Patents by Inventor Satoshi Idemura
Satoshi Idemura 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).
-
Patent number: 9150744Abstract: The present invention relates to an ink-jet recording ink which can simultaneously achieve long-term preservation stability, high luster, and light fastness of a printed image, and an aqueous pigment liquid dispersion to produce the ink. Moreover, the present invention relates to a production method of the aqueous pigment liquid dispersion. For the aforementioned objects, the applicant provides an aqueous pigment liquid dispersion, including: C. I. pigment green 36 (a); a styrene-acrylic acid type copolymer (b); a basic compound (c); and a wetting agent (d), wherein the styrene-acrylic acid type copolymer (b) has styrene-based monomer units of 60 mass % or more in the total of all the monomer units, an acid value of 120 to 240, and a weight average molecular weight of 6,000 to 40,000, and the mass ratio (b)/(a) is within a range from 0.15 to 0.25.Type: GrantFiled: June 26, 2007Date of Patent: October 6, 2015Assignee: DIC CorporationInventors: Satoshi Idemura, Kenji Sugo, Hiroshi Katsube, Masanori Fujimaki
-
Patent number: 8779027Abstract: A production method of an aqueous pigment dispersion liquid of the present invention includes: a kneading step of kneading a mixture including (a) C. I. pigment violet 23, (b) a styrene-acrylic acid-based copolymer with an acid value of 50 to 300 mgKOH/g, (c) an alkali metal hydroxide, (d) water, and (e) a wetting agent, thereby producing a colored, kneaded material; and a dispersion step of dispersing the pigmented, kneaded material in an aqueous medium by using a dispersing machine with media, wherein the mass ratio of (b)/(a) in the kneading step is within a range of 0.15 to 0.45, the mass ratio of (d)/(a) in the first half of the kneading step is within a range of 0.04 to 0.42, and the change in viscosity of materials to be dispersed in the dispersion step is 10% or lower.Type: GrantFiled: October 31, 2006Date of Patent: July 15, 2014Assignee: DIC CorporationInventors: Satoshi Idemura, Kenji Sugo, Tomoyuki Uezono
-
Patent number: 8349922Abstract: A yellow water-based pigment dispersion liquid is provided that includes pigment particles dispersed with a significantly small particle size, that has excellent dispersion stability, that causes less precipitation even at low viscosity, and that provides high gloss when the dispersion liquid is used as a main component of inkjet recording ink. In order to produce the water-based pigment dispersion liquid, it is important to add, as a kneading aid, an acetylene glycol surfactant having a specific structure and an HLB value of 8 to 12 to a mixture containing a bis-acetoacetallylide pigment, a styrene-acrylic acid copolymer having an acid value of 145 to 175, a basic compound, and a humectant and then to knead the resultant mixture to obtain a pigment dispersion. By dispersing the pigment dispersion in a water-based medium, a water-based pigment dispersion liquid for inkjet recording having the characteristics above can be produced.Type: GrantFiled: March 15, 2012Date of Patent: January 8, 2013Assignee: DIC CorporationInventors: Satoshi Idemura, Hiroshi Maru, Kenji Sugo
-
Publication number: 20120232199Abstract: A yellow water-based pigment dispersion liquid is provided that includes pigment particles dispersed with a significantly small particle size, that has excellent dispersion stability, that causes less precipitation even at low viscosity, and that provides high gloss when the dispersion liquid is used as a main component of inkjet recording ink. In order to produce the water-based pigment dispersion liquid, it is important to add, as a kneading aid, an acetylene glycol surfactant having a specific structure and an HLB value of 8 to 12 to a mixture containing a bis-acetoacetallylide pigment, a styrene-acrylic acid copolymer having an acid value of 145 to 175, a basic compound, and a humectant and then to knead the resultant mixture to obtain a pigment dispersion. By dispersing the pigment dispersion in a water-based medium, a water-based pigment dispersion liquid for inkjet recording having the characteristics above can be produced.Type: ApplicationFiled: March 15, 2012Publication date: September 13, 2012Applicant: DIC CORPORATIONInventors: Satoshi Idemura, Hiroshi Maru, Kenji Sugo
-
Patent number: 8044116Abstract: A pigment dispersion of the present invention includes a bisacetoacetarylide pigment (a); a styrene-acrylic acid-based copolymer (b); a basic compound (c); and a wetting agent (d), wherein the wetting agent (d) includes at least one diol compound (e), the diol compound (e) is selected from the group consisting of dipropylene glycol, 2-ethyl-1,3-hexanediol, and 1,2-hexanediol the mass ratio (e)/(a) of the diol compound (e) and the bisacetoacetarylide pigment (a) is within a range from 3/100 to 8/100.Type: GrantFiled: February 23, 2007Date of Patent: October 25, 2011Assignee: DIC CorporationInventors: Satoshi Idemura, Atsuo Kobayashi
-
