| abstract |
Process for the preparation of a silylated silica, whereinnthe silica with an n n Organosiloxane composed of A units of the formula (I) (R 1 3 SiO 1.2 ) and B units of the formulas (IIa-c) (R 1 2 SiO 2.2 ) and or (R 1 SiO 3/2, . and or (SiO 4.2 ) is silylated, wherein the organosiloxane of Si atoms can contain 1 or 2 bound groups -X, and X = OZ, where Z is a monovalent alkyl radical having 1-4 C atoms, or Z = hydrogen, or X is a halogen, or X is an acetoxy group, R 1 is an optionally mono- or polyunsaturated, monovalent, optionally halogenated, Hydrocarbon radical having 1 to 18 carbon atoms, and may be the same or different, wherein the organosiloxane may have the groups ≡SiX or = SiX 2 in a number C, and for A, B and C applies: 1 ≤ B ≤ 100 or 750 <B <10000 B ≥ A + C and for A + C = 0, 10 ≤ B ≤ 100 or 750 <B <10000 |