Patents Assigned to Kawamura Institute of Chemical Research
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Patent number: 9474835Abstract: The object of the present invention is achieved by providing a copolymer, in particular, a block copolymer which has excellent coating formation ability, adhesive properties to a substrate, and does not adsorb protein; an antithrombotic coating agent which has superior antithrombotic properties and adhesive properties to a substrate to those of the conventional antithrombotic coating agent; and a medical instrument which is obtained by coating the antithrombotic coating agent, and the block copolymer includes a polymer (A) containing a (meth)acrylic ester monomer and a polymer (B) containing a (meth)acrylamide monomer and has excellent coating formation ability and high adhesive properties to a substrate.Type: GrantFiled: August 10, 2012Date of Patent: October 25, 2016Assignees: Kawamura Institute of Chemical Research, DIC CorporationInventors: Kazutoshi Haraguchi, Kazuomi Kubota, Tooru Takehisa, Tetsuo Takada, Noriko Santou
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Patent number: 9382401Abstract: The problem to be solved is to provide a nondrying polymer hydrogel, which is not dried under atmospheric conditions and has excellent mechanical properties, and a method for producing the nondrying polymer hydrogel. A nondrying polymer hydrogel having both excellent nondrying properties and mechanical properties (e.g., excellent elongation properties, compression properties, and surface adhesiveness) can be produced by using a nondrying polymer hydrogel including a deliquescent substance in such a manner that the water vapor pressure shown by the polymer hydrogel is equal to or lower than the water vapor partial pressure in the atmosphere, in particular, by allowing a deliquescent substance to be contained at a high concentration in a polymer hydrogel having a network structure formed by a polymer of a water-soluble radically-polymerizable organic monomer having a specific chemical composition and a delaminated water-swellable clay mineral.Type: GrantFiled: June 19, 2013Date of Patent: July 5, 2016Assignees: DIC Corporation, Kawamura Institute of Chemical ResearchInventors: Kazutoshi Haraguchi, Katsuhito Kuroki
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Publication number: 20140343209Abstract: The problem to be solved is to provide a nondrying polymer hydrogel, which is not dried under atmospheric conditions and has excellent mechanical properties, and a method for producing the nondrying polymer hydrogel. A nondrying polymer hydrogel having both excellent nondrying properties and mechanical properties (e.g., excellent elongation properties, compression properties, and surface adhesiveness) can be produced by using a nondrying polymer hydrogel including a deliquescent substance in such a manner that the water vapor pressure shown by the polymer hydrogel is equal to or lower than the water vapor partial pressure in the atmosphere, in particular, by allowing a deliquescent substance to be contained at a high concentration in a polymer hydrogel having a network structure formed by a polymer of a water-soluble radically-polymerizable organic monomer having a specific chemical composition and a delaminated water-swellable clay mineral.Type: ApplicationFiled: June 19, 2013Publication date: November 20, 2014Applicants: KAWAMURA INSTITUTE OF CHEMICAL RESEARCH, DIC CorporationInventors: Kazutoshi Haraguchi, Katsuhito Kuroki
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Publication number: 20140235748Abstract: The object of the present invention is achieved by providing a copolymer, in particular, a block copolymer which has excellent coating formation ability, adhesive properties to a substrate, and does not adsorb protein; an antithrombotic coating agent which has superior antithrombotic properties and adhesive properties to a substrate to those of the conventional antithrombotic coating agent; and a medical instrument which is obtained by coating the antithrombotic coating agent, and the block copolymer includes a polymer (A) containing a (meth)acrylic ester monomer and a polymer (B) containing a (meth)acrylamide monomer and has excellent coating formation ability and high adhesive properties to a substrate.Type: ApplicationFiled: August 10, 2012Publication date: August 21, 2014Applicants: DIC CORPORATION, KAWAMURA INSTITUTE OF CHEMICAL RESEARCHInventors: Kazutoshi Haraguchi, Kazuomi Kubota, Tooru Takehisa, Tetsuo Takada, Noriko Santou
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Patent number: 8618232Abstract: There are provided an infrared absorbing thin film that efficiently absorbs infrared rays and has good versatility by controlling the absorption intensity of titanium oxide in an infrared region and a method for producing the infrared absorbing thin film. The infrared absorbing thin film containing a rutile-type titanium oxide crystal.Type: GrantFiled: March 31, 2011Date of Patent: December 31, 2013Assignees: DIC Corporation, Kawamura Institute of Chemical ResearchInventors: Ren-Hua Jin, Pei-Xin Zhu
