Patents by Inventor Sophia Dashevsky

Sophia Dashevsky 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).

  • Blend of polyethylene terephthalate matrix and thermotropic liquid crystal block copolymer
    Patent number: 5346970
    Abstract: Blends of a poly(ethylene terephthalate) matrix and a thermotropic liquid crystalline segmented block copolymer comprising rod (e.g., aromatic ester mesogen units containing flexible alkylene spacers) and flexible coil polymer blocks of poly(butylene terephthalate) can be used as molding compositions or in the formation of fibers and films.
    Type: Grant
    Filed: July 22, 1993
    Date of Patent: September 13, 1994
    Assignee: Akzo Nobel nv
    Inventors: Sophia Dashevsky, Ki-Soo Kim, Stanley W. Palmaka, Roy L. Johnston, Leonardus A. G. Busscher, Johannes A. Juijn
  • Thermotropic liquid crystalline poly(ester-amides)
    Patent number: 5319064
    Abstract: Thermotropic liquid crystalline poly(ester-amide) compositions are disclosed which comprise a bis(4-carbonyl phenylene) terephthalate unit and a unit derived from an N-substituted hydrocarbylenediamine (e.g., one derived from an N,N-dialkylalkylene).
    Type: Grant
    Filed: October 6, 1992
    Date of Patent: June 7, 1994
    Assignees: Univ. of Mass. at Amherst, Akzo N.V.
    Inventors: Thomas F. McCarthy, Robert W. Lenz, Simon W. Kantor, Ki-Soo Kim, Sophia Dashevsky
  • Forming preblend of flexible coil polymer and block copolymer of thermotropic liquid crystal polymer and flexible coil polymer
    Patent number: 5266658
    Abstract: Preblends with improved interfacial adhesion, capable of later melt blending, can be formed by heating, above their glass transition temperatures but below their melting temperatures, a flexible coil polymer, to serve as the matrix, and a lesser amount of a block copolymer of a thermotropic liquid crystal polymer and a flexible coil polymer.
    Type: Grant
    Filed: December 23, 1991
    Date of Patent: November 30, 1993
    Assignee: Akzo nv
    Inventors: Sophia Dashevsky, Ki-Soo Kim, Stanley W. Palmaka
  • Synthesis of block liquid crystal copolymer
    Patent number: 5258486
    Abstract: A single reactor process for formation of block copolymers comprising aromatic ester mesogenic units containing flexible alkane spacers and polyester flexible coil units in the main chain thereof which comprises reacting an .alpha.,.omega.-bis(hydroxybenzoyloxy) alkane monomer with an aromatic acid chloride in the presence of a functionalized flexible coil oligomer under temperature conditions in which an acid chloride-terminated bis(hydroxyalkyl terephthalate) oligomer was first formed at a first, lower temperature and the block copolymer was then formed at a second, higher temperature by reacting this oligomer with the functionalized flexible coil oligomer.
    Type: Grant
    Filed: July 31, 1992
    Date of Patent: November 2, 1993
    Assignee: Akzo nv
    Inventors: Ki-Soo Kim, Sophia Dashevsky, Jian-Lin Liu, Stanley W. Palmaka
  • Synthesis of block liquid crystal copolymer
    Patent number: 5194569
    Abstract: A single reactor process for formation of block copolymers comprising aromatic ester mesogenic units containing flexible alkane spacers and polyester flexible coil units in the main chain thereof which comprises:(a) reacting an .alpha., .omega.-bis(hydroxybenzoyloxy) alkane monomer with an aromatic acid chloride in a reactor to form a functionalized liquid crystal oligomer containing such mesoenic units; and(b) thereafter reacting the oligomer from (a) in the same reactor with either (i) a polyester oligomer; or (ii) the reagents for synthesizing the polyester oligomer (i).
    Type: Grant
    Filed: October 18, 1991
    Date of Patent: March 16, 1993
    Assignee: Akzo nv
    Inventors: Ki-Soo Kim, Sophia Dashevsky, Stanley W. Palmaka