Patents Assigned to Nauchno-Proizvodstvennoe Obiedinenie Po Abrazivam
  • Moulding composition to produce abrasive tooling
    Patent number: 4968327
    Abstract: The composition is formulated as follows, in percent by weight:synthetic corundum material: 76.5 to 90.0kaolinite: 2.1 to 5.7feldspar: 2.8 to 7.6adhesive and moistening ingredient: 3.0 to 4.5calcium borosilicate frit: 2.1 to 5.7Calcium borosilicate frit compositon, in percent by weight, is as follows:silicon oxide: 22.0 to 38.0aluminium oxide: 14.5 to 15.5boron oxide: 25.0 to 35.0calcium oxide: 12.5 to 17.5sodium oxide: 4.0 to 7.5potassium oxide: 2.0 to 3.5The boron oxide-to-calcium oxide ratio is within 1.5 to 2.5.
    Type: Grant
    Filed: April 6, 1989
    Date of Patent: November 6, 1990
    Assignee: Nauchno-Proizvodstvennoe Obiedinenie Po Abrazivam
    Inventors: Mikhail G. Efros, Zoya M. Prozorova, Svetlana M. Fedotova, Vadim S. Burov, Vyacheslav M. Kolomazin, Grigory I. Lemesh