Patents by Inventor Katsuyoshi Kubo

Katsuyoshi Kubo 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: 7842390
    Abstract: Chain end functionalized fluoropolymers are disclosed exhibiting good chemical reactivity high breakdown electric field (E>100 MV/m) and high dielectric constants (i.e., ?>10). The polymers can be prepared by functional initiators and from a variety of fluoromonomers including vinylidene difluoride together with one or more additional monomers. The polymers can be combined with other dielectric materials to form composites having uniform composition and morphology.
    Type: Grant
    Filed: October 3, 2006
    Date of Patent: November 30, 2010
    Assignees: The Penn State Research Foundation, Daikin America, Inc.
    Inventors: Tze-Chiang Chung, Zhicheng Zhang, Shangtao Chen, Katsuyoshi Kubo, Koji Kigawa
  • Publication number: 20090046274
    Abstract: Light scattering processes are employed to measure molecular weight and related characteristics of polymeric materials, including without limitation refractory fluoropolymers. The processes utilize a pressurized cell and a fluid under pressure to solubilize the polymeric materials and to enable light scattering measurements to be performed.
    Type: Application
    Filed: July 22, 2008
    Publication date: February 19, 2009
    Inventors: Mark A. McHugh, Andrei F. Kostko, Koji Kigawa, Katsuyoshi Kubo
  • Publication number: 20080081195
    Abstract: Chain end functionalized fluoropolymers are disclosed exhibiting good chemical reactivity high breakdown electric field (E>100 MV/m) and high dielectric constants (i.e., ?>10). The polymers can be prepared by functional initiators and from a variety of fluoromonomers including vinylidene difluoride together with one or more additional monomers. The polymers can be combined with other dielectric materials to form composites having uniform composition and morphology.
    Type: Application
    Filed: October 3, 2006
    Publication date: April 3, 2008
    Inventors: Tze-Chiang Chung, Zhicheng Zhang, Shangtao Chen, Katsuyoshi Kubo, Koji Kigawa
  • Publication number: 20070248823
    Abstract: A fiber contains a fluorine-containing copolymer such as EFEP. The fiber is preferably a non-hollow monofilament fiber, and the fluorine-containing copolymer preferably has a melt index (MI) below 100. A fabric contains a fluorine-containing copolymer such as EFEP. The fabric preferably includes non-hollow monofilament fibers, which contain the fluorine-containing copolymer, and the fluorine-containing copolymer preferably has a melt index (MI) below 100.
    Type: Application
    Filed: April 23, 2007
    Publication date: October 25, 2007
    Applicant: Daikin Industries, Ltd.
    Inventors: Chris S. Moore, Katsuyoshi Kubo
  • Patent number: 7262257
    Abstract: Telechelic polymers having two reactive functional groups at the same polymer chain end are disclosed. These polymers can be prepared by combining a cycloborane initiator, at least one free radical polymerizable monomer and oxygen to form a polymer segment having a borane residue at one end of the polymer segment resulting from the cycloborane initiator; and converting the borane residue to at least two functional groups to form the telechelic polymer.
    Type: Grant
    Filed: February 17, 2004
    Date of Patent: August 28, 2007
    Assignees: The Penn State Research Foundation, The Daikin Institute of Advanced Chemistry and Technology, Int.
    Inventors: Tze-Chiang Chung, Han Hong, Masahiko Oka, Katsuyoshi Kubo
  • Patent number: 7220807
    Abstract: Functional fluoro-monomers are polymerized with an organoborane functional initiator in the presence of oxygen to yield functional fluoropolymers and copolymers to produce functional polymers having functional groups at the beginning of the polymer chain.
    Type: Grant
    Filed: June 24, 2005
    Date of Patent: May 22, 2007
    Assignees: Penn State Research Foundation, Daikin Institute of Advanced Chemistry and Technology, Inc.
    Inventors: Tze-Chiang Chung, Han Hong, Masahiko Oka, Katsuyoshi Kubo
  • Publication number: 20060041090
    Abstract: Functional fluoro-monomers are polymerized with an organoborane functional initiator in the presence of oxygen to yield functional fluoropolymers and copolymers to produce functional polymers having functional groups at the beginning of the polymer chain.
    Type: Application
    Filed: June 24, 2005
    Publication date: February 23, 2006
    Inventors: Tze-Chiang Chung, Han Hong, Masahiko Oka, Katsuyoshi Kubo
  • Publication number: 20060014904
    Abstract: A polymer composition of matter is disclosed which includes a thermoplastic polymer and a fluorine-containing polymer. The thermoplastic polymer is an amorphous non-fluorinated thermoplastic polymer or a crystalline non-fluorinated thermoplastic polymer with a melting point of 180° C. or higher. The fluorine-containing polymer has a zero shear viscosity at 340° C. of 0.2 Pa.s or greater and less than 5000 Pa.s, and is present to the extent of 0.005-2 mass % of the total of the thermoplastic polymer and the fluorine-containing polymer.
