| abstract |
Silanized structurally modified pyrogenically produced silicas, characterized by groups fixed on the surface, the groups being dimethylsilyl and / or monomethylsilyl, are produced by treating pyrogenically produced silica in a known way with dimethyldichlorosilane and / or monomethyltrichlorosilane, the groups dimethylsilyl and / or Monomethylsilyl are fixed on the surface of the pyrogenic silica, then structurally modified and optionally re-ground. They are used to improve scratch resistance in paints. |