Patents Represented by Law Firm Nixon & Vanderhye Nixon & Vanderhye
  • Process for preparation of organopolysiloxanes
    Patent number: 5130399
    Abstract: The present process for producing an organopolysiloxane is characterized in that the polymerization of an organosiloxane by using an alkali catalyst is carried out in the presence of a reversible dehydrating agent such as magnesium sulfate and calcium carbonate or an irreversible dehydrating agent such as calcium oxide. According to this manufacturing process, there is a quite distinct mutual relation between the preset composition of the organopolysiloxane to be manufactured and the viscosity of the actually manufactured organopolysiloxane.
    Type: Grant
    Filed: May 20, 1991
    Date of Patent: July 14, 1992
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Masayuki Ikeno, Hiroyasu Hara