ORGANOSTANNIC STABILIZING MIXTURES, THEIR APPLICATION TO THE STABILIZATION OF CHLORINATED THERMOPLASTIC MATERIALS, AND THERMOPLASTIC MATERIALS SO STABILIZED

摘要

The invention relates to the stabilizing mixtures that can be obtained by reacting a mono-organotin trihalogenide of Formula I: RSN (HAL) (I) with an equivalent amount, in relation to the halogen content of this trihalogenide. MIXTURE OF A MERCAPTO-CARBOXYLIC ACID ESTER OF FORMULA II: HS (CH) COOR (II) AND AN ALKALI METAL SULFIDE, IN THE PRESENCE OF AN ALKALI METAL HYDROXIDE, THE MOLAR RATIO OF MERCAPTO CARBOXYL ESTER (II) TO ALKALI METAL SULFIDE IS BETWEEN 97: 3 AND 18:82. IN THE PREFERRED FORMULAS, R DESIGNATES A RADICAL ALKYL, HAL REPRESENTS CL, BR OR I, R REPRESENTS AN ALKYL OR ALKENYL RADICAL AND IS EQUAL TO 1 OR 2. / P P THESE STABILIZING MIXTURES ARE SUITABLE IN PARTICULAR FOR STABILIZATION OF THERMOPLASTIC MATERIAL CONTAINING CHLORINE.