Aqueous dispersions entirely or substantially free from volatile organic
compounds, comprising
- (A) at least one block copolymer preparable by two-stage or multistage
free-radical copolymerization in an aqueous medium of
- a) at least one olefinically unsaturated monomer selected from the
group consisting of hydrophilic and hydrophobic olefinically unsaturated monomers, and
- b) at least one olefinically unsaturated monomer different than
the olefinically unsaturated monomer (a) and of the general formula I
in which the radicals R1, R2, R3 and R4
each independently of one another are hydrogen atoms or substituted or unsubstituted
alkyl, cycloalkyl, alkylcycloalkyl, cycloalkylalkyl, aryl, alkylaryl, cycloalkylaryl,
arylalkyl or arylcycloalkyl radicals, with the proviso that at least two of the
variables R1, R2, R3 and R4 are substituted
or unsubstituted aryl, arylalkyl or arylcycloalkyl radicals, especially substituted
or unsubstituted aryl radicals;
- and
- (B) hydrophilic nanoparticles;
- processes for preparing them, and their use as or to prepare
coating materials, adhesives, and sealing compounds.
|
|
|