Publication number: 20100227958Abstract: A pigment dispersion of the present invention includes a bisacetoacetarylide pigment (a); a styrene-acrylic acid-based copolymer (b); a basic compound (c); and a wetting agent (d), wherein the wetting agent (d) includes a diol compound (e), the diol compound (e) is a compound represented by a general formula (1) or a general formula (2), and A-B??(1) C—O-D??(2) the mass ratio (e)/(a) of the diol compound (e) and the bisacetoacetarylide pigment (a) is within a range from 3/100 to 15/100.Type: ApplicationFiled: February 23, 2007Publication date: September 9, 2010Applicant: DIC CORPORATIONInventors: Satoshi Idemura, Atsuo Kobayashi
-
Patent number: 7662878Abstract: The present invention is to provide an orange ink composition for inkjet recording high in color saturation and gloss, while having long storage stability and jet stability, and also to provide an aqueous pigment dispersion mainly composing the ink composition. The aqueous pigment dispersion which contains a styrene-acrylic acid copolymer containing 60% by mass or more of styrene-based monomer units with respect to total monomer components and having an acid value of 130 to 200 and a weight-average molecular weight of 6,000 to 40,000, an alkali metal hydroxide, a wetting agent and C. I. Pigment Red 168 is excellent in storage stability and high in gloss. Further, an ink composition for inkjet recording mainly composing the aqueous pigment dispersion reflects an excellent dispersibility of the aqueous pigment dispersion, thereby having a favorable jettability and excellent light fastness.Type: GrantFiled: January 30, 2006Date of Patent: February 16, 2010Assignee: Dainippon Ink and Chemicals, Inc.Inventors: Satoshi Idemura, Tomoyuki Uezono
-
Patent number: 7652088Abstract: An organic-inorganic composite material is disclosed wherein an inorganic compound is finely dispersed in an organic polymer matrix in nanometer order and the inorganic compound content is large. The organic-inorganic composite material has formability and flexibility of organic materials and features of various metal compounds (such as hardness, catalytic power, insulating property, semiconducting property, electronic conductivity, ionic conductivity, large specific surface area, high heat resistance, wear resistance, and dimensional stability to temperature changes or moisture absorption) at the same time.Type: GrantFiled: June 24, 2004Date of Patent: January 26, 2010Assignee: DIC CorporationInventors: Michiya Nakashima, Satoshi Idemura, Toshihiro Ebine
-
Publication number: 20090326127Abstract: The present invention relates to an ink-jet recording ink which can simultaneously achieve long-term preservation stability, high luster, and light fastness of a printed image, and an aqueous pigment liquid dispersion to produce the ink. Moreover, the present invention relates to a production method of the aqueous pigment liquid dispersion. For the aforementioned objects, the applicant provides an aqueous pigment liquid dispersion, including: C. I. pigment green 36 (a); a styrene-acrylic acid type copolymer (b); a basic compound (c); and a wetting agent (d), wherein the styrene-acrylic acid type copolymer (b) has styrene-based monomer units of 60 mass % or more in the total of all the monomer units, an acid value of 120 to 240, and a weight average molecular weight of 6,000 to 40,000, and the mass ratio (b)/(a) is within a range from 0.15 to 0.25.Type: ApplicationFiled: June 26, 2007Publication date: December 31, 2009Applicant: DIC CorporationInventors: Satoshi Idemura, Kenji Sugo, Hiroshi Katsube, Masanori Fujimaki
-
Publication number: 20090221733Abstract: A production method of an aqueous pigment dispersion liquid of the present invention includes: a kneading step of kneading a mixture including (a) C. I. pigment violet 23, (b) a styrene-acrylic acid-based copolymer with an acid value of 50 to 300 mgKOH/g, (c) an alkali metal hydroxide, (d) water, and (e) a wetting agent, thereby producing a colored, kneaded material; and a dispersion step of dispersing the pigmented, kneaded material in an aqueous medium by using a dispersing machine with media, wherein the mass ratio of (b)/(a) in the kneading step is within a range of 0.15 to 0.45, the mass ratio of (d)/(a) in the first half of the kneading step is within a range of 0.04 to 0.42, and the change in viscosity of materials to be dispersed in the dispersion step is 10% or lower.Type: ApplicationFiled: October 31, 2006Publication date: September 3, 2009Applicant: DAINIPPON INK AND CHEMICALS, INC.Inventors: Satoshi Idemura, Kenji Sugo, Tomoyuki Uezono
-
