Patents by Inventor Muneo Kudo

Muneo Kudo 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).

  • Publication number: 20080268362
    Abstract: Hydrophobic spherical silica microparticles are provided. The microparticles are obtained by subjecting hydrophilic spherical silica microparticles obtained by subjecting a tetrafunctional silane compound and/or a partial hydrolysis-condensation product thereof to hydrolysis and condensation, to a two stage hydrophobic treatment introducing R1SiO3/2 units wherein R1 is a monovalent hydrocarbon group and then introducing R23SiO1/2 units wherein R2 represents monovalent hydrocarbon groups. The hydrophobic spherical silica microparticles have basic flowability energy of not more than 500 mJ, and a particle size within a range from 0.005 to 0.09 ?m. The silica microparticles have excellent flowability and dispersibility, and minimal aggregability, and are useful as a toner external additive.
    Type: Application
    Filed: April 24, 2008
    Publication date: October 30, 2008
    Applicant: Shin-Etsu Chemical Co., Ltd.
    Inventor: Muneo KUDO
  • Patent number: 7226982
    Abstract: A coating composition primarily comprising a disilane compound of the formula (A): XmR13?mSi—Y—SiR13?mXm??(A) wherein R1 is a monovalent hydrocarbon group, Y is a divalent fluorinated organo group, X is a hydrolyzable group, and m is 1, 2 or 3, or a (partial) hydrolyzate thereof is applied and cured to form a protective coat having excellent chemical resistance and antireflection.
    Type: Grant
    Filed: April 15, 2004
    Date of Patent: June 5, 2007
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Masaaki Yamaya, Kazuharu Sato, Muneo Kudo
  • Patent number: 7144628
    Abstract: Spherical silica-titania-based fine particles surface-treated with silane are provided. The fine particles have a titanium atom content of 0.001 to 5% by weight, a frictional electrification with iron powder of ?100 to ?300 ?C/g, a bulk density of 0.2 to 0.4 g/ml, and a particle diameter of 0.01 to 5 ?m. The particles are useful as a material for an external additive for an electrostatically charged image developing toner. The toner is unlikely to cause degeneration or scratching of organic photoreceptors, displays excellent dispersibility and favorable flowability and consequently does not cause adhesion to the photoreceptor.
    Type: Grant
    Filed: April 22, 2004
    Date of Patent: December 5, 2006
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Muneo Kudo, Masaaki Yamaya
  • Publication number: 20060240268
    Abstract: A coating composition primarily comprising a disilane compound of the formula (A): XmR13-mSi—Y—SiR13-mXm??(A) wherein R1 is a monovalent hydrocarbon group, Y is a divalent fluorinated organo group, X is a hydrolyzable group, and m is 1, 2 or 3, or a (partial) hydrolyzate thereof is applied and cured to form a protective coat having excellent chemical resistance and antireflection.
    Type: Application
    Filed: June 19, 2006
    Publication date: October 26, 2006
    Inventors: Masaaki Yamaya, Kazuharu Sato, Muneo Kudo
  • Patent number: 7083888
    Abstract: An external additive for electrostatically charged image developing toner is provided. The additive includes spherical hydrophobic fine silica particles having primary particles with a particle diameter of from 0.01 to 5 ?m and having been treated with a compound selected from the group consisting of a quaternary ammonium salt compound, a fluoroalkyl-group- or fluoroalkenyl-group- containing betaine compound and a silicone oil. The fine silica particles fulfill conditions (i) and (ii), as described in the disclosure. The external additive does not react or has no interaction with an organic photoreceptor and therefore change in quality does not occur or the photoreceptor is not scraped. Furthermore, it has a good flowability and therefore adhesion of a toner to the photoreceptor does not occur.
