Patents by Inventor Ki Chull YOON

Ki Chull YOON 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).

  • Method for preparing biodegradable polyester resin
    Patent number: 9617378
    Abstract: A method of preparing a biodegradable polyester resin is provided. The method of preparing a biodegradable polyester resin includes: (a) synthesizing the biodegradable polyester resin having a reheating crystallization initiation temperature (Tch1), a reheating crystallization peak temperature (Tch), and a reheating crystallization end temperature (Tch2); and (b) crystallizing the biodegradable polyester resin synthesized in step (a) by cooling the resin from a temperature of T1 to a temperature of T2 and then maintaining the resin at a temperature of T2 for a time of tc. Thus, the biodegradable polyester resin with improved solidification rate may be obtained.
    Type: Grant
    Filed: August 25, 2014
    Date of Patent: April 11, 2017
    Assignee: LOTTE FINE CHEMICAL CO., LTD.
    Inventors: Ye Jin Kim, Gyung Don Kang, Ki Chull Yoon
  • BIODEGRADABLE POLYESTER RESIN AND ARTICLE COMPRISING SAME
    Publication number: 20160244556
    Abstract: A biodegradable polyester resin and an article including the same are provided. The biodegradable polyester resin includes a diol residue (DO) that includes a cycloaliphatic diol residue (A) and an aliphatic diol residue (B); and a dicarboxylic acid residue (DC) that includes at least one of an aromatic dicarboxylic acid residue (C), an aliphatic dicarboxylic acid residue (D), and a cycloaliphatic dicarboxylic acid residue (E). Thus, the biodegradable polyester resin may have an excellent transparency and flexibility.
    Type: Application
    Filed: October 16, 2014
    Publication date: August 25, 2016
    Inventors: Min Kyoung Kim, Sang Mi Kang, Ji Soo Ahn, Ki Chull Yoon
  • METHOD FOR PREPARING BIODEGRADABLE POLYESTER RESIN
    Publication number: 20160222158
    Abstract: A method of preparing a biodegradable polyester resin is provided. The method of preparing a biodegradable polyester resin includes: (a) synthesizing the biodegradable polyester resin having a reheating crystallization initiation temperature (Tch1), a reheating crystallization peak temperature (Tch), and a reheating crystallization end temperature (Tch2); and (b) crystallizing the biodegradable polyester resin synthesized in step (a) by cooling the resin from a temperature of T1 to a temperature of T2 and then maintaining the resin at a temperature of T2 for a time of tc. Thus, the biodegradable polyester resin with improved solidification rate may be obtained.
    Type: Application
    Filed: August 25, 2014
    Publication date: August 4, 2016
    Inventors: Ye Jin Kim, Gyung Don Kang, Ki Chull Yoon
  • BIODEGRADABLE POLYESTER RESIN AND ARTICLE CONTAINING THE SAME
    Publication number: 20160090443
    Abstract: Provided are a biodegradable polyester resin and an article including the resin. The provided biodegradable polyester resin includes an aliphatic dicarboxylic acid residue including a succinic acid residue and an adipic acid residue; and an aliphatic diol residue including at least one selected from the group consisting of an ethylene glycol residue and a butanediol residue in order to improve biodegradability and flexibility.
    Type: Application
    Filed: May 30, 2014
    Publication date: March 31, 2016
    Applicant: SAMSUNG FINE CHEMICALS CO., LTD.
    Inventors: Ye Jin KIM, Gyung Don KANG, Su Kyung KIM, Min Kyoung KIM, Soo Youn CHOI, Ki Chull YOON, Kil Seuk BYUN