Plasters and Renders and Paints, Copolymer Dispersions and Their Use

A composition containing

• a) mineral filler, the mean diameter of the particles being from 1 to 40 μm,
• b) pigment,
• c) colloidal silica and
• d) aqueous plastics dispersion which contains a copolymer which is prepared by emulsion polymerization and is derived from
• A) at least 40% by weight, based on the total amount of monomer, of esters of α,β-unsaturated carboxylic acids, vinyl esters of saturated carboxylic acids, vinylaromatic monomers or combinations of two or more of these monomers,
• B) from 0.1 to 10% by weight, based on the total amount of monomers, of α,β-ethylenically unsaturated mono- and/or dicarboxylic acids and/or of α,β-ethylenically unsaturated sulfonic acids and/or of α,β-ethylenically unsaturated phosphoric acids and/or of α,β-ethylenically unsaturated phosphonic acids and/or of amides of α,β-ethylenically unsaturated mono- and/or dicarboxylic acids,
• C) from 0.5 to 15% by weight, based on the total amount of monomers, of ethylenically unsaturated monomers which have at least one alkoxysilyl group,
• D) from 0.1 to 10% by weight, based on the total amount of monomers, of an ethylenically unsaturated surface-active monomer containing at least one anionic and/or nonionic emulsifying group and
• E) optionally up to 20% by weight, based on the total amount of monomers, of other monomers copolymerizable with the monomers of groups A), B), C) and D), with the proviso that,
• instead of or in addition to the copolymerization of the monomer C), from 0.5 to 15% by weight, based on the total amount of monomers, of a monomer which has at least one amino, mercapto or epoxide group in addition to at least one alkoxysilyl group is added after the emulsion polymerization.

Aqueous plastics dispersion containing

• a) a copolymer which is prepared by emulsion polymerization and is derived from
• A) at least 40% by weight, based on the total amount of monomers, of vinyl esters of saturated carboxylic acids, optionally vinylaromatic monomers and/or optionally esters of α,β-unsaturated carboxylic acids,
• B) from 0.1 to 10% by weight, based on the total amount of monomers, of α,β-ethylenically unsaturated mono- and/or dicarboxylic acids and/or of α,β-ethylenically unsaturated sulfonic acids and/or of α,β-ethylenically unsaturated phosphoric acids and/or of α,β-ethylenically unsaturated phosphonic acids and/or of amides of α,β-ethylenically unsaturated mono- and/or dicarboxylic acids,
• C) from 0.5 to 15% by weight, based on the total amount of monomers, of ethylenically unsaturated monomers which have at least one alkoxysilyl group,
• D) optionally up to 10% by weight, based on the total amount of monomers, of an ethylenically unsaturated monomer which contains an anionic and/or nonionic emulsifying group and
• E) optionally up to 20% by weight, based on the total amount of monomers, of other monomers copolymerizable with the monomers of groups A), B), C) and optionally D), with the proviso that,
• instead of or in addition to the copolymerization of the monomer C), from 0.5 to 15% by weight, based on the total amount of monomers, of a monomer which has at least one amino, mercapto or epoxide group in addition to at least one alkoxysilyl group is added after the emulsion polymerization, and
• b) colloidal silica.