process for the production of structurally modified and pyrogenically produced silanized silicas, silicas thus obtained and their use

摘要

"silicas". The present invention relates to structurally modified silanized silicas, which are characterized by fixed groups on the surface, the groups being alkylsilyl (sic ~ n ~ 2 ~ n + 1 ~, with n = 2-18). they are produced by the fact that pyrogenically produced silicas are treated with the silanizing agent and structurally modified. Silicas are used to improve scratch resistance on lacquers.