Patents by Inventor Suk K. Chang

Suk K. Chang 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).

  • Thermoplastic resin composition
    Patent number: 5412028
    Abstract: A thermoplastic resin composition comprising polybutylene terephthalate, a core-shell type copolymer, a multifunctional epoxy resin and a catalyst. The composition has excellent impact resistance and mechanical strength, and is capable of being processed by blow molding.
    Type: Grant
    Filed: October 28, 1993
    Date of Patent: May 2, 1995
    Assignee: Lucky, Ltd.
    Inventors: Jong K. Yeo, Suk K. Chang, Eun H. Koo, Min H. Lee
  • Polyolefinic resin composition having superior paintability
    Patent number: 5331046
    Abstract: The present invention relates to a polyolefinic resin composition having superior paintability which comprises:(A) 40 to 80 parts by weight of a crystalline polypropylene resin;(B) 1 to 50 parts by weight of a thermoplastic olefinic rubber prepared by dynamic-crosslinking 10 to 70 parts by weight of a crystalline polypropylene resin with 90 to 30 parts by weight of an ethylene-.alpha.-olefin rubber;(C) 0.5 to 30 parts by weight of a polypropylene resin modified by grafting a polar monomer which has a physical affinity, but is not reactive, with an ethylene copolymer or ethylene copolymer rubber modified with .alpha.,.beta.-unsaturated carboxylic acid or a derivative thereof; and(D) 1 to 40 parts by weight of said modified ethylene copolymer or ethylene copolymer rubber based on 100 parts by weight of the total weight of the components (A),(B) and (C).
    Type: Grant
    Filed: October 30, 1992
    Date of Patent: July 19, 1994
    Assignee: Lucky Limited
    Inventors: Suk K. Chang, In S. Seo, Dae W. Hong
  • Heat-sensitive recording material
    Patent number: 5179067
    Abstract: The present invention relates to a color forming solution including the benzoin derivatives as a sensitizer.
    Type: Grant
    Filed: May 23, 1991
    Date of Patent: January 12, 1993
    Assignee: Chonju Paper Mfg. Co., Ltd.
    Inventors: Suk K. Chang, Dong J. Yang, Kyu C. Paik, Don W. Kim, Jae S. Ryu
  • Method of producing an olefin thermoplastic resin composition
    Patent number: 4829125
    Abstract: A given amount of crystalline polypropylene resin is blended with an olefin copolymer rubber to prepare a preblend comprising an olefin copolymer rubber/crystalline polypropylene and then the preblend is melt-blended with a crystalline polypropylene resin in the presence of peroxide. The present invention is based upon the fracture mechanism occurring between the crystalline polypropylene and rubber and is accomplished by the reciprocal combination of the reactions such as cross-linking reaction, random scission reaction of the polymer main chain, graft reaction and blocking reaction to form a cell structure. An object of the present invention is to provide a method which results in a product having better homogeneity, better heat-resistance, higher impact-resistance and greater flowabilty than heretofore known methods of preparation.
    Type: Grant
    Filed: May 23, 1988
    Date of Patent: May 9, 1989
    Assignee: Lucky Ltd.
    Inventors: Jong K. Yeo, Jong M. Oh, Suk K. Chang, Eon S. Lee