| 摘要 |
A composition, suitable for stabilizing a polymeric composition against the effects of light, comprising a) an N-acylated 2,2,6,6-tetraalkylpiperidinyl group (hereinafter N-acylated HALS) containing compound; and b) an N-oxy-subst. 2,2,6,6-tetraalkylpiperidinyl group (hereinafter N-oxy-substituted HALS) containing compound. A further aspect of the invention relates to a composition, suitable for stabilizing a polymeric composition against the effects of light, comprising a) an N-acylated 2,2,6,6-tetraalkylpiperidinyl-group-containing compound in which a spiro group is attached in the 4-position (hereinafter defined as component i); and b) an N-acylated 2,2,6,6-tetraalkylpiperidinyl-group-containing compound in which in the 4-position no spiro group is present (hereinafter defined as component ii). These compounds are suitable as light stabilizers in acid catalyzed lacquer system.
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