Synergistic mixture of low-molecular and high-molecular polyalkylpiperidines
AssigneeCiba-Geigy Corporation
InventorFrancois Gugumus
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Abstract
Low-molecular and high-molecular polyalkylpiperidines are suitable as a synergistic mixture for stabilizing organic material, in particular organic polymers. The compounds are substances known per se. Thus, for example, the mixture of ##STR1## is distinguished by a pronounced synergism.
Claims6
A stabiliser system consisting essentially of (A) a low-molecular, sterically hindered polyalkylpiperidine selected from the compounds of the formulae ##STR6## in which R.sub.1 is a group of the formula ##STR7## and R.sub.2 is a group of the formula ##STR8## and (B) a high-molecular, sterically hindered polyalkylpiperidine selected from the compounds of formulae ##STR9## wherein R.sub.1 is as defined above, said components being present in a weight ratio of 5:1 to 1:5.
Dependencies are inferred from the claim text.