Polysiloxane sols, a process for their preparation and their use

Polysiloxane sols preparable by DOLLAR A (1) in a first stage DOLLAR A (A) a silicon compound of the general formula I: DOLLAR A (Z¶o¶L-) ¶m¶Si (H) ¶n¶ ( R) ¶p¶ DOLLAR DOLLAR a with a o is an integer from 1 to 5; DOLLAR A m 0, 1, 2 or 3; DOLLAR A n is an integer from 1 to 4; DOLLAR A p 0, 1, 2 or 3; DOLLAR AZ reactive functional group, excluding carbamate group; DOLLAR AL least divalent, linking, organic group; DOLLAR AH hydrolyzable, monovalent, organic group or hydrolyzable atom; DOLLAR AR nonhydrolyzable, monovalent organic group; DOLLAR A in the presence of DOLLAR A (B) partially hydrolyzing a crosslinking agent and condensed, followed by DOLLAR A (2), the reaction mixture in a further step (1) with DOLLAR A (C) a hydrolyzable, carbamate-functional silicon compound of the general formula II: DOLLAR A {[HR · 1 · N- (O) CO-] ¶r¶L-} ¶s¶Si (H) ¶t¶ (R) ¶u¶ DOLLAR DOLLAR A with AR · 1 · hydrogen atom or group R; DOLLAR A r is an integer from 1 to 5; DOLLAR A s 1, 2 or 3; ...