| abstract |
The invention relates to binder compositions, which comprise silica-based aquasols, the silica of which is modified by a metal so as to contain a monolayer or less of a metal such as aluminum, tin, zinc or lead and which are deionized so as to have a pH of between 2.5 and 7.0, as well as a water-soluble polymer such as a polyvinyl alcohol. The invention also describes an adhesive which comprises an aquasol based on silica, a polymer containing an oxygen fraction, as well as clay, the surface of the silica having been modified so as to contain a metal and the aquasol. based on silica having been deionized so as to have a pH of between 2.5 and 7. |