Patents by Inventor Alexandr A. Evstratov

Alexandr A. Evstratov 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).

  • Patent number: 4396780
    Abstract: The proposed method resides in that alkylene oxide is subjected to interaon with a polyhydric alcohol in a multisectional reaction zone. A monomer and a polyhydric alcohol are introduced into the first section of the reaction zone, the polyhydric alcohol containing a catalyst in the form of a solution of an alkali metal alcoholate with an alkaline content of 1-20 wt. % as calculated for KOH and with a water content in the solution from 0.05 to 0.5 wt. %. The reaction is conducted in such a way that the initial components interact in the first section at a molar ratio of 1-5:1.The proposed method makes it possible to produce polyethers that are uniform with respect to the chemical composition (molecular-weight distribution and distribution according to the types of the functionality) and with minimum impurity content.
    Type: Grant
    Filed: October 2, 1980
    Date of Patent: August 2, 1983
    Assignees: Vsesojuzny Nauchno-Issledovatelsky Institute Sinteticheskikh Smol, VEB Synthesewerk Schwarzheide
    Inventors: Vladimir S. Shtykh, Alexandr A. Evstratov, Vladimir S. Lebedev, Gleb A. Gladkovsky, Viktor S. Kopenin, Ljudmila P. Gladush, Nikolai V. Kia-Oglu, Mark I. Prigozhin, Jury V. Sharikov, Jury F. Petrov, Wolf-Dieter Habicher