Patents Assigned to Kawamura Institute of Chemical Research
  • Patent number: 9474835
    Abstract: 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: Grant
    Filed: August 10, 2012
    Date of Patent: October 25, 2016
    Assignees: Kawamura Institute of Chemical Research, DIC Corporation
    Inventors: Kazutoshi Haraguchi, Kazuomi Kubota, Tooru Takehisa, Tetsuo Takada, Noriko Santou
  • Patent number: 9382401
    Abstract: 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: Grant
    Filed: June 19, 2013
    Date of Patent: July 5, 2016
    Assignees: DIC Corporation, Kawamura Institute of Chemical Research
    Inventors: Kazutoshi Haraguchi, Katsuhito Kuroki
  • Publication number: 20140343209
    Abstract: 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: Application
    Filed: June 19, 2013
    Publication date: November 20, 2014
    Applicants: KAWAMURA INSTITUTE OF CHEMICAL RESEARCH, DIC Corporation
    Inventors: Kazutoshi Haraguchi, Katsuhito Kuroki
  • Publication number: 20140235748
    Abstract: 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: Application
    Filed: August 10, 2012
    Publication date: August 21, 2014
    Applicants: DIC CORPORATION, KAWAMURA INSTITUTE OF CHEMICAL RESEARCH
    Inventors: Kazutoshi Haraguchi, Kazuomi Kubota, Tooru Takehisa, Tetsuo Takada, Noriko Santou
  • Patent number: 8618232
    Abstract: 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: Grant
    Filed: March 31, 2011
    Date of Patent: December 31, 2013
    Assignees: DIC Corporation, Kawamura Institute of Chemical Research
    Inventors: Ren-Hua Jin, Pei-Xin Zhu
  • Patent number: 8530564
    Abstract: 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: Grant
    Filed: May 25, 2009
    Date of Patent: September 10, 2013
    Assignees: Kawamura Institute of Chemical Research, DIC Corporation
    Inventors: Tetsuo Takada, Kazutoshi Haraguchi
  • Patent number: 8486494
    Abstract: 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: Grant
    Filed: March 6, 2008
    Date of Patent: July 16, 2013
    Assignees: Kawamura Institute of Chemical Research, DIC Corporation
    Inventors: Norimasa Fukazawa, Ren-Hua Jin
  • Publication number: 20130040129
    Abstract: 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: Application
    Filed: March 31, 2011
    Publication date: February 14, 2013
    Applicants: KAWAMURA INSTITUTE OF CHEMICAL RESEARCH, DIC CORPORATION
    Inventors: Ren-Hua Jin, Pei-Xin Zhu
  • Publication number: 20120235094
    Abstract: 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: Application
    Filed: November 29, 2010
    Publication date: September 20, 2012
    Applicants: DIC Corporation, Kawamura Institute of Chemical Research
    Inventors: Pei-Xin Zhu, Ren-Hua Jin
  • Patent number: 8257662
    Abstract: 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: Grant
    Filed: September 1, 2008
    Date of Patent: September 4, 2012
    Assignees: Kawamura Institute of Chemical Research, DIC Corporation
    Inventors: Ren-Hua Jin, Jian-Jun Yuan
  • Publication number: 20120161090
    Abstract: 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: Application
    Filed: May 24, 2010
    Publication date: June 28, 2012
    Applicants: KAWAMURA INSTITUTE OF CHEMICAL RESEARCH, DIC CORPORATION
    Inventors: Pei-Xin Zhu, Ren-Hua Jin
  • Patent number: 8097657
    Abstract: 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: Grant
    Filed: August 3, 2009
    Date of Patent: January 17, 2012
    Assignees: DIC Corporation, Kawamura Institute of Chemical Research
    Inventors: Shinji Kato, Shin Ogasawara
  • Patent number: 8017542
    Abstract: 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: Grant
    Filed: December 10, 2007
    Date of Patent: September 13, 2011
    Assignees: Kawamura Institute of Chemical Research, DIC Corporation
    Inventors: Ren-Hua Jin, Pei-Xin Zhu, Norimasa Fukazawa
  • Patent number: 8017234
    Abstract: 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: Grant
    Filed: May 25, 2009
    Date of Patent: September 13, 2011
    Assignees: DIC Corporation, Kawamura Institute of Chemical Research
    Inventors: Ren-Hua Jin, Jian-Jun Yuan
  • Publication number: 20110207842
    Abstract: 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: Application
    Filed: August 3, 2009
    Publication date: August 25, 2011
    Applicants: DIC Corporation, Kawamura Institute of Chemical Research
    Inventors: Shinji Kato, Shin Ogasawara
  • Publication number: 20110195181
    Abstract: 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: Application
    Filed: July 27, 2009
    Publication date: August 11, 2011
    Applicants: DIC Corporation, Kawamura Institute of Chemical Research
    Inventors: Ren-Hua Jin, Jian-Jun Yuan
  • Patent number: 7993892
    Abstract: 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: Grant
    Filed: December 13, 2005
    Date of Patent: August 9, 2011
    Assignee: Kawamura Institute of Chemical Research
    Inventors: Tetsuo Takada, Kazutoshi Haraguchi, Tooru Takehisa
  • Publication number: 20110097802
    Abstract: 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: Application
    Filed: May 25, 2009
    Publication date: April 28, 2011
    Applicants: Kawamura Institute of Chemical Research, DIC Corporation
    Inventors: Tetsuo Takada, Kazutoshi Haraguchi
  • Publication number: 20110020648
    Abstract: 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: Application
    Filed: March 29, 2007
    Publication date: January 27, 2011
    Applicants: KAWAMURA INSTITUTE OF CHEMICAL RESEARCH, DIC CORPORATION
    Inventors: Norimasa Fukazawa, Ren-Hua Jin
  • Publication number: 20100215555
    Abstract: 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: Application
    Filed: September 1, 2008
    Publication date: August 26, 2010
    Applicants: KAWAMURA INSTITUTE OF CHEMICAL RESEARCH, DIC CORPORATION
    Inventors: Ren-Hua Jin, Jian Jun Yuan