Patents by Inventor Igor A. Mekhed

Igor A. Mekhed 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 of preparing styrene polymers by suspension polymerization
    Patent number: 5464915
    Abstract: In a method of preparing styrene plastics, the water medium containing tricalcium phosphate is prepared in situ (0.15 to 1.5 wt. %). Then, calcium carbonate (0.07 to 0.35 wt. %) is heated and dispersed therein. Thereafter, the monomer/comonomers/prepolymer, and secondary sodium alkylsulphates (0.001 to 0.020 wt. %) are introduced into the suspension polymerization process at 15 to 47% conversion. This method permits production of styrene plastics using a common technology, while providing specified bead size distribution, low concentration of dust fractions, and enhancement of the process stability.
    Type: Grant
    Filed: April 26, 1993
    Date of Patent: November 7, 1995
    Assignees: Plastpolymer Share Holding Company, Angarsk Oil Chemical Share Holding Company
    Inventors: Galina D. Ballova, Vladimir G. Rupyshev, Sergei G. Rumyantsev, Viktor V. Amosov, Igor A. Mekhed, Larisa V. Alexeeva, Viktor A. Pykhtin, Mikhail D. Rolnik, Evgenia N. Eremina, Valentina P. Shamina, Larisa F. Maladzyanova, Valentina G. Karmakova, Svetiana V. Kusheverskaya, Vera K. Abramova, Mikhail G. Rozhavsky