| 摘要 |
Proposed is a processing additive for halogen-containing polymers, in particular for polyvinyl chloride, with a content of a synthetic, crystalline, finely particulate alkali metal alumo silicate containing 13 to 25 percent by weight of bound water, which-in its anhydrous form-is of the composition (0.7-1.1) Me2O.Al2O3x(1.3-2.4) SiO2, Me standing for an alkali metal, wherein the alkali metal alumo silicate is present in combination with at least one isocyanuric acid derivative of the formula <IMAGE> I wherein each n stands for an integer from 0 to 5, preferably from 0 to 3, each X represents H or a straight or branched alkyl group having 1 to 6 carbon atoms, preferably 1 or 2 carbon atoms, and each R is -OH or -COOH, and wherein the n's, X's and/or R's preferably have the same meaning, as well as halogen-containing polymers stabilized with use of this combination.
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