Aqueous emulsions containing organosilicon compounds for the impregnation of inorganic materials

An aqueous organosilicon emulsion suitable for the impregnation of inorganic materials, comprising:

• (a) from 1 to 80% by weight of at least one alkoxysilane corresponding to the formula ##STR26## in which R.sub.1 =C.sub.1 -C.sub.3 -alkyl,
• R.sub.3 =C.sub.1 -C.sub.20 - alkyl, straight chain or branched, or phenyl,
• x=H, Cl, Br, I, NH.sub.2, SCN, CN, N.sub.3, NHR, NR.sub.2, .sym.NR.sub.3, --S.sub.x --, aryl or alkenyl,
• a=0 or 1,
• b=1 or 2 and
• x and c stand for an integer from 1 to 6,
• (b) from 1 to 30% by weight of an organosilicon compound corresponding to the formula ##STR27## in which R.sub.2 and R.sub.3, which may be identical or different, denote C.sub.1 -C.sub.20 -alkyl, straight chain or branched, or phenyl,
• R.sub.4 stands for C.sub.1 -C.sub.3 -alkoxy, ##STR28## wherein s=3-50 and t=3-25, R.sub.5 denotes H, C.sub.1 -C.sub.20 -alkyl, C.sub.2 -C.sub.36 -alkenyl,
• C.sub.5 -C.sub.8 -cycloaklyl or C.sub.7 -C.sub.36 -aralkyl
• when p=0 and r=0, OR.sub.5 stands for:
• --(OCH.sub.2 --CH.sub.2).sub.s --(CH.sub.2 --CHO).sub.t (CH.sub.2 --CH.sub.2 O).sub.5 H;
• m=0, 1 or 2 and
• n=0, 1 or 2 on condition that when p=0, then (m+n)=1 or 2 and when P.noteq.0then (m+n)= 0, 1 or 2;
• p=0, 1, 2, or 3 and
• r=an integer with a value from 0 to 50, and
• (c) water for the balance up to 100% by weight.