Patent ID: 8741038

Claim:
A fluorine-free composition, comprising: (A) a hydrophobizing active substance comprising a mixture of at least one alkyl-substituted silane of the general formula I, at least one a linear, cyclic or branched oligomeric siloxane of idealized formula II and at least one an alkyl silicate of idealized formula III: wherein each R 1 independently represents a C 1 -C 18 -alkyl group; each R 2 independently represents a hydrogen atom or an alkyl radical having from 1 to 6 carbon atoms; each R 3 independently represents a C 1 -C 18 -alkyl group which may optionally comprise substituents having one or more heteroatoms selected from the group consisting of N, O, Cl, P and S; each R 4 independently represents a hydrogen atom or an alkyl radical having from 1 to 6 carbon atoms; (n+m) represents an average degree of oligomerization with a value of from 2 to 50, wherein the average molar mass of the linear, cyclic or branched oligomeric siloxane of idealized formula II is from 300 to 10 000 g/mol; and o is a number from 0 to 50; and (B) from 0.01 to 10% by weight of at least one hydrophobic metal oxide.