| 摘要 |
A stabilizer mixture containing A) either (A1) at least one compound of the formula in which R<SUB>1 </SUB>is for example hydrogen or C<SUB>1</SUB>-C<SUB>8</SUB>alkyl; R<SUB>2</SUB>, R<SUB>3</SUB>, R<SUB>5 </SUB>and R<SUB>6 </SUB>are for example hydrogen, C<SUB>1</SUB>-C<SUB>30</SUB>alkyl or phenyl; R<SUB>4 </SUB>is for example C<SUB>1</SUB>-C<SUB>30</SUB>alkyl or 2,2,6,6-tetramethyl-4-piperidyl; and n<SUB>1 </SUB>is a number from 1 to 50; or (A2) at least one compound of the formulae wherein n<SUB>2 </SUB>and n<SUB>2</SUB>* are a number from 2 to 50; B) magnesium oxide, magnesium hydroxide, zinc oxide, zinc hydroxide or an organic salt of zinc or magnesium; and C) either (C1) an UV absorber or (C2) a pigment or (C3) an UV absorber and a pigment; with the proviso that, when component A) is at least one compound of the formulae (IIIa) and (IIIb), component B) is magnesium oxide, magnesium hydroxide or an organic salt of zinc or magnesium. Such a stabilizer mixture is particularly useful for stabilizing a polyolefin against light-induced degradation. |