    Type: Grant
    Filed: September 6, 2001
    Date of Patent: August 1, 2006
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Muneo Kudo, Masaki Tanaka
  • Patent number: 6855759
    Abstract: Fine silica particles surface-treated with a silane and having primary particles having a particle diameter of from 0.01 to 5 ?m, which fine silica particles fulfill the following conditions (i) and (ii), a process for their production and an organic resin composition containing such particles as a component are provided. (i) When an organic compound which is liquid at room temperature and has a dielectric constant of from 1 to 40 F/m and fine silica particles are mixed in a weight ratio of 5:1 and shaked, the fine silica particles disperse uniformly in the organic compound, and (ii) the quantity of primary particles remaining as primary particles when methanol is evaporated under heating by means of an evaporator from a dispersion prepared by dispersing the fine silica particles in methanol and thereafter the particles are held at a temperature of 100° C. for 2 hours, is in a percentage of at least 20% based on the quantity of primary particles originally present.
    Type: Grant
    Filed: October 31, 2002
    Date of Patent: February 15, 2005
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Muneo Kudo, Shoji Ichinohe, Atsushi Asami, Mitsuo Asai, Kazuyuki Matsumura, Masaki Tanaka
  • Patent number: 6855768
    Abstract: A coating composition comprising the reaction product of a benzotriazole compound having a polymerizable vinyl group and a hydroxyl group with a silane compound and/or a (partial) hydrolyzate thereof is applied to plastic substrates, typically polycarbonate resin substrates to form transparent coatings having improved mar, weather and chemical resistance.
    Type: Grant
    Filed: October 28, 2003
    Date of Patent: February 15, 2005
    Assignees: Shin-Etsu Chemical Co., Ltd., Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
    Inventors: Kazuyuki Matsumura, Masaaki Yamaya, Koichi Higuchi, Muneo Kudo, Yoshifumi Kato, Takashi Komori, Toshihisa Shimo
  • Publication number: 20040229040
    Abstract: Spherical silica-titania-based fine particles surface-treated with silane are provided. The fine particles have a titanium atom content of 0.001 to 5% by weight, a frictional electrification with iron powder of −100 to −300 &mgr;C/g, a bulk density of 0.2 to 0.4 g/ml, and a particle diameter of 0.01 to 5 &mgr;m. The particles are useful as a material for an external additive for an electrostatically charged image developing toner. The toner is unlikely to cause degeneration or scratching of organic photoreceptors, displays excellent dispersibility and favorable flowability and consequently does not cause adhesion to the photoreceptor.
    Type: Application
    Filed: April 22, 2004
    Publication date: November 18, 2004
    Inventors: Muneo Kudo, Masaaki Yamaya
  • Publication number: 20040209084
    Abstract: A coating composition primarily comprising a disilane compound of the formula (A):
    Type: Application
    Filed: April 15, 2004
    Publication date: October 21, 2004
    Inventors: Masaaki Yamaya, Kazuharu Sato, Muneo Kudo
  • Publication number: 20040087711
    Abstract: A coating composition comprising the reaction product of a benzotriazole compound having a polymerizable vinyl group and a hydroxyl group with a silane compound and/or a (partial) hydrolyzate thereof is applied to plastic substrates, typically polycarbonate resin substrates to form transparent coatings having improved mar, weather and chemical resistance.
    Type: Application
    Filed: October 28, 2003
    Publication date: May 6, 2004
    Applicants: Shin-Etsu Chemical Co., Ltd., K.K. Toyoda Jidoshokki Seisa Kusho
    Inventors: Kazuyuki Matsumura, Masaaki Yamaya, Koichi Higuchi, Muneo Kudo, Yoshifumi Kato, Takashi Komori, Toshihisa Shimo
  • Patent number: 6699956
    Abstract: A highly dielectric addition type curable composition is provided comprising (A) an organopolysiloxane containing a cyanoalkyl group and a monovalent hydrocarbon group having an aliphatic unsaturated bond, (B) an organohydrogenpolysiloxane containing a cyanoalkyl group, and (C) a platinum group metal catalyst. The composition is easy to handle because of liquid despite solvent-free, less hygroscopic and effectively curable, and has a film-forming ability. The cured composition has excellent dielectric properties as demonstrated by a large dielectric constant and a low dielectric loss.
