Patent ID: 7803871

Claim:
An aqueous dispersion, comprising (A) at least one swellable polymer and/or oligomer containing at least one functional group that is at least one of an anionic functional group, a potentially anionic functional group, and/or a nonionic hydrophilic functional group, (B) surface-modified, cationically stabilized, inorganic nanoparticles of at least one kind, wherein the nanoparticles are modified with at least one compound of the general formula I: [(S-) o -L-] m M(R) n (H) p (I) in which the indices and variables have the following meanings: S is a reactive functional group; L is an at least divalent organic linking group; H is a hydrolyzable monovalent group or a hydrolyzable atom; M is a divalent to hexavalent main group or transition group metal; R is a monovalent organic radical; o is an integer from 1 to 5; m+n+p is an integer from 2 to 6; p is an integer from 1 to 6; and m and n are zero or an integer from 1 to 5, (C) at least one compound selected from the group consisting of amphiphiles and organic compounds which are capable of forming chelate ligands, and (D) at least one crosslinking agent, wherein the aqueous dispersion has a pH of from 2 to 7 and the compound of the general formula I, (C), and (D) are each different.