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Patent number: 8530564Abstract: Disclosed are: an organic-inorganic complex dispersion improved in film formability and adhesion to a base material. The organic-inorganic complex dispersion comprises an aqueous medium and particles of a complex dispersed in the aqueous medium, wherein the complex has a three-dimensional network structure formed by a polymer of a monomer comprising a monomer represented by general formula (1) and at least one inorganic material selected from a water-swellable clay mineral and silica. Also disclosed is an antifogging material manufactured by using the organic-inorganic complex dispersion. Further disclosed is a cell culture substratum improved in the detachability of cells cultured on the substratum, which is manufactured by using the organic-inorganic complex dispersion. Still further disclosed are manufacturing methods for same.Type: GrantFiled: May 25, 2009Date of Patent: September 10, 2013Assignees: Kawamura Institute of Chemical Research, DIC CorporationInventors: Tetsuo Takada, Kazutoshi Haraguchi
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Patent number: 8486494Abstract: An organic/inorganic composite coating film comprising an inorganic material as a matrix and an organic material combined therewith. The coating film has a regular hollow structure therein, and the coating film surface has a rugged pattern with semispherical protrusions. Also provided is a large-area structural color film obtained by burning the composite coating film. The organic/inorganic composite coating film is obtained by applying an aqueous coating composition comprising a metal alkoxide, an aqueous dispersion of monodisperse polymer particles, and an acid catalyst to a substrate and curing the coating composition. Burning the organic/inorganic composite coating film gives the structural color film.Type: GrantFiled: March 6, 2008Date of Patent: July 16, 2013Assignees: Kawamura Institute of Chemical Research, DIC CorporationInventors: Norimasa Fukazawa, Ren-Hua Jin
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Publication number: 20130040129Abstract: There are provided an infrared absorbing thin film that efficiently absorbs infrared rays and has good versatility by controlling the absorption intensity of titanium oxide in an infrared region and a method for producing the infrared absorbing thin film. The infrared absorbing thin film containing a rutile-type titanium oxide crystal can be produced through a step of dispersing or dissolving a complex of an amino group-containing basic polymer and a transition metal ion in an aqueous medium; a step of obtaining a composite having a polymer/titania layered structure in which the complex of the amino group-containing basic polymer and the transition metal ion is sandwiched between layers of titania, by mixing the aqueous dispersion with a water-soluble titanium compound in the aqueous medium; a step of calcining the composite in an air atmosphere at a temperature of 650° C.Type: ApplicationFiled: March 31, 2011Publication date: February 14, 2013Applicants: KAWAMURA INSTITUTE OF CHEMICAL RESEARCH, DIC CORPORATIONInventors: Ren-Hua Jin, Pei-Xin Zhu
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Publication number: 20120235094Abstract: A silica nanofiber/metal oxide nanocrystal composite is produced by a method including associating a polymer having a linear polyethyleneimine skeleton in a water-based medium in the presence of ice, adding alkoxysilane to the water-based medium obtained in the above step to form a composite nanofiber including the associate and silica that covers the associate, while the fiber spontaneously forms a disc-shaped network structure, a step of depositing a metal oxide on a surface of the fiber by mixing the disc-shaped structure obtained in the above step with a hydrolyzable metal compound, and a step of calcining the disc-shaped. structure obtained in the step above to form a silica nanofiber through removal of the polymer in the fiber, to convert the metal oxide into a nanocrystal, and to bond the nanocrystal to the fiber. When zinc oxide is used as the metal oxide, the composite functions as a luminous body.Type: ApplicationFiled: November 29, 2010Publication date: September 20, 2012Applicants: DIC Corporation, Kawamura Institute of Chemical ResearchInventors: Pei-Xin Zhu, Ren-Hua Jin
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Patent number: 8257662Abstract: The present invention provides a structure in which the surface of a solid substrate of any shape is covered with metal oxide, in particular, a nanostructure composite in which polyethyleneimine, which is an organic substance, and metal oxide, which is an inorganic substance, are combined in nano-meter scale, spreads at the entire surface of a substrate, and the nanostructure composite forms a nano-boundary of complex shapes so as to thoroughly cover the entire surface of the substrate; a structure in which metal ions, metal nano-particles, organic pigment molecules are contained in the nanostructure composite; a process for producing these structures which can produce these structures with ease and efficiently; and an application method for the structures as an immobilized catalyst type reactor.Type: GrantFiled: September 1, 2008Date of Patent: September 4, 2012Assignees: Kawamura Institute of Chemical Research, DIC CorporationInventors: Ren-Hua Jin, Jian-Jun Yuan
