Patents by Inventor Kotaro Kuwata

Kotaro Kuwata 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: 9469701
    Abstract: The present invention provides a polyolefin powder including a homopolymer of ethylene or a copolymer of ethylene and an ?-olefin having 3 to 15 carbon atoms.
    Type: Grant
    Filed: November 13, 2015
    Date of Patent: October 18, 2016
    Assignee: Asahi Kasei Chemicals Corporation
    Inventor: Kotaro Kuwata
  • Publication number: 20160137760
    Abstract: The present invention provides a polyolefin powder including a homopolymer of ethylene or a copolymer of ethylene and an ?-olefin having 3 to 15 carbon atoms.
    Type: Application
    Filed: November 13, 2015
    Publication date: May 19, 2016
    Applicant: Asahi Kasei Chemicals Corporation
    Inventor: Kotaro Kuwata
  • Publication number: 20120251728
    Abstract: An oil-repellent coating material composition containing: (A) an alkoxysilane, represented by the following general formula (1), having a hydrocarbon group to which at least one or more fluorine atoms are bonded; Rf[—X—Y—SiR1a(OR2)3?a]m ??(1) wherein Rf represents an alkyl group, an alkenyl group, or an aromatic hydrocarbon group, the group having at least one fluorine atom and 1 to 20 carbon atoms; X represents an oxygen atom or a divalent organic group containing an oxygen atom; Y represents a spacer group (CH(Z)—)n wherein Z is a substituent selected from a hydrogen atom, a halogen atom, or a hydrocarbon group having 1 to 3 carbon atoms, and n is of 2 to 8; R1 and R2 may be the same or different hydrocarbon group(s) having 1 to 10 carbon atoms; m is 1 or 2; and a is 0, 1, or 2); and (B) a condensation catalyst.
    Type: Application
    Filed: March 28, 2012
    Publication date: October 4, 2012
    Applicant: WACKER CHEMIE AG
    Inventor: Kotaro Kuwata
  • Publication number: 20120123051
    Abstract: An object of the invention is to provide an adhesive silicone rubber composition which has superior adhesion to various thermoset resins, especially to polyurethane. The composition comprises of (A) a polyorganosiloxane having at least two alkenyl groups, (B) a polyorganohydrogensiloxane which has at least two hydrogen atoms bonded to silicon atoms, (C) an organosilicon compound having aromatic hydrocarbon group and alkoxy group bonded to silicon atom, (D) an organometal compound which can be catalyst for condensation reaction of (C) component, (E) a polyorganosiloxane resin, and (F) catalytic amount of hydrosilylation reaction catalyst.
    Type: Application
    Filed: July 23, 2010
    Publication date: May 17, 2012
    Applicant: WACKER CHEMIE AG
    Inventor: Kotaro Kuwata
  • Patent number: 7514520
    Abstract: A process for producing a phosphonitrilic acid ester. The process comprises using a specific compound as a catalyst to react phosphonitrile dichloride with at least one member selected among phenol compounds and/or alcohol compounds in the presence of a reaction solvent. Alternatively, the process comprises reacting a liquid reaction mixture obtained in a first stage with at least one member selected among phenol compounds and/or alcohol compounds without isolating phosphonitrile dichloride from the mixture.
    Type: Grant
    Filed: June 3, 2004
    Date of Patent: April 7, 2009
    Assignee: Asahi Kasei Chemicals Corporation
    Inventors: Kotaro Kuwata, Hiroji Oda
  • Publication number: 20080091050
    Abstract: <Problem to be Solved> A process for producing a cyclic and/or linear phosphonitrilic acid ester from a cyclic and/or linear phosphonitrile dichloride is provided, wherein the reaction time is shorter and the content of monochloro phosphazenes is very small. <Solution> When phosphonitrile dichloride is reacted with a metal arylolate and/or a metal alcoholate in the presence of a reaction solvent, a metal arylolate and/or a metal alcoholate composed of at least two different metals having different ionization energies is used and also a specific compound is used as a catalyst.
    Type: Application
    Filed: January 18, 2006
    Publication date: April 17, 2008
    Applicant: ASAHI KASEI CHEMICAL CORPORATION
    Inventors: Kotaro Kuwata, Hideki Date
  • Publication number: 20070060739
    Abstract: A process for producing a phosphonitrilic acid ester. The process comprises using a specific compound as a catalyst to react phosphonitrile dichloride with at least one member selected among phenol compounds and/or alcohol compounds in the presence of a reaction solvent. Alternatively, the process comprises reacting a liquid reaction mixture obtained in a first stage with at least one member selected among phenol compounds and/or alcohol compounds without isolating phosphonitrile dichloride from the mixture.
