Aqueous silane systems based on tris(alkoxysilylalkyl)amines and the use thereof

A process for preparing a composition, comprising hydrolysing in the presence of water at least one selected from the group consisting of:

• at least one tris-silylated aminoalkoxysilane of formula (IX)
• N[ZSi(R12)Ω(OR1)3-Ω]3 (IX)
• wherein
• Z is independently a bivalent alkylene radical, R12 is a linear, branched or cyclic alkyl radical having 1 to 24 carbon atoms, and Ω is independently 0 or 1;
• at least one bisaminoalkoxysilane of formula (II)
• (OR1)3-Δ(R11)ΔSi-A—Si(R11)Δ(OR1)3-Δ (II)
• wherein
• A is a bisamino-functional group of formula (III)
• —(CH2)i—[NH(CH2)f]gNH[(CH2)f*NH]g*—(CH2)i*— (III)
• i, i*, f, g and g* are the same or different,
• i and/or i*=0 to 8,
• f and/or f*=1, 2 or 3,
• g and/or g*=0, 1 or 2,
• R11 is a linear, branched or cyclic alkyl radical having 1 to 24 carbon atoms or an aryl radical,
• Δ=0 or 1;
• at least one aminoalkylalkoxysilane of formula (IV)
• B—Si(R3)x(OR1)3-x (IV)
• wherein
• x=0 or 1,
• R3 is a linear, branched and/or cyclic alkyl radical having 1 to 24 carbon atoms,
• B is one of the amino-functional groups of formula Va or Vb
• R10h*NH(2-h*)[(CH2)h(NH)]j[(CH2)l(NH)]n—(CH2)k— (Va)
• wherein
• 0≦h≦6,
• h*=0, 1 or 2,
• j=0, 1 or 2,
• 0≦l≦6,
• n=0, 1 or 2,
• 0≦k≦6, and
• R10 is a benzyl, aryl, vinyl, formyl radical and/or a linear, branched and/or cyclic alkyl radical having 1 to 8 carbon atoms, or
• [NH2(CH2)m]2N(CH2)p— (Vb)
• wherein
• 0m≦6, and
• 0≦p≦6;
• at least one alkylalkoxysilane of formula (VI)
• C—Si(R5)y(OR1)3-y (VI)
• wherein
• y=0 or 1,
• C is a linear, branched or cyclic alkyl radical having 1 to 20 carbon atoms,
• R5 is independently a linear, branched or cyclic alkyl radical having 1 to 24 carbon atoms or an aryl radical;
• at least one epoxy or ether alkoxysilane of the formula (VII)
• D-Si(R7)u(OR1)3-u (VII)
• wherein
• u=0 or 1,
• D is a 3-glycidoxyalkyl, 3-glycidoxypropyl, epoxyalkyl, epoxycycloalkyl, polyalkylglycolalkyl or a polyalkylglycol-3-propyl radical,
• R7 is a linear, branched or cyclic alkyl radical having 1 to 24 carbon atoms or an aryl radical;
• at least one organofunctional alkoxysilane of formula (VIII)
• E-Si(R8)v(OR1)3-v (VIII)
• wherein
• v=0 or 1, R8 is a linear, branched or cyclic alkyl radical having 1 to 4 carbon atoms,
• E is an R8*—Ym—(CH2)s— radical, R8* is a mono-, oligo- or perfluorinated alkyl radical having 1 to 9 carbon atoms or a mono-, oligo- or perfluorinated aryl radical, Y is a CH2—, O—, aryl or S radical and m=0 or 1 and s=0 or 2, or a vinyl, allyl, isopropenyl radical, mercaptoalkyl radical, sulphanealkyl radical, ureidoalkyl radical, an acryloyloxyalkyl radical or a linear, branched or cyclic alkoxy radical having 1 to 24 carbon atoms;
• and a mixture of at least two of the abovementioned alkoxysilanes or hydrolysis and/or condensation products thereof,
• wherein
• R1, in each case independently, in the Formulae IX, II, IV, VI, VII and/or VIII is a linear, cyclic and/or branched alkyl radical having 1 to 24 carbon atoms, and
• the hydrolysis optionally occurs in the presence of an acid, and optionally with initial charging and/or addition of alcohol and/or of a catalyst, and essentially removing the alcohol,
• wherein the process includes hydrolyzing at least one tris-silylated amino alkylalkoxysilane of formula IX and an alkylalkoxysilane of the general formula VI.