Patents by Inventor Bok Ryul Yoo

Bok Ryul Yoo 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: 10196563
    Abstract: There is provided a phosphor powder which includes a wavelength converting material and a silica-based inorganic substance surrounding the wavelength converting material and represented by the following Formula 1, wherein a content of a hydrosilyl group (Si—H) is greater than or equal to 10 ppm by weight, based on the total weight of the silica-based inorganic substance: wherein X represents oxygen (O) or an amine group (NH), Y represents hydrogen (H), a hydroxyl group (OH), an amino group (NH2), or an alkyl group containing heteroelements, and the heteroelements include at least one selected from the group consisting of phosphorus (P), nitrogen (N), sulfur (S), oxygen (O), and a halogen element.
    Type: Grant
    Filed: June 10, 2016
    Date of Patent: February 5, 2019
    Assignee: Korea Institute of Science and Technology
    Inventors: Joon Soo Han, So Hye Cho, Bok Ryul Yoo, Seung Yong Lee
  • Publication number: 20170096599
    Abstract: There is provided a phosphor powder which includes a wavelength converting material and a silica-based inorganic substance surrounding the wavelength converting material and represented by the following Formula 1, wherein a content of a hydrosilyl group (Si—H) is greater than or equal to 10 ppm by weight, based on the total weight of the silica-based inorganic substance: wherein X represents oxygen (O) or an amine group (NH), Y represents hydrogen (H), a hydroxyl group (OH), an amino group (NH2), or an alkyl group containing heteroelements, and the heteroelements include at least one selected from the group consisting of phosphorus (P), nitrogen (N), sulfur (S), oxygen (O), and a halogen element.
    Type: Application
    Filed: June 10, 2016
    Publication date: April 6, 2017
    Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Joon Soo HAN, So Hye CHO, Bok Ryul YOO, Seung Yong LEE
  • Patent number: 9481579
    Abstract: The present invention relates to a method for preparing a hydrosilane using heteroatom-containing activated carbon, more particularly to a method for economically preparing a high-purity hydrosilane by redistribution of a chlorosilane using a heteroatom-containing activated carbon catalyst.
    Type: Grant
    Filed: December 24, 2014
    Date of Patent: November 1, 2016
    Assignee: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Bok Ryul Yoo, Joon Soo Han, Dong Won Lee
  • Publication number: 20160115036
    Abstract: The present invention relates to a method for preparing a hydrosilane using heteroatom-containing activated carbon, more particularly to a method for economically preparing a high-purity hydrosilane by redistribution of a chlorosilane using a heteroatom-containing activated carbon catalyst.
    Type: Application
    Filed: December 24, 2014
    Publication date: April 28, 2016
    Inventors: Bok Ryul YOO, Joon Soo HAN, Dong Won LEE
  • Publication number: 20150364632
    Abstract: The present invention relates to a solar cell having a wavelength converting layer formed of a polysilazane and a manufacturing method thereof to allow for low temperature sintering, to protect a wavelength converter from oxidation, degradation, and whitening, and thereby improve efficiency of the solar cell. The present invention provides for the solar cell including the wavelength converting layer which is formed by applying a coating solution containing a solvent, a polysilazane, and a wavelength converter onto a cell and an outer surface or inside of the cell, and then curing, and a manufacturing method of.
    Type: Application
    Filed: January 28, 2015
    Publication date: December 17, 2015
    Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: So Hye CHO, Il Ki HAN, Doo Hyun KO, Joon Soo HAN, Bok Ryul YOO, Seung Yong LEE, Hyungduk KO, Joon-Suh PARK
  • Patent number: 9127167
    Abstract: Disclosed are a functional reinforcing filler including inorganic particles surface-modified with an alkenylsilanol obtained by hydrolyzing an alkenylalkoxysilane compound, and a method for preparing the same. Since the disclosed functional reinforcing filler has a functional group having a double bond, it has good reactivity for styrene-butadiene rubber and sulfur. Thus, when used as a functional reinforcing filler in the manufacture of rubber, it allows improvement of physical properties through adjustment of the addition amount of sulfur without additional use of the coupling agent. In addition, because of superior hydrolysis reactivity, the problem of alcohol can be solved and a rubber mixture with long scorch time can be prepared. In particular, when the functional reinforcing filler of the present invention is used in the manufacture of tires, improvement in modulus, tensile strength, rotational resistance and wet traction performance can be expected.