Publication number: 20090018245Abstract: The present invention is to provide an orange ink composition for inkjet recording high in color saturation and gloss, while having long storage stability and jet stability, and also to provide an aqueous pigment dispersion mainly composing the ink composition. The aqueous pigment dispersion which contains a styrene-acrylic acid copolymer containing 60% by mass or more of styrene-based monomer units with respect to total monomer components and having an acid value of 130 to 200 and a weight-average molecular weight of 6,000 to 40,000, an alkali metal hydroxide, a wetting agent and C. I. Pigment Red 168 is excellent in storage stability and high in gloss. Further, an ink composition for inkjet recording mainly composing the aqueous pigment dispersion reflects an excellent dispersibility of the aqueous pigment dispersion, thereby having a favorable jettability and excellent light fastness.Type: ApplicationFiled: January 30, 2006Publication date: January 15, 2009Applicant: DAINIPPON INK AND CHEMICALS, INC.Inventors: Satoshi Idemura, Tomoyuki Uezono
-
Publication number: 20070293615Abstract: An organic-inorganic composite material is disclosed wherein an inorganic compound is finely dispersed in an organic polymer matrix in nanometer order and the inorganic compound content is large. The organic-inorganic composite material has formability and flexibility of organic materials and features of various metal compounds (such as hardness, catalytic power, insulating property, semiconducting property, electronic conductivity, ionic conductivity, large specific surface area, high heat resistance, wear resistance, and dimensional stability to temperature changes or moisture absorption) at the same time.Type: ApplicationFiled: June 24, 2004Publication date: December 20, 2007Applicant: DAINIPPON INK AND CHEMICALS, INC.Inventors: Michiya Nakashima, Satoshi Idemura, Toshihiro Ebine
-
Patent number: 7141627Abstract: An epoxy resin cured article has a high glass transition temperature and low dissipation factor. An epoxy resin composition from which the cured article can be having excellent solubility in solvents is used to produce the cured articles. A polyester as a curing agent of an epoxy resin composition having an aromatic polyhydroxy coumpound residue including an aryloxycarbonyl group at the molecule of the terminal, an aromatic polyvalent hydrocarbon group residue, and bulky structure, is used. Since the curing agent behaves as a polyfunctional curing agent, a cured article produced therefrom has a high crosslink density. Since highly polar hydroxyl groups are not formed during curing, a cured article has high glass transition temperature and a low dissipation factor. The cured article does not release low molecular weight carboxylic acids though hydrolysis of ester bonds at crosslinked bonds.Type: GrantFiled: October 27, 2003Date of Patent: November 28, 2006Assignee: Dainippon Ink and Chemicals, Inc.Inventors: Satoshi Idemura, Masao Yamada, Koichi Fujimoto, Katsuji Takahashi
-
Patent number: 6752906Abstract: A loudspeaker in which the input resistance is improved and the effect of humidity on the playback frequency response is suppressed, and a method for the preparation of the loudspeaker. A sheet-like product, containing glass particles with a particle size of 8 nm to 300 nm and polyamide resin, and prepared by application of a paper-making technique, is used as the diaphragm. The content of the glass particles in the compound material is 5 weight % to 70 weight %. In preparing the diaphragm, a phase of an aqueous solution containing diamine and water glass is contacted with a phase of an organic solution containing a dicarboxylic acid halide to generate a compound material containing glass particles and the polyamide resin. The compound material so prepared is formed into a sheet by a paper-making technique. In the process of the preparation by the paper-making technique, the compound material mixed with other fibrous material may also be used as a starting material.Type: GrantFiled: February 14, 2003Date of Patent: June 22, 2004Assignees: Sony Corporation, Dainippon Ink and Chemicals, Inc.Inventors: Masaru Uryu, Kunihiko Tokura, Yoshio Ohashi, Satoshi Idemura, Michiya Nakashima, Katsuji Takahashi
-
Publication number: 20040110908Abstract: An epoxy resin cured article has a high glass transition temperature and low dissipation factor. An epoxy resin composition from which the cured article can be having excellent solubility in solvents is used to produce the cured articles. A polyester as a curing agent of an epoxy resin composition having an aromatic polyhydroxy coumpound residue including an aryloxycarbonyl group at the molecule of the terminal, an aromatic polyvalent hydrocarbon group residue, and bulky structure, is used. Since the curing agent behaves as a polyfunctional curing agent, a cured article produced therefrom has a high crosslink density. Since highly polar hydroxyl groups are not formed during curing, a cured article has high glass transition temperature and a low dissipation factor. The cured article does not release low molecular weight carboxylic acids though hydrolysis of ester bonds at crosslinked bonds.Type: ApplicationFiled: October 27, 2003Publication date: June 10, 2004Inventors: Satoshi Idemura, Masao Yamada, Koichi Fujimoto, Katsuji Takahashi
-
