Functionalized copolymers hydrophobicized with silicones, in the form of
aqueous dispersions or water-redispersible powders are prepared by
copolymerizing
a) from 60 to 99.89% by weight of one or more monomers selected from the
group consisting of vinyl esters of optionally branched C.sub.1-15
alkylcarboxylic acids, methacrylates and acrylates of C.sub.1-15 alcohols,
vinylaromatics, olefins, dienes, and vinyl halides,
b) from 0.01 to 30% by weight of one or more silicones with from 10 to
1,000 SiO(C.sub.n H.sub.2n+1).sub.2 repeat units where n is from 1 to 6,
and where from 90 to 100% by weight of the silicones b) contain at least
one but not more than two polymerizable groups,
c) from 0.05 to 5.0% by weight of one or more hydrolyzable silane monomers
selected from the group consisting of ethylenically unsaturated
hydrolyzable silicon compounds, and hydrolyzable epoxysilanes,
aminosilanes and mercaptosilanes, and
d) from 0.05 to 5.0% by weight of one or more monomers selected from the
group consisting of ethylenically unsaturated epoxy compounds.
The copolymers may be used as binders for paints and coatings with high wet
abrasion resistance.