    Type: Grant
    Filed: September 18, 2013
    Date of Patent: September 8, 2015
    Assignee: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Bok Ryul Yoo, Joon Soo Han, Dong Euy Jung
  • Publication number: 20150232745
    Abstract: There are provided a coating composition having excellent visible light transmittance and photoluminescence properties, and a wavelength converting thin film prepared by using the same. The coating composition according to the present invention includes a solvent, polysilazane, and a wavelength converting agent, and has visible light transmittance of 50% or more with respect to an aqueous solution. According to the present invention, a wavelength converting thin film having excellent visible light transmittance and photoluminescence properties can be prepared.
    Type: Application
    Filed: June 19, 2014
    Publication date: August 20, 2015
    Inventors: So Hye CHO, Joon Soo HAN, Seung Yong LEE, Jong Ku PARK, Dong Eui JUNG, Bok Ryul YOO
  • Patent number: 8815339
    Abstract: Disclosed herein are a surface modifier for metal oxide particles and a method of modifying the surface of metal oxide particles using the same. The surface modifier consists either of an alkylsilanepolyol containing a cyclic alkyl group capable of imparting steric hindrance or of a mixture of said alkylsilanepolyol with alkylalkoxysilane, and the method of modifying the surface of metal oxide particles comprises coating the surface modifier on the hydrophilic surface of the metal oxide particles through chemical bonding so as to impart hydrophobicity or amphiphilicity (hydrophilicity and hydrophobicity) and reactivity to the surface of the metal oxide particles.
    Type: Grant
    Filed: December 28, 2007
    Date of Patent: August 26, 2014
    Assignee: Korea Institute of Science and Technology
    Inventors: Bok Ryul Yoo, Joon Soo Han, Weon Cheol Lim, Yong Su Jung
  • Patent number: 8742104
    Abstract: Provided are a saturated N-heterocyclic carbene-ligand metal complex derivative, a method for preparing the same, and a method for preparing a silane compound by hydrosilylation using the same as a catalyst. To describe in more detail, the metal complex derivative has a saturated N-heterocyclic carbene derivative and an olefin ligand at the same time. A silane compound is prepared by hydrosilylation in the presence of the metal complex derivative as a catalyst. The provided metal complex derivative of the present invention has superior stability during hydrosilylation reaction and is capable of effectively performing the hydrosilylation reaction at low temperature even with small quantity. Further, a product with superior regioselectivity may be obtained. In addition, after the hydrosilylation reaction is completed, the metal complex derivative may be recovered and recycled.
    Type: Grant
    Filed: July 29, 2010
    Date of Patent: June 3, 2014
    Assignee: Korea Institute of Science and Technology
    Inventors: Bok Ryul Yoo, Joon Soo Han, Jang Hyun Yoo
  • Publication number: 20140102332
    Abstract: Disclosed are a functional reinforcing filler including inorganic particles surface-modified with an alkenylsilanol obtained by hydrolyzing an alkenylalkoxysilane compound, and a method for preparing the same. Since the disclosed functional reinforcing filler has a functional group having a double bond, it has good reactivity for styrene-butadiene rubber and sulfur. Thus, when used as a functional reinforcing filler in the manufacture of rubber, it allows improvement of physical properties through adjustment of the addition amount of sulfur without additional use of the coupling agent. In addition, because of superior hydrolysis reactivity, the problem of alcohol can be solved and a rubber mixture with long scorch time can be prepared. In particular, when the functional reinforcing filler of the present invention is used in the manufacture of tires, improvement in modulus, tensile strength, rotational resistance and wet traction performance can be expected.
    Type: Application
    Filed: September 18, 2013
    Publication date: April 17, 2014
    Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Bok Ryul YOO, Joon Soo HAN, Dong Euy JUNG
  • Patent number: 8563089
    Abstract: Disclosed are a functional reinforcing filler including inorganic particles surface-modified with an alkenylsilanol obtained by hydrolyzing an alkenylalkoxysilane compound, and a method for preparing the same. Since the disclosed functional reinforcing filler has a functional group having a double bond, it has good reactivity for styrene-butadiene rubber and sulfur. Thus, when used as a functional reinforcing filler in the manufacture of rubber, it allows improvement of physical properties through adjustment of the addition amount of sulfur without additional use of the coupling agent. In addition, because of superior hydrolysis reactivity, the problem of alcohol can be solved and a rubber mixture with long scorch time can be prepared. In particular, when the functional reinforcing filler of the present invention is used in the manufacture of tires, improvement in modulus, tensile strength, rotational resistance and wet traction performance can be expected.