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Publication number: 20120161090Abstract: A highly versatile material for mid-infrared filters is provided by precisely controlling the absorption intensity of titanium oxide in an infrared region. A rutile-type titanium oxide crystal is produced by a method including a step (I) of dispersing or dissolving a complex of an amino group-containing basic polymer and a transition metal ion in an aqueous medium, a step (II) of obtaining a composite having a polymer/titania layered structure in which the complex of the amino group-containing basic polymer and the transition metal ion is sandwiched between layers of titania, by causing a hydrolysis reaction between the aqueous dispersion or aqueous solution prepared in the step (I) and a water-soluble titanium compound in the aqueous medium, and a step (III) of calcining the composite having the layered structure in an air atmosphere at a temperature of 650° C.Type: ApplicationFiled: May 24, 2010Publication date: June 28, 2012Applicants: KAWAMURA INSTITUTE OF CHEMICAL RESEARCH, DIC CORPORATIONInventors: Pei-Xin Zhu, Ren-Hua Jin
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Patent number: 8097657Abstract: The present invention relates to organic polymer porous materials, and in particular, to an organic polymer porous material that functions as a reusable insoluble solid catalyst and a method for producing the same. The organic polymer porous material of the present invention is characteristic in that the amount of immobilized bases is high and the specific surface area is large. The object has been achieved by an organic polymer porous material including a polymer (PA) obtained by polymerizing a polymerizable composition (A) containing a compound (a) obtained by reacting a dendrimer (a1) having at least an amino group as a reactive functional group or a polyethyleneimine (a2) having at least an amino group as a reactive functional group with a compound (a3) having a vinyl group and a group that can react with the reactive functional group.Type: GrantFiled: August 3, 2009Date of Patent: January 17, 2012Assignees: DIC Corporation, Kawamura Institute of Chemical ResearchInventors: Shinji Kato, Shin Ogasawara
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Patent number: 8017542Abstract: The present invention provides a doped titanium oxide having visible light-responsiveness whose structure is specified, and a simple production method thereof. By burning with heat a layered structure composite laminated alternately with polymer and the titania, which is obtained using basic polymer having amino group(s) and water-soluble titanium compound, carbon atoms and nitrogen atoms in the polymer are, doped to the crystalline surface of titanium oxide. As making the polymer complex with metal ions beforehand, the metal ions can be also doped to the titanium oxide.Type: GrantFiled: December 10, 2007Date of Patent: September 13, 2011Assignees: Kawamura Institute of Chemical Research, DIC CorporationInventors: Ren-Hua Jin, Pei-Xin Zhu, Norimasa Fukazawa
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Patent number: 8017234Abstract: The present invention relates to a structural object coated with a superhydrophobic nanostructure composite, the structural object being obtained by densely coating a surface of a solid substrate having a desired shape with a nanostructure obtained by combining a polymer having a polyethyleneimine skeleton with silica on the nanometer order, and bonding a hydrophobic group to the surface of the nanostructure, and a process for producing the structural object. The present invention also relates to a structural object coated with a superhydrophobic nanostructure composite, the structural object being obtained by removing the polymer having the polyethyleneimine skeleton from the nanostructure and bonding a hydrophobic group to the surface of the residual nanostructure containing silica as a main constituent component, and a process for producing the structural object. Furthermore, the present invention provides a method of using the structural object as a container for transferring an aqueous solution.Type: GrantFiled: May 25, 2009Date of Patent: September 13, 2011Assignees: DIC Corporation, Kawamura Institute of Chemical ResearchInventors: Ren-Hua Jin, Jian-Jun Yuan
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Publication number: 20110207842Abstract: The present invention relates to organic polymer porous materials, and in particular, to an organic polymer porous material that functions as a reusable insoluble solid catalyst and a method for producing the same. The organic polymer porous material of the present invention is characteristic in that the amount of immobilized bases is high and the specific surface area is large. The object has been achieved by an organic polymer porous material including a polymer (PA) obtained by polymerizing a polymerizable composition (A) containing a compound (a) obtained by reacting a dendrimer (a1) having at least an amino group as a reactive functional group or a polyethyleneimine (a2) having at least an amino group as a reactive functional group with a compound (a3) having a vinyl group and a group that can react with the reactive functional group.Type: ApplicationFiled: August 3, 2009Publication date: August 25, 2011Applicants: DIC Corporation, Kawamura Institute of Chemical ResearchInventors: Shinji Kato, Shin Ogasawara
