Graft polymers with improved surface gloss

A mixture consisting essentially of:

• A) ABS graft polymer;
• and
• B) 0.05 to 2% by weight, based on weight of mixture, of a polyether- or polyester-grafted silicone molecules of the formula ##STR11## R.sup.1 is an alkyl group containing 1 to 30 carbon atoms, up to 20% by weight of these alkyl groups being replaceable by phenyl and/or phenyl-alkenyl groups which may be substituted by one or more methyl groups, the alkenyl groups containing 1 to 3 carbon atoms,
• A is --CH.sub.3 or R.sup.2 --Z--,
• B is --CH.sub.3 or R.sup.2 --Z--,
• R.sup.2 is a polyether unit or a polyester unit with an average molecular weight of 200 to 3000,
• Z is a difunctional group which joins the silicon atom to the group R.sup.2,
• X is a number of 3 to 250,
• Y is a number of 0 to 50,
• the average molecule containing at least one group R.sup.2 --Z-- and the ratio of the number of groups R.sup.2 --Z-- to the number x being 1:2 to 1.40.