    Type: Grant
    Filed: July 8, 2011
    Date of Patent: October 22, 2013
    Assignee: Korea Institute of Science and Technology
    Inventors: Bok Ryul Yoo, Joon Soo Han, Dong Euy Jung
  • Publication number: 20120277361
    Abstract: Disclosed are a functional reinforcing filler including inorganic particles surface-modified with an alkenylsilanol obtained by hydrolyzing an alkenylalkoxysilane compound, and a method for preparing the same. Since the disclosed functional reinforcing filler has a functional group having a double bond, it has good reactivity for styrene-butadiene rubber and sulfur. Thus, when used as a functional reinforcing filler in the manufacture of rubber, it allows improvement of physical properties through adjustment of the addition amount of sulfur without additional use of the coupling agent. In addition, because of superior hydrolysis reactivity, the problem of alcohol can be solved and a rubber mixture with long scorch time can be prepared. In particular, when the functional reinforcing filler of the present invention is used in the manufacture of tires, improvement in modulus, tensile strength, rotational resistance and wet traction performance can be expected.
    Type: Application
    Filed: July 8, 2011
    Publication date: November 1, 2012
    Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Bok Ryul YOO, Joon Soo HAN, Dong Euy JUNG
  • Patent number: 8278472
    Abstract: Provided is a method of preparing allylchlorosilane, and more particularly, a method of preparing allylchlorosilane with high yield by Si—C coupling reaction of an allyl chloride derivativce with a hydrosilane derivative under specific reaction conditions without using a catalyst.
    Type: Grant
    Filed: January 27, 2010
    Date of Patent: October 2, 2012
    Assignee: Korea Institute of Science and Technology
    Inventors: Bok Ryul Yoo, Joon Soo Han, Dong Won Lee
  • Patent number: 8129458
    Abstract: Provided are a functional reinforcing filler and a method of preparing the same, and more particularly, a functional reinforcing filler including inorganic particles having a surface modified by an organic silanepolyol obtained by hydrolyzing an organic alkoxysilane compound and a method of preparing the sane. The functional reinforcing filler has hydrophobicity and reactivity. If the functional reinforcing filler is used to prepare rubber, a coupling agent is not required, and the rubber does not emit volatile organic compounds (VOCs). In particular, a tire prepared using the functional reinforcing filler may have low rolling resistance and excellent wet traction.
    Type: Grant
    Filed: February 11, 2010
    Date of Patent: March 6, 2012
    Assignee: Korea Institute of Science and Technology
    Inventors: Bok Ryul Yoo, Joon Soo Han, Dong Euy Jung, Janghyun Yoo
  • Publication number: 20110160454
    Abstract: Provided are a saturated N-heterocyclic carbene-ligand metal complex derivative, a method for preparing the same, and a method for preparing a silane compound by hydrosilylation using the same as a catalyst. To describe in more detail, the metal complex derivative has a saturated N-heterocyclic carbene derivative and an olefin ligand at the same time. A silane compound is prepared by hydrosilylation in the presence of the metal complex derivative as a catalyst. The provided metal complex derivative of the present invention has superior stability during hydrosilylation reaction and is capable of effectively performing the hydrosilylation reaction at low temperature even with small quantity. Further, a product with superior regioselectivity may be obtained. In addition, after the hydrosilylation reaction is completed, the metal complex derivative may be recovered and recycled.
    Type: Application
    Filed: July 29, 2010
    Publication date: June 30, 2011
    Applicant: Korea Institute of Science and Technology
    Inventors: Bok Ryul Yoo, Joon Soo Han, Jang Hyun Yoo
  • Publication number: 20110130585
    Abstract: Provided is a method of preparing allylchlorosilane, and more particularly, a method of preparing allylchlorosilane with high yield by Si—C coupling reaction of an allyl chloride derivativce with a hydrosilane derivative under specific reaction conditions without using a catalyst.