    Type: Application
    Filed: July 13, 2005
    Publication date: January 19, 2006
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Masahiko Oka, Katsuyoshi Kubo, Tsuyoshi Miyamori, Yoshiki Maruya, Megumi Satou
  • Publication number: 20050182208
    Abstract: Telechelic polymers having two reactive functional groups at the same polymer chain end are disclosed. These polymers can be prepared by combining a cycloborane initiator, at least one free radical polymerizable monomer and oxygen to form a polymer segment having a borane residue at one end of the polymer segment resulting from the cycloborane initiator; and converting the borane residue to at least two functional groups to form the telechelic polymer.
    Type: Application
    Filed: February 17, 2004
    Publication date: August 18, 2005
    Inventors: Tze-Chiang Chung, Han Hong, Masahiko Oka, Katsuyoshi Kubo
  • Patent number: 6911509
    Abstract: Functional fluoro-monomers are polymerized with an organoborane initiator to yield functional fluoro-polymers and copolymers including functional polymers prepared from monomers having allylic protons, Si—H groups, and olefinic groups.
    Type: Grant
    Filed: February 17, 2004
    Date of Patent: June 28, 2005
    Assignees: The Penn State Research Foundation, Daikin Institute of Advanced Chemistry and Technology, Inc.
    Inventors: Tze-Chiang Chung, Han Hong, Masahiko Oka, Katsuyoshi Kubo
  • Publication number: 20040242771
    Abstract: The present invention is a low-temperature-decomposable engineering plastic resin composition prepared by formulating a low-temperature-decomposable engineering plastic with a fluorine-containing resin, wherein said low-temperature-decomposable engineering plastic has a melting point of not higher than 200° C. and a decomposition temperature of not higher than 300° C., and wherein said fluorine-containing resin is a resin comprising a fluorine-containing polymer, said fluorine-containing polymer having a fluorine atom and at least one atom species selected from the group consisting of hydrogen atom, chlorine atom, bromine atom and iodine atom, said fluorine atom and said at least one atom species being bound to a non-terminal carbon atom constituting a main chain, and said fluorine-containing polymer having substantially no polar functional groups reactive to the low-temperature-decomposable engineering plastic.
    Type: Application
    Filed: August 20, 2003
    Publication date: December 2, 2004
    Inventors: Katsuyoshi Kubo, Takahide Otsuka, Masahiko Oka, Tsuyoshi Miyamori, Charles W. Stewart, Carolyn Stewart
  • Publication number: 20040102572
    Abstract: The present invention is a resin composition prepared by formulating an engineering plastic with a fluorine-containing polymer wherein said fluorine-containing polymer accounts for 0.005 to 1 mass % of the total of a mass of said engineering plastic and a mass of said fluorine-containing polymer, wherein said fluorine-containing polymer is a perfluoropolymer, and wherein said resin composition is used for extrusion molding or injection molding.
    Type: Application
    Filed: August 25, 2003
    Publication date: May 27, 2004
    Inventors: Katsuyoshi Kubo, Takahide Otsuka, Masahiko Oka, Tsuyoshi Miyamori, Charles W. Stewart, Carolyn Stewart
  • Publication number: 20030109646
    Abstract: A resin composition prepared by formulating an engineering plastic with a fluorine-containing polymer in a mass ratio of the engineering plastic to the fluorine-containing polymer of from 99:1 to 99.995:0.005. Also disclosed is a method for producing a shaped article by melting and molding the resin composition.
    Type: Application
    Filed: November 21, 2001
    Publication date: June 12, 2003
    Applicant: DAIKIN INSTITUTE OF ADVANCED CHEMISTRY AND TECHNOLOGY
    Inventors: Katsuyoshi Kubo, Takahide Otsuka, Masahiko Oka, Charles W. Stewart, Carolyn Stewart
  • Patent number: 4836944
    Abstract: A halogen-containing polyether which comprises a repeating unit structure of the formula:--(CH.sub.2 CF.sub.2 CF.sub.2 O).sub.a --(CHClCF.sub.2 CF.sub.2 O).sub.b --(CCl.sub.2 CF.sub.2 CF.sub.2 O).sub.c --(CHFCF.sub.2 CF.sub.2 O).sub.d --(CFClCF.sub.2 CF.sub.2 O).sub.e --(CF.sub.2 CF.sub.2 CF.sub.2 O).sub.f --(I)wherein a, b, c, d, e and f are each 0 or a positive integer and satisfy the following equations:2.ltoreq.a+b+c+d+e+f.ltoreq.200 and 1.ltoreq.a+c+d+fand at least one terminal group selected from the group consisting of groups represented by the formulas:--CH.sub.2 OH, --COOR.sup.1, --CONR.sup.1.sub.2, --COOOR.sup.2 Ph and --R.sup.2 Phwherein R.sup.1 is a hydrogen atom, a C.sub.1 -C.sub.5 alkyl group or an aromatic group, R.sup.2 is a divalent organic group and Ph is an aromatic group, which has good lubricating properties.
    Type: Grant
    Filed: June 1, 1988
    Date of Patent: June 6, 1989
    Assignee: Daikin Industries Ltd.
    Inventors: Takashi Tohzuka, Sueyoshi Ishikawa, Katsuyoshi Kubo, Yoshitaka Honda, Yukio Ohmure, Norio Kataoka