| abstract |
Described are aqueous solutions of modified silicates, these solutions are free of organic solvents, obtainable by that (A) an aqueous solution of silicates following the general formula M 2 O • nSiO 2 follows, where M is a cation from the group Li + , Na + , K + , NY 4 + wherein Y is an H atom and / or an alkyl or alkenyl radical having 1 to 22 carbon atoms, with (b) at least one silane of the general formula (i) R- (CH 2 ) n Si- (X) 3 (i) each X is independently a CH 3 , OCH 3 , OC 2 H 5 , OC 3 H 7 , OCOCH 3 , H or Cl radical and R is a saturated or unsaturated, linear or branched or cyclic radical containing at least one O and / or N-atom and at least 2 C-atoms, and n is a number between 1 and 3, at temperatures of 5 to 100 ° C to the reaction, and then removed the resulting alcohols in the reaction. |