Patents Assigned to Armienes
  • Process for the preparation of monolithic silica aerogels
    Patent number: 5795557
    Abstract: A process for the preparation of a silica aerogel that includes subjecting a mixture that includes an organosilicon compound and ethyl acetoacetate to hydrolysis and polycondensation in an acidic medium to obtain a transparent gel. The organic solvent is substituted by liquid carbon dioxide and the carbon dioxide is evacuated under supercritical conditions of the carbon dioxide to obtain an aerogel.
    Type: Grant
    Filed: July 3, 1996
    Date of Patent: August 18, 1998
    Assignees: Universite Claude Bernard, Produits Chimiques Auxiliares, Armienes, Centre Scientifique et Technque Du Batiment
    Inventors: Gerard Pajonk, Elimame Elaloui, Redouane Begag, Marcel Durant, Bruno Chevalier, Jean-Luc Chevalier, Patrick Achard