Patent ID: 7399487

Claim:
An aqueous dispersion comprising: A) uncoated or hydrophilically coated microfine metal oxide particles; and B) at least one compound of general formula (Ia) or (Ib) in which M is hydrogen, a monovalent or divalent metal cation, or an ammonium ion; a is 1, or where M is a divalent metal cation, a is ½; X is OM a or —O—(C p H 2p O) q —R 1 where R 1 =H, an aliphatic hydrocarbon radical having 1-20 carbon atoms, a cycloaliphatic hydrocarbon radical having 5 to 8 carbon atoms, an optionally substituted aryl radical having 6 to 14 carbon atoms, p=2to4,q=0 to 100, —NHR 2 and/or NR 2 2 where R 2 =R 1 or —CO—NH 2 ; Y is O, or NR 2 ; A 1 is an ethylene radical, a propylene radical, an isopropylene radical, or a butylene radical; m is 10 to 30; n is 0 to 50; and k is 10 to 30, where the sum m +k is in the range from 20 to 60.