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Abstract

The present invention relates to use of an aqueous polymer composition containing a water-soluble or water-dispersible polymer P made of polymerized ethylenically unsaturated monomers M comprising.

30 to 90 wt.-%, based on the total weight of monomers M, of at least one monomer M1 selected from C1-C12-alkyl esters of monoethylenically unsaturated carboxylic acids, C6-C10-cycloalkyl esters of monoethylenically unsaturated carboxylic acids and monovinylaromatic hydrocarbon monomers,5 to 30 wt.-%, based on the total weight of monomers M, of at least one monomer M2 selected from monoethylenically unsaturated monomers containing at least one acid group, and5 to 40 wt.-%, based on the total weight of monomers M, of at least one monomer M3 different from M2 which has a reactive functional group being capable of being crosslinked,wherein the total weight of monomers M1, M2 and M3 corresponds to at least 90% of the total weight of monomers M;wherein the monomers M are selected such that the theoretical glass transition temperature according to Fox (Tgt) of the polymer P is at most 80° C.; andwherein the polymer P is dissolved or dispersed in an aqueous phase such that the acid groups of the polymer P are totally or partially neutralized; as a staining composition for porous materials.

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First Claim