Abstract of the Disclosure Stabilizer combination for Ca/Zn- stabilized PVC molding materials, containing (a) Ca salts of saturated, straight- chain C.sub.8 -C.sub.34 fatty acids, (b) Zn salts of saturated, straight- chain or branched C.sub.8 -C.sub.22 fatty acids, (c) epoxidized glycerides of unsaturated, straight-chain C.sub.16 -C.sub.22 fatty acids having an oxirane number of 6 to 8 and iodine number less than 5, and (d) ketofatty acid glycerides of general formula R.sup.1 COO--CH.sub.2 -(R. sup.2 COO)CH-CH.sub.2 -OCR.sub.3, in which the groups R.sup.1 COO--, R. sup.2 COO--, and R.sup.3 COO-- stand for residues of ketofatty acids with 16 to 22 carbon atoms and optionally residues of fatty acids with 12 to 22 carbon atoms, and 60 to 100 wt.% of the groups are derived from the ketofatty acids and 40 to 0 wt.% from the fatty acids, with a ratio of the total weight of calcium salts of component (a) and zinc salts of component (b) to the percentage by weight of the ketofatty acid glycerides of components (d) in the range 1:1 to 1:50, result in favorable transparency values of the PVC molding materials stabilized with them.
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