A process for reducing the water-vapor permeability of films or coatings
made from polymer compositions (Q) comprising beeswax or comprising montan
ester wax or comprising mixtures of these, by preparing a composition (Z)
comprising Z.sub.1) from 40 to 98.5% by weight of at least one polymer
compatible with the polymer (Q1) which is the basis of Q, Z.sub.2) from
0.5 to 20% by weight of starch or cellulose or a mixture of these as
compatibilizer, Z.sub.3) from 1 to 20% by weight of beeswax or montan
ester wax or a mixture of these, and Z.sub.4) from 0 to 20% by weight of
at least one additive, where the percentages by weight are based on the
total weight of Z, and in a second step combining the composition Z with
the polymer (Q1) which is the basis of Q.