    Type: Grant
    Filed: March 14, 2002
    Date of Patent: March 2, 2004
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Muneo Kudo, Masaaki Yamaya
  • Patent number: 6677047
    Abstract: A coating composition comprising the reaction product of a benzotriazole compound having a polymerizable vinyl group and a hydroxyl group with a silane compound and/or a (partial) hydrolyzate thereof is applied to plastic substrates, typically polycarbonate resin substrates to form transparent coatings having improved mar, weather and chemical resistance.
    Type: Grant
    Filed: February 2, 2001
    Date of Patent: January 13, 2004
    Assignees: Shin-Etsu Chemical Co., Ltd., Kabushiki Kaisha Toyoda Jidoshokki SeisaKusho
    Inventors: Kazuyuki Matsumura, Masaaki Yamaya, Koichi Higuchi, Muneo Kudo, Yoshifumi Kato, Takashi Komori, Toshihisa Shimo
  • Patent number: 6656598
    Abstract: An aqueous coating composition including (A) an amino group-containing organopolysiloxane, (B) water and (C) at least one of a surface-active agent represented by the general formula (I): wherein R1 to R4are a C1-C8 alkyl group, R5 and R6 are a C1-C6 alkylene group, R7 and R8 are selected from a hydrogen atom, a C1-C6 alkyl group and a C2-C6 acyl group, and m and n are an integer of 0 to 40, provided that m and n are not 0 at the same time and that of m+n ranges from 1 to 40 on the average; and a nonionic surface-active agent containing a perfluoroalkyl group and an alkylene oxide group. In the composition, (C) is present in a content of 0.01% to 5% by weight based on the total of (A), (B) and (C), and an alcohol is present in an amount not more than 10% by weight of the composition. The aqueous coating composition has superior uniform-coating properties and storage stability.
    Type: Grant
    Filed: October 11, 2001
    Date of Patent: December 2, 2003
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Muneo Kudo, Masaaki Yamaya
  • Publication number: 20030134950
    Abstract: Fine silica particles surface-treated with a silane and having primary particles having a particle diameter of from 0.01 to 5 &mgr;m, which fine silica particles fulfill the following conditions (i) and (ii), a process for their production and an organic resin composition containing such particles as a component are provided. (i) When an organic compound which is liquid at room temperature and has a dielectric constant of from 1 to 40 F/m and fine silica particles are mixed in a weight ratio of 5:1 and shaked, the fine silica particles disperse uniformly in the organic compound, and (ii) the quantity of primary particles remaining as primary particles when methanol is evaporated under heating by means of an evaporator from a dispersion prepared by dispersing the fine silica particles in methanol and thereafter the particles are held at a temperature of 100° C. for 2 hours, is in a percentage of at least 20% based on the quantity of primary particles originally present.
    Type: Application
    Filed: October 31, 2002
    Publication date: July 17, 2003
    Applicant: Shin-Etsu Chemical Co., Ltd.
    Inventors: Muneo Kudo, Shoji Ichinohe, Atsushi Asami, Mitsuo Asai, Kazuyuki Matsumura, Masaki Tanaka
  • Patent number: 6521290
    Abstract: Fine silica particles surface-treated with a silane and having primary particles having a particle diameter of from 0.01 to 5 &mgr;m, which fine silica particles fulfill the following conditions (i) and (ii), a process for their production and an organic resin composition containing such particles as a component are provided. (i) When an organic compound which is liquid at room temperature and has a dielectric constant of from 1 to 40 F/m and fine silica particles are mixed in a weight ratio of 5:1 and shaked, the fine silica particles disperse uniformly in the organic compound, and (ii) the quantity of primary particles remaining as primary particles when methanol is evaporated under heating by means of an evaporator from a dispersion prepared by dispersing the fine silica particles in methanol and thereafter the particles are held at a temperature of 100° C. for 2 hours, is in a percentage of at least 20% based on the quantity of primary particles originally present.
