| abstract |
A stabilizing combination is described, mainly for PVC, which comprises: A) at least one compound of formula I: wherein R * 1 and R * 2 are each independently of the other, alkyl of 1 to 12 carbon atoms, alkenyl of 3 to 6 carbon atoms, cycloalkyl of 5 to 8 carbon atoms that is unsubstituted or substituted by 1 to 3 alkyl groups of 1 to 4 carbon atoms, alkoxy of 1 to 4 carbon atoms, cycloalkyl of 5 to 8 carbon atoms, or hydroxy, or chlorine atoms, or phenylalkyl of 7 to 9 carbon atoms that is unsubstituted or substituted in the phenyl ring by 1 to 3 alkyl groups of 1 to 4 carbon atoms, alkoxy of 1 to 4 carbon atoms, cycloalkyl of 5 to 8 carbon atoms, or hydroxy, or chlorine atoms, and R * 1 and R2 * may additionally be hydrogen and alkyl of 1 to 12 carbon atoms and Y is S or O, and B ) at least one compound from the following groups: B1) perchlorate compounds, B2) glycidyl compounds , B3) beta-diketones and beta-ketoesters, B4) dihydropyridines and polydihydropyridines, B5) polyols and disaccharide alcohols, B6) sterically hindered amines (tetraalkylpiperidine compounds), B7) alkali aluminosilicates (zeolites), B8) hydrotalcites, alkali aluminocarbonates (dawsonites), B10) carboxylates, (bi) carbonates, or alkali (or alkaline earth) hydroxides, B11) antioxidants and lubricants, and B12) organotin stabilizers. |