Patent ID: 7175883

Claim:
A polysiloxane aol comprising a product of a hydrolysis and condensation process of at least two hydrolyzable silicon compounds, wherein the process comprises subjecting (1) in a first stage (A) at least one silicon compound of the general formula I: (Z o L—) m Si(H) n (R) p (I), which is free of carbamate groups and in which the indices and the variables have the following meanings: o is an integer from 1 to 5; m is 0, 1, 2 or 3; n is an integer from 1 to 4; p is 0, 1, 2 or 3; Z is a reactive functional group, excluding carbamate group; L is an at least divalent, linking, organic group; H is a hydrolyzable, monovalent, organic group or hydrolyzable atom; R is a nonhydrolyzable, monovalent, organic group; wherein m+n+p=4: to partial hydrolysis and condensation in the presence of (B) at least one crosslinking agent, and then subjecting (2) in at least one further stage, the reaction mixture (1) obtained in stage (1) to complete hydrolysis and condensation with (C) at least one hydmlyzable, carbamate-functional silicon compound of the general formula II: {(HR 1 N—(O)C—O—) r L—} s SI(H) t (R) u (II) in which the variables L, H, and R are as defined above and the variable R 1 and the indices have the following meanings: R 1 is a hydrogen atom or group R; r is an integer from 1 to 5; s is 1, 2 or 3; t is 1, 2 or 3; u 0, 1 or 2; wherein s+t+u=4.