    Type: Grant
    Filed: May 17, 1999
    Date of Patent: February 18, 2003
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Muneo Kudo, Shoji Ichinohe, Atsushi Asami, Mitsuo Asai, Kazuyuki Matsumura, Masaki Tanaka
  • Publication number: 20020198319
    Abstract: A highly dielectric addition type curable composition is provided comprising (A) an organopolysiloxane containing a cyanoalkyl group and a monovalent hydrocarbon group having an aliphatic unsaturated bond, (B) an organohydrogenpolysiloxane containing a cyanoalkyl group, and (C) a platinum group metal catalyst. The composition is easy to handle because of liquid despite solvent-free, less hygroscopic and effectively curable, and has a film-forming ability. The cured composition has excellent dielectric properties as demonstrated by a large dielectric constant and a low dielectric loss.
    Type: Application
    Filed: March 14, 2002
    Publication date: December 26, 2002
    Inventors: Muneo Kudo, Masaaki Yamaya
  • Patent number: 6497964
    Abstract: A composition comprising (1) 0.1-50 parts by weight of the reaction product of a hydroxyl group-containing benzophenone compound with a silane and/or a hydrolyzate thereof and (2) 100 parts by weight of a silane compound and/or a hydrolyzate thereof is applied to a polycarbonate sheet to form a protective coating having mar and weather resistance. A composition comprising the reaction product of a hydroxyl group-containing benzophenone compound with a silane and/or a hydrolyzate thereof is useful for undercoating.
    Type: Grant
    Filed: July 21, 2000
    Date of Patent: December 24, 2002
    Assignees: Shin-Etsu Chemical Co., Ltd., Kabushi Kaishi Toyoda Jidoshokki Seisakusho
    Inventors: Kazuyuki Matsumura, Masaaki Yamaya, Kazuharu Sato, Koichi Higuchi, Muneo Kudo
  • Publication number: 20020072581
    Abstract: An aqueous coating composition including (A) an amino group-containing organopolysiloxane, (B) water and (C) at least one of a surface-active agent represented by the general formula (I): 1
    Type: Application
    Filed: October 11, 2001
    Publication date: June 13, 2002
    Applicant: Shin-Etsu Chemical Co., Ltd.
    Inventors: Muneo Kudo, Masaaki Yamaya
  • Publication number: 20020055051
    Abstract: An external additive for electrostatically charged image developing toner is provided. The additive includes spherical hydrophobic fine silica particles having primary particles with a particle diameter of from 0.01 to 5 &mgr;m and having been treated with a compound selected from the group consisting of a quaternary ammonium salt compound, a fluoroalkyl-group-containing betaine compound and a silicone oil.
    Type: Application
    Filed: September 6, 2001
    Publication date: May 9, 2002
    Applicant: Shin-Etsu Chemical Co., Ltd
    Inventors: Muneo Kudo, Masaki Tanaka
  • Patent number: 6335037
    Abstract: A cosmetic containing spherical hydrophobic fine silica particles having an average particle diameter of from 0.01 to 5 &mgr;m, having been made more highly hydrophobic, is provided. The spherical hydrophobic fine silica particles have been made hydrophobic on their surfaces by introducing an R2SiO3/2 unit (wherein R2 represents a monovalent hydrocarbon group having 1 to 20 carbon atoms) to the surfaces of hydrophilic fine silica particles having an SiO2 unit, and further have been made more highly hydrophobic on their surfaces by introducing to the surfaces of the hydrophobic fine silica particles first treated an R13SiO1/2 unit (wherein R1's may be the same or different and each represent a monovalent hydrocarbon group having 1 to 6 carbon atoms). The cosmetic containing spherical hydrophobic fine silica particles is a product improved in spreadability and inunctionability.
    Type: Grant
    Filed: March 15, 2000
    Date of Patent: January 1, 2002
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Shoji Ichinohe, Muneo Kudo, Akira Yamamoto