Patents Assigned to Laporte Industries Ltd.
  • Method of treating inorganic oxide pigments
    Patent number: 4224080
    Abstract: Inorganic oxides pigments, coated with alumina are treated with water soluble hydroxy acids or salts for example sodium citrate, and with water soluble di- or polyhydric alcohols, for example pentaerythritol, or with a water soluble reaction product of excess di- or polybasic organic hydroxy acids with di- or polyhydric alcohol. Titanium dioxide pigment so treated may be used in both emulsion paint and in organic based paint systems.
    Type: Grant
    Filed: October 10, 1978
    Date of Patent: September 23, 1980
    Assignee: Laporte Industries Ltd.
    Inventors: Hubert H. Chambers, Brian J. Tear