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SUPERHYDROPHOBIC POWDERS, STRUCTURE WITH SUPERHYDROPHOBIC SURFACE, AND PROCESSES FOR PRODUCING THESE
Publication number: 20110195181Abstract: A process for producing superhydrophobic powders comprising silica as the main component and the surface of the powders have a contact angle with water of 150° or larger; and a structure having a superhydrophobic surface comprising the powders. The process comprised: introducing hydrophobic groups into the silica present in the surface of aggregates of organic/inorganic composite nanofibers obtained by combining a polymer, which is an organic substance, with silica, which is an inorganic substance, on the order of nanometer or into the silica obtained by calcining the organic/inorganic composite nanofibers and removing the polymer there from; and thereby making powders composed of the aggregates superhydrophobic. Also provided is a superhydrophobic powders obtained by the process. The structure having a superhydrophobic surface is obtained by fixing the superhydrophobic powders to a surface of a solid substrate.Type: ApplicationFiled: July 27, 2009Publication date: August 11, 2011Applicants: DIC Corporation, Kawamura Institute of Chemical ResearchInventors: Ren-Hua Jin, Jian-Jun Yuan -
Patent number: 7993892Abstract: The present invention provides a production process of an organic/inorganic composite hydrogel, which demonstrates superior mechanical properties, by uniformly dispersing a clay mineral in an organic polymer over a wide range of clay mineral content, and a dried form thereof, to be produced easily in a short period of time. The production process of an organic/inorganic composite hydrogel of the present invention comprises reacting a water-soluble organic monomer (a) in the presence of a water-swellable clay mineral (b) by irradiating with an energy beam in a solution in which a non-water-soluble polymerization initiator (d) is dispersed in an aqueous medium (c).Type: GrantFiled: December 13, 2005Date of Patent: August 9, 2011Assignee: Kawamura Institute of Chemical ResearchInventors: Tetsuo Takada, Kazutoshi Haraguchi, Tooru Takehisa
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Publication number: 20110097802Abstract: Disclosed are: an organic-inorganic complex dispersion improved in film formability and adhesion to a base material. The organic-inorganic complex dispersion comprises an aqueous medium and particles of a complex dispersed in the aqueous medium, wherein the complex has a three-dimensional network structure formed by a polymer of a monomer comprising a monomer represented by general formula (1) and at least one inorganic material selected from a water-swellable clay mineral and silica. Also disclosed is an antifogging material manufactured by using the organic-inorganic complex dispersion. Further disclosed is a cell culture substratum improved in the detachability of cells cultured on the substratum, which is manufactured by using the organic-inorganic complex dispersion. Still further disclosed are manufacturing methods for same.Type: ApplicationFiled: May 25, 2009Publication date: April 28, 2011Applicants: Kawamura Institute of Chemical Research, DIC CorporationInventors: Tetsuo Takada, Kazutoshi Haraguchi
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Publication number: 20110020648Abstract: The hollow polymer particles of the present invention comprise a shell wall having for a main component thereof a copolymer obtained by polymerizing a monomer group (I) including a radical polymerizable water-soluble monomer (A) and a radical polymerizable water-insoluble monomer (B), and have a thickness of the shell wall of 5 to 80 nm. In addition, in the hollow polymer particle production process of the present invention, a monomer group (I) including a radical polymerizable water-soluble monomer (A) and a radical polymerizable water-insoluble monomer (B) is radical-polymerized using a polymerization initiator in an aqueous medium.Type: ApplicationFiled: March 29, 2007Publication date: January 27, 2011Applicants: KAWAMURA INSTITUTE OF CHEMICAL RESEARCH, DIC CORPORATIONInventors: Norimasa Fukazawa, Ren-Hua Jin
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Publication number: 20100215555Abstract: The present invention provides a structure in which the surface of a solid substrate of any shape is covered with metal oxide, in particular, a nanostructure composite in which polyethyleneimine, which is an organic substance, and metal oxide, which is an inorganic substance, are combined in nano-meter scale, spreads at the entire surface of a substrate, and the nanostructure composite forms a nano-boundary of complex shapes so as to thoroughly cover the entire surface of the substrate; a structure in which metal ions, metal nano-particles, organic pigment molecules are contained in the nanostructure composite; a process for producing these structures which can produce these structures with ease and efficiently; and an application method for the structures as an immobilized catalyst type reactor.Type: ApplicationFiled: September 1, 2008Publication date: August 26, 2010Applicants: KAWAMURA INSTITUTE OF CHEMICAL RESEARCH, DIC CORPORATIONInventors: Ren-Hua Jin, Jian Jun Yuan