Flexible coating composites having primarily mineral composition

A process for producing a flexible mineral construction material, the process comprising:

• (1) applying a composition on at least one side of a substrate, said composition comprising an inorganic compound comprising:
• at least one metal, semimetal, or both, selected from the group consisting of Sc, Y, Ti, Zr, Nb, V, Cr, Mo, W, Mn, Fe, Co, B, Al, In, Tl, Si, Ge, Sn, Zn, Pb, Sb, Bi, and a mixture thereof;
• and
• at least one element selected from the group consisting of Te, Se, S, O, Sb, As, P, N, C, Ga, and a mixture thereof,
• and drying said composition;
• and then
• (2) applying a first coating on at least one side of the substrate, said first coating comprising:
• a first mixture of silanes comprising a silicon alcoholate and silanes of the formula (Z1)Si(OR)3, wherein:
• Z1 represents R, 3-glycidyloxypropyl, 3-aminopropyl, N-(2-aminoethyl)-3-aminopropyl, or a mixture thereof;
• and
• R independently represents an identical or different alkyl or alicyclic group comprising from 1 to 18 carbon atoms,
• and wherein at least one of said silanes of formula (Z1)Si(OR)3 has Z1═N-(2-aminoethyl)-3-aminopropyl, and the first mixture of silanes comprises the silicon alcoholate, an alkyl silane of formula (Z1)Si(OR)3 in which Z1 represents R, and a glycidyloxypropyl silane of the formula (Z1)Si(OR)3 in which Z1 represents 3-glycidyloxypropyl, such that:
• a molar ratio of the silicon alcoholate to the alkyl silane ranges from 1:1 to 1:0.96;
• and
• a molar ratio of the silicon alcoholate to the glycidyloxypropyl silane ranges from 1:0.57 to 1:1.51;
• at least one oxide particle selected from the group consisting of an oxide of Ti, an oxide of Si, an oxide of Zr, an oxide of Al, an oxide of Y, an oxide of Sn, an oxide of Zn, and oxide of Ce, and mixtures thereof;
• and
• a polymer or initiator,
• and drying the at least first coating, and then
• (3) applying a second coating on the first coating, said second coating comprising a second mixture of silanes comprising a silane of the formula (3-glycidyloxypropyl)Si(OR)3, a silane of the formula (3-aminopropyl)Si(OR)3, and a silane of the formula RSi(OR)3, in which R independently represents an identical or different alkyl or alicyclic group comprising from 1 to 18 carbon atoms, and drying the second coating, and then
• (4) applying at least one organic polymer dispersion (3) to at least one side of the substrate to form at least one third coating, and drying the at least one third coating.