregation ratio (average particle size measured by dynamic light scattering/average diameter of primary particles measured in an SEM image) of 5.Type: ApplicationFiled: November 28, 2019Publication date: January 13, 2022Applicant: FUSO CHEMICAL CO., LTD.Inventor: Tomoko Shimizu -
Publication number: 20210061667Abstract: Provided is a hydrophobic silica powder that can be obtained by the sol-gel process, and that is excellent in charge properties. The hydrophobic silica powder has a hydrophobicity of 50% or more, a saturated water content of 4% or less, and a nitrogen content of 0.05% or more.Type: ApplicationFiled: September 5, 2018Publication date: March 4, 2021Applicant: FUSO CHEMICAL CO., LTD.Inventors: Kazui Omokawa, Hirokazu Yokota, Kenichi Takeuchi, Yuma Negishi, Tomoko Kiseki, Munenori Komoto
-
Patent number: 10834923Abstract: This disclosure provides an agent for improving plant growth, the agent significantly improving resistances to a wide variety of stress possibly subjected to a plant, such as resistances to chemical stress and ultraviolet ray stress as well as resistances to temperature stress and dry stress, the agent having a high safety. This agent for improving plant growth alleviates an environmental stress on a plant, promotes plant growth, or a plant quality. This agent for improving plant growth contains, as its main ingredient, zerumbone, an analog of zerumbone, or a salt of zerumbone or the analog. Furthermore, in this agent for improving plant growth, the analog of zerumbone is ?-humulene or ?-caryophyllene.Type: GrantFiled: January 17, 2019Date of Patent: November 17, 2020Assignee: FUSO CHEMICAL CO., LTD.Inventors: Hiroyuki Kishimoto, Shigetoyo Matsumura, Takaya Nishinokawa, Mari Kado, Akinori Hoshino
-
Publication number: 20200348611Abstract: A hydrophobic silica powder is disclosed that exhibits reduced desorption of a charge control agent, on the charge-controllable surface, and that is capable of imparting charge properties within a suitable range to toner resin particles to which the hydrophobic silica particles are externally added. A hydrophobic silica powder is characterized in that (1) the hydrophobic silica powder has a hydrophobicity of 50% or more; (2) an amount X is 0.1 mass % or more, the amount X being an amount of at least one compound selected from the group consisting of a quaternary ammonium ion, a mono-azo complex, and a mineral acid ion extracted with a mixture solvent of methanol and a ethanesulfonic acid aqueous solution: and (3) the amount X and an amount Y satisfy the following formula (I): Y/X<0.15??(I), the amount Y being an amount of the at least one compound extracted with water.Type: ApplicationFiled: September 21, 2018Publication date: November 5, 2020Applicant: FUSO CHEMICAL CO., LTD.Inventors: Hirokazu Yokota, Munenori Komoto, Kenichi Takeuchi
-
Patent number: 9550683Abstract: The present invention provides dense silica particles with reduced metal impurities. Specifically, the present invention provides a colloidal silica produced by using an alkyl silicate as a starting material, wherein, with respect to a sample prepared by adding, as an internal standard, 1 wt. % of polydimethylsilane to a dried product of the colloidal silica, a peak area value calculated using a formula of a colloidal silica peak area/a polydimethylsilane peak area is 15 or less, the peak areas being determined by an obtained solid-state 29Si-CP/MAS-NMR spectrum. The present invention further provides a method for producing the colloidal silica.Type: GrantFiled: March 27, 2008Date of Patent: January 24, 2017Assignee: Fuso Chemical Co., Ltd.Inventor: Kazuaki Higuchi
-
Patent number: 8529787Abstract: This invention provides a dense, high-purity colloidal silica containing silica secondary particles having a branched and/or bent structure, and a production method thereof. Specifically, this invention provides a method for producing a colloidal silica, comprising the steps of 1) preparing a mother liquid containing an alkali catalyst and water, and having a pH of 9 to 12; and 2) adding a hydrolysis liquid obtained by hydrolysis of an alkyl silicate to the mother liquid, wherein the step of adding the hydrolysis liquid to the mother liquid sequentially comprises A) step 1 of adding the hydrolysis liquid until the pH of the resulting liquid mixture becomes less than 7; B) step 2 of adding an aqueous alkali solution until the pH of the liquid mixture becomes 7 or more; and C) step 3 of adding the hydrolysis liquid while maintaining the pH of the liquid mixture at 7 or more, and a colloidal silica containing silica secondary particles having a branched and/or bent structure, obtained by this method.Type: GrantFiled: September 1, 2009Date of Patent: September 10, 2013Assignee: Fuso Chemical Co., Ltd.Inventors: Kazuaki Higuchi, Hideki Otsuki
-
