Patents by Inventor Keehoon Won

Keehoon Won 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).

  • Process for preparing phenolic polymer by using phenothiazines mediator
    Patent number: 7737245
    Abstract: The present invention relates to a process for preparing a phenolic polymer using a phenothiazine-based mediator, in particular, to a process for preparing a phenolic polymer via polymerization of phenolic monomers by using a phenothiazine-based mediator in the presence of peroxidase biocatalyst and an oxidant, thereby drastically improving the enzyme reactivity of peroxidase. The phenolic polymers prepared according to the polymerization of this invention maintain unsaturated hydrocarbon groups linked to their side chains, so that they are very useful as a curing resin because they can easily form coatings through radical curing. In addition, the coating formed using the curing resin has an antioxidation effect and a low surface energy, so that they can prevent physical attachment of marine livings. Because the antifouling-causing functional groups are not consumed, the coatings continuously exhibit durability.
    Type: Grant
    Filed: May 11, 2004
    Date of Patent: June 15, 2010
    Assignee: Korea Research Institute of Chemical Technology
    Inventors: Yong Hwan Kim, Eun Suk An, Keehoon Won, Jae Kwang Song, Jeong Yong Ryu, Bong Keun Song
  • Process for Preparing Phenolic Polymer by Using Phenothiazines Mediator
    Publication number: 20070260027
    Abstract: The present invention relates to a process for preparing a phenolic polymer using a phenothiazine-based mediator, in particular, to a process for preparing a phenolic polymer via polymerization of phenolic monomers by using a phenothiazine-based mediator in the presence of peroxidase biocatalyst and an oxidant, thereby drastically improving the enzyme reactivity of peroxidase. The phenolic polymers prepared according to the polymerization of this invention maintain unsaturated hydrocarbon groups linked to their side chains, so that they are very useful as a curing resin because they can easily form coatings through radical curing. In addition, the coating formed using the curing resin has an antioxidation effect and a low surface energy, so that they can prevent physical attachment of marine livings. Because the antifouling-causing functional groups are not consumed, the coatings continuously exhibit durability.
    Type: Application
    Filed: May 11, 2004
    Publication date: November 8, 2007
    Inventors: Yong Kim, Eun An, Keehoon Won, Jae Song, Jeong Ryu, Bong Song