Publication number: 20030150572Abstract: A loudspeaker in which the input resistance is improved and the effect of humidity on the playback frequency response is suppressed, and a method for the preparation of the loudspeaker. A sheet-like product, containing glass particles with a particle size of 8 nm to 300 nm and polyamide resin, and prepared by application of a paper-making technique, is used as the diaphragm. The content of the glass particles in the compound material is 5 weight % to 70 weight %. In preparing the diaphragm, a phase of an aqueous solution containing diamine and water glass is contacted with a phase of an organic solution containing a dicarboxylic acid halide to generate a compound material containing glass particles and the polyamide resin. The compound material so prepared is formed into a sheet by a paper-making technique. In the process of the preparation by the paper-making technique, the compound material mixed with other fibrous material may also be used as a starting material.Type: ApplicationFiled: February 14, 2003Publication date: August 14, 2003Inventors: Masaru Uryu, Kunihiko Tokura, Yoshio Ohashi, Satoshi Idemura, Michiya Nakashima, Katsuji Takahashi
-
Patent number: 6554962Abstract: A loudspeaker in which the input resistance is improved and the effect of humidity on the playback frequency response is suppressed, and a method for the preparation of the loudspeaker. A sheet-like product, containing glass particles with a particle size of 8 nm to 300 nm and polyamide resin, and prepared by application of a paper-making technique, is used as the diaphragm. The content of the glass particles in the compound material is 5 weight % to 70 weight %. In preparing the diaphragm, a phase of an aqueous solution containing diamine and water glass is contacted with a phase of an organic solution containing a dicarboxylic acid halide to generate a compound material containing glass particles and the polyamide resin. The compound material so prepared is formed into a sheet by a paper-making technique. In the process of the preparation by the paper-making technique, the compound material mixed with other fibrous material may also be used as a starting material.Type: GrantFiled: April 13, 2001Date of Patent: April 29, 2003Assignees: Sony Corporation, Dai Nippon Ink and Chemicals, Inc.Inventors: Masaru Uryu, Kunihiko Tokura, Yoshio Ohashi, Satoshi Idemura, Michiya Nakashima, Katsuji Takahashi
-
Publication number: 20020096298Abstract: A loudspeaker in which the input resistance is improved and the effect of humidity on the playback frequency response is suppressed, and a method for the preparation of the loudspeaker. A sheet-like product, containing glass particles with a particle size of 8 nm to 300 nm and polyamide resin, and prepared by application of a paper-making technique, is used as the diaphragm. The content of the glass particles in the compound material is 5 weight % to 70 weight %. In preparing the diaphragm, a phase of an aqueous solution containing diamine and water glass is contacted with a phase of an organic solution containing a dicarboxylic acid halide to generate a compound material containing glass particles and the polyamide resin. The compound material so prepared is formed into a sheet by a paper-making technique. In the process of the preparation by the paper-making technique, the compound material mixed with other fibrous material may also be used as a starting material.Type: ApplicationFiled: April 13, 2001Publication date: July 25, 2002Inventors: Masaru Uryu, Kunihiko Tokura, Yoshio Ohashi, Satoshi Idemura, Michiya Nakashima, Katsuji Takahashi
-
Patent number: 6063862Abstract: Disclosed is a process for producing a glass-polyamide composite comprising bringing into contact or mixing (A) an aqueous solution containing water, water glass, and a diamine and (B) an organic solution containing an organic solvent and a dicarboxylic acid halide to carry out polyamide formation and polycondensation of water glass simultaneously.Type: GrantFiled: March 10, 1999Date of Patent: May 16, 2000Assignee: Dainippon Ink and Chemicals, Inc.Inventors: Satoshi Idemura, Kazutoshi Haraguchi
-
Patent number: 5637653Abstract: Polymer blend materials composed of an aromatic polyamide and flexible polyamide wherein the aromatic polyamide molecules are uniformly dispersed in a matrix of the flexible polyamide which are produced by first blending the flexible polyamide and monomer(s) for the aromatic polyamide in a solvent, then next polymerizing the monomer(s) in the presence of a phosphite compound, resulting in a transparent gel product capable of being fabricated into useful shaped articles without causing marked phase separation observed in polymer blend materials obtained by conventional coagulation method. The in situ formed aromatic polyamide is uniformly dispersed in the flexible polyamide matrix even in fabricated forms, giving improved transparency over the starting flexible polyamide and improved resistance toward chemicals such as acids, especially after heat treatment.Type: GrantFiled: May 2, 1995Date of Patent: June 10, 1997Assignees: Dainippon Ink and Chemicals, Incorporated, Research Triangle InstituteInventors: Jack Preston, Satoshi Idemura