Patent number: 8053479Abstract: This invention provides a high-purity, high-concentrated silica sol with long-term stability and low viscosity by preventing viscosity-increase after production, and method for producing the same. In one embodiment, the silica sol produced by an alkoxide method comprises at least a dispersing agent and silica, wherein the concentration of said dispersing agent is 10-3000 ppm with respect to the silica, wherein said dispersing agent may be an inorganic acid, inorganic acid salt, organic acid or organic acid salt whose degradation temperature and boiling point are both 60° C. or higher, wherein said silica sol has a silica concentration of 20% weight or higher.Type: GrantFiled: July 25, 2007Date of Patent: November 8, 2011Assignee: Fuso Chemical Co. Ltd.Inventors: Norio Masuda, Shinsuke Ota
-
Publication number: 20110163262Abstract: This invention provides a dense, high-purity colloidal silica containing silica secondary particles having a branched and/or bent structure, and a production method thereof. Specifically, this invention provides a method for producing a colloidal silica, comprising the steps of 1) preparing a mother liquid containing an alkali catalyst and water, and having a pH of 9 to 12; and 2) adding a hydrolysis liquid obtained by hydrolysis of an alkyl silicate to the mother liquid, wherein the step of adding the hydrolysis liquid to the mother liquid sequentially comprises A) step 1 of adding the hydrolysis liquid until the pH of the resulting liquid mixture becomes less than 7; B) step 2 of adding an aqueous alkali solution until the pH of the liquid mixture becomes 7 or more; and C) step 3 of adding the hydrolysis liquid while maintaining the pH of the liquid mixture at 7 or more, and a colloidal silica containing silica secondary particles having a branched and/or bent structure, obtained by this method.Type: ApplicationFiled: September 1, 2009Publication date: July 7, 2011Applicant: FUSO CHEMICAL CO., LTD.Inventors: Kazuaki Higuchi, Hideki Otsuki
-
Publication number: 20100071272Abstract: The present invention provides dense silica particles with reduced metal impurities. Specifically, the present invention provides a colloidal silica produced by using an alkyl silicate as a starting material, wherein, with respect to a sample prepared by adding, as an internal standard, 1 wt. % of polydimethylsilane to a dried product of the colloidal silica, a peak area value calculated using a formula of a colloidal silica peak area/a polydimethylsilane peak area is 15 or less, the peak areas being determined by an obtained solid-state 29Si-CP/MAS-NMR spectrum. The present invention further provides a method for producing the colloidal silica.Type: ApplicationFiled: March 27, 2008Publication date: March 25, 2010Applicant: FUSO CHEMICAL CO, LTD.Inventor: Kazuaki Higuchi
-
Publication number: 20090143490Abstract: (Problem) This invention provides a high-purity, high-concentrated silica sol with long-term stability and low viscosity by preventing viscosity-increase after production, and method for producing the same. This invention provides the high-purity and high-concentrated silica sol that does not undergo a viscosity-increase or gelation in spite of any particle size differences of silica. This is obtained by adding a dispersing agent at a specific concentration to the reaction solution or solvent substitution-concentrated solution in the production process. (Means to Solve Problems) A silica sol produced by an alkoxide method, wherein said silica sol comprises at least a dispersing agent and silica, wherein said dispersing agent concentration is 10-3000 ppm with respect to the silica, wherein said dispersing agent consists of one or more compounds selected from inorganic acid, inorganic acid salt, organic acid and organic acid salt whose degradation temperature and boiling point are both 60° C.Type: ApplicationFiled: July 25, 2007Publication date: June 4, 2009Applicant: FUSO CHEMICAL CO., LTD.Inventors: Norio Masuda, Shinsuke Ota
-
Patent number: 7186544Abstract: Agents for promoting fattening of animals which contain as the active ingredient(s) at least one member selected from among acids originating in hexoses, non-toxic salts thereof and intramolecular esterification products thereof; and a method of promoting fattening by using these agents.Type: GrantFiled: February 3, 2004Date of Patent: March 6, 2007Assignee: Fuso Chemical Co., Ltd.Inventors: Hironari Koyama, Masaaki Okada
-
Publication number: 20060128795Abstract: Agents for promoting fattening of animals which contain as the active ingredient(s) at least one member selected from among acids originating in hexoses, non-toxic salts thereof and intramolecular esterification products thereof; and a method of promoting fattening by using these agents.Type: ApplicationFiled: January 30, 2006Publication date: June 15, 2006Applicant: FUSO CHEMICAL CO., LTD.Inventors: Hironari Koyama, Masaaki Okada
-
Patent number: 4590260Abstract: Copoly(amino acids) are produced by heating a mixture of at least one amino acid with at least one of ammonium malate, ammonium maleate or ammonium fumarate, or ammonium salts of malic, maleic or fumaric acid monoamide, or malic, maleic or fumaric acid monoamide or diamide, and hydrolyzing the reaction mixture under neutral or alkaline condition. The method is simple and easy to handle, and therefore, it is suitable for industrial applications.Type: GrantFiled: March 8, 1985Date of Patent: May 20, 1986Assignees: Fuso Chemical Co., Ltd., Kaoru HaradaInventors: Kaoru Harada, Akira Shimoyama