    Type: Application
    Filed: June 3, 2004
    Publication date: March 15, 2007
    Inventors: Kotaro Kuwata, Hiroji Oda
  • Patent number: 7090813
    Abstract: The present invention provides a method for producing cyclic chlorophosphazene oligomers, in particular the trimer and tetramer, in a high yield and selectivity. The method for producing cyclic chlorophosphazene oligomers involves the reaction between chlorinated phosphorus and ammonium chloride in the presence of a reaction catalyst, wherein 1) moisture is present in the reaction system at a molar fraction of 5×10?3 or less based on the total moles of the chlorinated phosphorus added to the reaction system, and 2) the ammonium chloride has an average particle size of 10 ?m or less and the value of particle size distribution of 2 or more, estimated by the Rosin-Rammler equation.
    Type: Grant
    Filed: January 9, 2004
    Date of Patent: August 15, 2006
    Assignee: Asaki Kasei Chemicals Corporation
    Inventor: Kotaro Kuwata
  • Patent number: 6825264
    Abstract: Disclosed is a flame retardant resin composition comprising: 100 parts by weight of a resin component (A) which is a resin mixture of an aromatic polycarbonate and a styrene polymer, wherein the resin mixture has an aromatic polycarbonate content of from 50 to 95% by weight and a styrene polymer content of from 5 to 50% by weight; 0.1 to 30 parts by weight of an organopolysiloxane (B) which comprises 0 to 70 mol % of a monofunctional siloxane unit (M unit), 0 to 100 mol % of a bifunctional recurring siloxane unit (D unit), 0 to 100 mol % of a trifunctional recurring siloxane unit (T unit), and 0 to 63 mol % of a tetrafunctional recurring siloxane unit (Q unit); and 0.0005 to 5 parts by weight of at least one inorganic metal salt (C) selected from the group consisting of inorganic alkali metal salts and inorganic alkaline earth metal salts.
    Type: Grant
    Filed: October 11, 2002
    Date of Patent: November 30, 2004
    Assignees: Asahi Kasei Chemicals Corporation, Wacker-Chemie Gesellschaft mit Beschrankter Haftung
    Inventors: Hiroji Oda, Kotaro Kuwata
  • Publication number: 20040146443
    Abstract: The present invention provides a method for producing cyclic chlorophosphazene oligomers, in particular the trimer and tetramer, in a high yield and selectivity. The method for producing cyclic chlorophosphazene oligomers involves the reaction between chlorinated phosphorus and ammonium chloride in the presence of a reaction catalyst, wherein 1) moisture is present in the reaction system at a molar fraction of 5×10−3 or less based on the total moles of the chlorinated phosphorus added to the reaction system, and 2) the ammonium chloride has an average particle size of 10 &mgr;m or less and the value of particle size distribution of 2 or more, estimated by the Rosin-Rammler equation.
    Type: Application
    Filed: January 9, 2004
    Publication date: July 29, 2004
    Inventor: Kotaro Kuwata
  • Publication number: 20030109660
    Abstract: Disclosed is a flame retardant resin composition comprising: 100 parts by weight of a resin component (A) which is a resin mixture of an aromatic polycarbonate and a styrene polymer, wherein the resin mixture has an aromatic polycarbonate content of from 50 to 95% by weight and a styrene polymer content of from 5 to 50% by weight; 0.1 to 30 parts by weight of an organopolysiloxane (B) which comprises 0 to 70 mol % of a monofunctional siloxane unit (M unit), 0 to 100 mol % of a bifunctional recurring siloxane unit (D unit), 0 to 100 mol % of a trifunctional recurring siloxane unit (T unit), and 0 to 63 mol % of a tetrafunctional recurring siloxane unit (Q unit); and 0.0005 to 5 parts by weight of at least one inorganic metal salt (C) selected from the group consisting of inorganic alkali metal salts and inorganic alkaline earth metal salts.
    Type: Application
    Filed: October 11, 2002
    Publication date: June 12, 2003
    Inventors: Hiroji Oda, Kotaro Kuwata