Patents by Inventor Sei Hoon Kim

Sei Hoon Kim 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: 9637589
    Abstract: Provided is a method of continuous preparation of a biodegradable aliphatic/aromatic polyester copolymer, the method including: performing a first esterification reaction of an aliphatic dihydroxy compound and an aliphatic dicarboxylic acid at a temperature of 185° C. or less; continuously performing a second esterification reaction of a reaction product obtained by the first esterification reaction; obtaining a pre-polymer by continuously performing a first polycondensation reaction of a reaction product obtained by the second esterification reaction; and continuously performing polycondensation reaction of the pre-polymer, wherein an aromatic carboxylic acid is added to a reactor in which the first esterification reaction or the second esterification reaction is performed, to prepare the biodegradable aliphatic/aromatic polyester copolymer.
    Type: Grant
    Filed: May 20, 2013
    Date of Patent: May 2, 2017
    Assignees: LOTTE FINE CHEMICAL CO., LTD., S-ENPOL CO., LTD.
    Inventors: Gyung Don Kang, Ki Chull Yun, Sang Yob Kim, Kil Seuk Byun, Jung Ryum, Boo Seong Kim, Sei Hoon Kim, Sung Bae Park
  • Patent number: 9447233
    Abstract: A continuous preparation method of a biodegradable aliphatic/aromatic polyester copolymer includes: performing a first esterification reaction of an aliphatic dihydroxy compound with an aliphatic dicarboxylic acid at a temperature of 185° C.
    Type: Grant
    Filed: July 18, 2013
    Date of Patent: September 20, 2016
    Assignees: LOTTE FINE CHEMICAL CO., LTD., S-ENPOL CO., LTD.
    Inventors: Gyung Don Kang, Ki Chull Yun, Sang Yob Kim, Kil Seuk Byun, Jung Ryum, Boo Seong Kim, Sei Hoon Kim, Sung Bae Park
  • Patent number: 9416224
    Abstract: A continuous preparation method of a biodegradable aliphatic/aromatic polyester copolymer includes: performing a first esterification reaction of an aliphatic dihydroxy compound with an aliphatic dicarboxylic acid at a temperature of 185° C. or less; continuously performing a second esterification reaction of a reaction product from the first esterification reaction; continuously performing a first polycondensation reaction of a reaction product from the second esterification reaction to obtain a prepolymer; continuously performing a second polycondensation reaction of the prepolymer to obtain a second polycondensation reaction product having an intrinsic viscosity from about 0.9 dl/g to about 1.
    Type: Grant
    Filed: July 18, 2013
    Date of Patent: August 16, 2016
    Assignees: LOTTE FINE CHEMICAL CO., LTD., S-ENPOL CO., LTD.
    Inventors: Gyung Don Kang, Ki Chull Yun, Sang Yob Kim, Kil Seuk Byun, Jung Ryum, Boo Seong Kim, Sei Hoon Kim, Sung Bae Park
  • Patent number: 9403938
    Abstract: A continuous preparation method of a biodegradable aliphatic/aromatic polyester copolymer includes: performing a first esterification reaction of an aliphatic dihydroxy compound with an aliphatic dicarboxylic acid at a temperature of 185° C.
    Type: Grant
    Filed: July 18, 2013
    Date of Patent: August 2, 2016
    Assignees: LOTTE FINE CHEMICAL CO., LTD., S-ENPOL CO., LTD.
    Inventors: Gyung Don Kang, Ki Chull Yun, Sang Yob Kim, Kil Seuk Byun, Jung Ryum, Boo Seong Kim, Sei Hoon Kim, Sung Bae Park
  • Patent number: 9334359
    Abstract: Provided is a method of continuous production of a biodegradable aliphatic polyester including continuously performing an esterification reaction of a mixture including an aliphatic dihydroxy compound and aliphatic dicarboxylic acid at a temperature of 185° C. or less to obtain an ester; continuously performing a first polycondensation reaction of the ester to obtain a preliminary polymer; and continuously performing a polycondensation reaction of the preliminary polymer. According to the method of production, an amount of the aliphatic dihydroxy compound used decreases, which is a starting material, thereby decreasing the manufacturing cost of the biodegradable aliphatic polyester.
    Type: Grant
    Filed: May 20, 2013
    Date of Patent: May 10, 2016
    Assignees: LOTTE FINE CHEMICAL CO., LTD., S-ENPOL CO., LTD.
    Inventors: Gyung Don Kang, Ki Chull Yun, Sang Yob Kim, Jung Ryum, Boo Seong Kim, Kil Seuk Byun, Sei Hoon Kim, Sung Bae Park
  • Publication number: 20150315334
    Abstract: A continuous preparation method of a biodegradable aliphatic/aromatic polyester copolymer includes: performing a first esterification reaction of an aliphatic dihydroxy compound with an aliphatic dicarboxylic acid at a temperature of 185° C.