    Type: Application
    Filed: January 27, 2010
    Publication date: June 2, 2011
    Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Bok Ryul YOO, Joon Soo HAN, Dong Won LEE
  • Publication number: 20110098389
    Abstract: Provided are a functional reinforcing filler and a method of preparing the same, and more particularly, a functional reinforcing filler including inorganic particles having a surface modified by an organic silanepolyol obtained by hydrolyzing an organic alkoxysilane compound and a method of preparing the sane. The functional reinforcing filler has hydrophobicity and reactivity. If the functional reinforcing filler is used to prepare rubber, a coupling agent is not required, and the rubber does not emit volatile organic compounds (VOCs). In particular, a tire prepared using the functional reinforcing filler may have low rolling resistance and excellent wet traction.
    Type: Application
    Filed: February 11, 2010
    Publication date: April 28, 2011
    Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Bok Ryul YOO, Joon Soo HAN, Dong Euy JUNG, Janghyun YOO
  • Publication number: 20090130306
    Abstract: Disclosed herein are a surface modifier for metal oxide particles and a method of modifying the surface of metal oxide particles using the same. The surface modifier consists either of an alkylsilanepolyol containing a cyclic alkyl group capable of imparting steric hindrance or of a mixture of said alkylsilanepolyol with alkylalkoxysilane, and the method of modifying the surface of metal oxide particles comprises coating the surface modifier on the hydrophilic surface of the metal oxide particles through chemical bonding so as to impart hydrophobicity or amphiphilicity (hydrophilicity and hydrophobicity) and reactivity to the surface of the metal oxide particles.
    Type: Application
    Filed: December 28, 2007
    Publication date: May 21, 2009
    Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNLOGY
    Inventors: Bok Ryul YOO, Joon Soo HAN, Weon Cheol LIM, Yong Su JUNG
  • Patent number: 7314946
    Abstract: The present invention relates to (2-cyclopentenyl)chlorosilane derivatives and the preparation method thereof. In particular, it relates to a very economical process which reacts cyclopentadiene, which is formed by a cracking of industrially produced low-priced dicyclopentadiene, with a silane compound containing silicon-hydrogen bonds at elevated temperature in a hydrocarbon compound with a boiling point of a predetermined range, thus also enabling to prevent problematic production of dicyclopentadiene polymer by using the hydrocarbon compound. Further, in the presence of a group 10 metal compound catalyst, the process herein is capable of lowering the reaction temperature and increasing the yield in the reaction of sterically hindered alkyl-dichlorosilane. The (2-cyclopentenyl)chlorosilane may be useful in preparing an organic silicon compound containing an unsaturated group or a functional silicone polymer using the same, or in modifying the surface or manufacturing a thin layer.
    Type: Grant
    Filed: December 6, 2006
    Date of Patent: January 1, 2008
    Assignee: Korea Institute of Science and Technology
    Inventors: Bok Ryul Yoo, Joon Soo Han, Weon Cheol Lim
  • Patent number: 7259272
    Abstract: The present invention relates to a ?-[2-(polyalkyleneoxy)ethylthio]alkylalkoxysilane derivative and a preparation method thereof, more particularly to a ?-[2-(polyalkyleneoxy)ethylthio]alkylalkoxysilane derivative prepared by transforming a (?-mercaptoalkyl)alkylalkoxysilane compound into a ?-(alkoxysilyl)alkylthiolate metal salt by treating it with a metallic base and performing dehalometallation at low reaction temperature using a poly(alkyleneoxy)alkyl ether halide or a poly(alkyleneoxy)bis(haloalkyl) ether to form a carbon-sulfur bond and a preparation method thereof. The novel compound of the present invention has not only a Si—OR bond but also contains a sulfur atom in the molecule, so that it can be used as monomer for synthesizing hydrophilic functional silicon polymers, source material of silicon-based surfactants and surface modifier of organic/inorganic materials.
    Type: Grant
    Filed: December 20, 2005
    Date of Patent: August 21, 2007
    Assignee: Korea Institute of Science and Technology
    Inventors: Bok Ryul Yoo, Joon Soo Han, Weon Cheol Lim, Joo-hyun Cho, Yoo Kyoung Jeon