Patents by Inventor Kyu Il Lee

Kyu Il Lee 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: 7326804
    Abstract: Provided is a novel triethyleneglycol based compound, a plasticizer composition for polyvinyl chloride resin including the same, and a method of preparing the plasticizer composition. In particular, the plasticizer composition for polyvinyl chloride resin includes the novel compound, 2-(2-(2-(2-ethylhexanoyloxy)ethoxy)ethoxy)ethyl 2-ethylhexanoate, and 2-(2-(2-phenylcarbonyloxyethoxy)ethoxy)ethyl benzoate in a proper mixture ratio. A polyvinyl chloride prepared using the plasticizer composition has low heating loss, excellent adhesion, high plasticization efficiency, high elongation, high tensile strength, and high transparency.
    Type: Grant
    Filed: April 12, 2006
    Date of Patent: February 5, 2008
    Assignee: LG Chem, Ltd.
    Inventors: Hyunkyu Kim, Kyeseok Lee, Kyu Il Lee, Byoungkue Chun
  • Publication number: 20070027240
    Abstract: The present invention relates to a diethylene glycol ester based plasticizer composition comprising at least two diethylene glycol ester compounds. The diethylene glycol ester based plasticizer composition of the present invention offers superior tensile strength, elongation, transfer resistance, hardness, transparency, adhesivity, and compatibility with resin, when used for a plasticizer of a polyvinyl chloride resin, without releasing environmental hormones. Thus, it can be used for a polyvinyl chloride resin of a warp film.
    Type: Application
    Filed: September 9, 2004
    Publication date: February 1, 2007
    Inventors: Kye-Seok Lee, Kyu-Il Lee, Hyun-Kyu Kim, Chil-Eui Hong, Dong-Hwa Gong, Hyun-Ju Kim
  • Patent number: 6831121
    Abstract: The present invention relates to a trimethylolpropane ester-based plasticizer composition for polyvinyl chloride resin, more particularly a plasticizer composition comprising trimethylolpropane ester capable of using as plasticizer of polyvinyl chloride resin. The present invention can prepare polyvinyl chloride resin having superior tensile strength, elongation, migration, and sheet heating loss etc. by using the plasticizer composition.
    Type: Grant
    Filed: August 22, 2002
    Date of Patent: December 14, 2004
    Assignee: LG Chem, Ltd.
    Inventors: Kye-Seok Lee, Kyu-Il Lee, Hyun-Kyu Kim
  • Patent number: 6703436
    Abstract: The present invention relates to a plasticizer composition, and more particularly a plasticizer composition comprising neopentylglycol ester capable of being using as plasticizer of polyvinyl chloride resin, and method of prepation thereof. The plasticizer composition of the present invention can prepare polyvinyl chloride resin having superior tensile strength, elongation, static heat resistance, and viscosity stability etc.
    Type: Grant
    Filed: October 23, 2002
    Date of Patent: March 9, 2004
    Assignee: LG Chem, Ltd.
    Inventors: Kye-Seok Lee, Kyu-Il Lee, Hyun-Kyu Kim
  • Publication number: 20030061969
    Abstract: The present invention relates to a plasticizer composition, and more particularly a plasticizer composition comprising neopentylglycol ester capable of being using as plasticizer of polyvinyl chloride resin, and method of prepation thereof. The plasticizer composition of the present invention can prepare polyvinyl chloride resin having superior tensile strength, elongation, static heat resistance, and viscosity stability etc.
    Type: Application
    Filed: October 23, 2002
    Publication date: April 3, 2003
    Inventors: Kye-Seok Lee, Kyu-Il Lee, Hyun-Kyu Kim
  • Publication number: 20030065073
    Abstract: The present invention relates to a trimethylolpropane ester-based plasticizer composition for polyvinyl chloride resin, more particularly a plasticizer composition comprising trimethylolpropane ester capable of using as plasticizer of polyvinyl chloride resin. The present invention can prepare polyvinyl chloride resin having superior tensile strength, elongation, migration, and sheet heating loss etc. by using the plasticizer composition.
    Type: Application
    Filed: August 22, 2002
    Publication date: April 3, 2003
    Inventors: Kye-Seok Lee, Kyu-Il Lee, Hyun-Kyu Kim