    Type: Application
    Filed: July 18, 2013
    Publication date: November 5, 2015
    Inventors: Gyung Don KANG, Ki Chull YUN, Sang Yob KIM, Kil Seuk BYUN, Jung RYUM, Boo Seong KIM, Sei Hoon KIM, Sung Bae PARK
  • Publication number: 20150315335
    Abstract: A continuous preparation method of a biodegradable aliphatic/aromatic polyester copolymer includes: performing a first esterification reaction of an aliphatic dihydroxy compound with an aliphatic dicarboxylic acid at a temperature of 185° C.
    Type: Application
    Filed: July 18, 2013
    Publication date: November 5, 2015
    Applicants: SAMSUNG FINE CHEMICALS CO., LTD., S-ENPOL CO., LTD.
    Inventors: Gyung Don KANG, Ki Chull YUN, Sang Yob KIM, Kil Seuk BYUN, Jung RYUM, Boo Seong KIM, Sei Hoon KIM, Sung Bae PARK
  • Publication number: 20150307657
    Abstract: A continuous preparation method of a biodegradable aliphatic/aromatic polyester copolymer includes: performing a first esterification reaction of an aliphatic dihydroxy compound with an aliphatic dicarboxylic acid at a temperature of 185° C. or less; continuously performing a second esterification reaction of a reaction product from the first esterification reaction; continuously performing a first polycondensation reaction of a reaction product from the second esterification reaction to obtain a prepolymer; continuously performing a second polycondensation reaction of the prepolymer to obtain a second polycondensation reaction product having an intrinsic viscosity from about 0.9 dl/g to about 1.
    Type: Application
    Filed: July 18, 2013
    Publication date: October 29, 2015
    Inventors: Gyung Don KANG, Ki Chull YUN, Sang Yob KIM, Kil Seuk BYUN, Jung RYUM, Boo Seong KIM, Sei Hoon KIM, Sung Bae PARK
  • Publication number: 20150252142
    Abstract: Provided is a method of continuous production of a biodegradable aliphatic polyester including continuously performing an esterification reaction of a mixture including an aliphatic dihydroxy compound and aliphatic dicarboxylic acid at a temperature of 185° C. or less to obtain an ester; continuously performing a first polycondensation reaction of the ester to obtain a preliminary polymer; and continuously performing a polycondensation reaction of the preliminary polymer. According to the method of production, an amount of the aliphatic dihydroxy compound used decreases, which is a starting material, thereby decreasing the manufacturing cost of the biodegradable aliphatic polyester.
    Type: Application
    Filed: May 20, 2013
    Publication date: September 10, 2015
    Inventors: Gyung Don Kang, Ki Chull Yun, Sang Yob Kim, Jung Ryum, Boo Seong Kim, Kil Seuk Byun, Sei Hoon Kim, Sung Bae Park
  • Publication number: 20150183927
    Abstract: Provided is a method of continuous preparation of a biodegradable aliphatic/aromatic polyester copolymer, the method including: performing a first esterification reaction of an aliphatic dihydroxy compound and an aliphatic dicarboxylic acid at a temperature of 185° C. or less; continuously performing a second esterification reaction of a reaction product obtained by the first esterification reaction; obtaining a pre-polymer by continuously performing a first polycondensation reaction of a reaction product obtained by the second esterification reaction; and continuously performing polycondensation reaction of the pre-polymer, wherein an aromatic carboxylic acid is added to a reactor in which the first esterification reaction or the second esterification reaction is performed, to prepare the biodegradable aliphatic/aromatic polyester copolymer.
    Type: Application
    Filed: May 20, 2013
    Publication date: July 2, 2015
    Applicants: S-ENPOL CO., LTD., SAMSUNG FINE CHEMICALS CO., LTD.
    Inventors: Gyung Don Kang, Ki Chull Yun, Sang Yob Kim, Kil Seuk Byun, Jung Ryum, Boo Seong Kim, Sei Hoon Kim, Sung Bae Park
  • Publication number: 20130202223
    Abstract: Provided is a biodegradable resin including a urethane bond generated by a reaction of a polyester polymer with a polyvalent isocyanate used as a chain extender. Particularly, provided is a method of preparing a biodegradable resin using a limited amount of the chain extender and having excellent properties, and a biodegradable resin in which nitrogen content is controlled. Therefore, the biodegradable resin which can reduce the use of a harmful component to the human body and environment in the process of preparing the biodegradable resin and can be safely used for packing materials for food or medicine is provided.
    Type: Application
    Filed: April 29, 2011
    Publication date: August 8, 2013
    Applicants: S-ENPOL CO., LTD., SAMSUNG FINE CHEMICALS CO., LTD.
    Inventors: Gyung Don Kang, Ki Chull Yun, Jong Pil Chun, Ji Soo Ahn, Ye Jin Kim, Sei Hoon Kim, Seong Yong Hong, Sung Bae Park