Use of epoxypolysiloxanes modified with oxyalkylene ether groups as a curable coating agent

A curable preparation comprising

• (a) between about 90.00 to 99.99% by weight of a curable organopolysiloxane with epoxy groups and
• (b) between about 0.01 to 10% by weight of a curing agent capable of curing epoxy groups, wherein the organopolysiloxane has the average formula ##STR30## wherein R.sup.1 is the same or different in the molecule and represents an alkyl group with 1 to 4 carbon atoms, with the proviso that at least 90% of the R.sup.1 groups are methyl groups
• R.sup.2 is selected from
• (a) an alkyl group with 1 to 20 carbon atoms, an aryl group or aralkyl group,
• (b) an epoxy group linked by way of an Si--C bond to a silicon atom of the organopolysiloxane, or
• (c) a group of the formula
• (--O--((C.sub.n H.sub.2n O--).sub.x).sub.y).sub.z)R.sup.3 --O--((C.sub.n H.sub.2n O--).sub.x).sub.y H
• wherein
• R.sup.3 is a divalent alkylene group with 2 to 11 carbon atoms,
• z is 0 or 1
• y is 0 or 1
• z+y is 1 or 2
• n has an average value of 2 to 3 in the average molecule, the absolute value of n being 2, 3 or 4 and
• x has a value of 1 to 200,
• a has a value of 1 to 1,000 and
• b has a value of 0 to 10,
• with the proviso that at least one R.sup.2 group is selected from b) and at least one R.sup.2 is selected from c) in the average organopolysiloxane molecule.