Patent ID: 8309476

Claim:
A process for the preparation of sol-based water-dilutable concentrates by mixing the following components: (A) from 0.5 to 25% by weight of an organosol obtainable by the hydrolysis and condensation of one or more trialkoxysilanes and/or dialkoxysilanes of general formula I R 4-x Si(OR′) x (I) wherein R represents the same or different optionally substituted hydrocarbon groups with from 1 to 22 carbon atoms which are bonded to the silicon atom through a carbon atom, optionally interrupted by oxygen, sulfur, nitrogen or the group NR″, with R″ being hydrogen or C 1 to C 14 alkyl; the radicals R′ are the same or different and each represent an optionally substituted hydrocarbon group with from 1 to 8 carbon atoms, optionally interrupted by oxygen, sulfur, nitrogen or the group NR″ with the meaning mentioned above; and x is 2 or 3; (B) from 4 to 55% by weight of one or more alkoxides of general formula II Me(OR′) n (II) wherein Me represents Ti, Zr, Hf or Al, n is the valence of the metal cation, and R′ has the meaning mentioned above; (C) from 0.1 to 15% by weight of one or more complexing agents for reducing the hydrolysis rate of components (A) and (B); and (D) from 5 to 95% by weight of a water-compatible or water-miscible solvent having a boiling point of at least 150° C.; respectively based on 100% by weight of components (A), (B), (C) and (D), followed by removing alcohols having a boiling point of up to 150° C. are removed by distillation to adjust the flash point, and water is optionally added.