| abstract |
They are used as antioxidizing of organic polymers benzofuran-2-onic and/or indolin-2-onic compounds which present in the position 3, either at least one hydrogen atom, or an organic remains bound by a double binding to the rest of the molecule, and/or optionally substituted bis-3-benzofuran-2-onic compounds and/or optionally substituted bis-3-indolin-2-onic compounds. These compounds having the following characteristics: (i) The benzofuran-2(3H)-onic compounds unsubstituted in the position 3 having in the position 5 no hydroxyl esterically inhibited by a tert. butyl group; (ii) the indolin-2-onic compounds, in as much as in these compounds the nitrogen atom (1-) is bound to a hydrogen atom or to an alkyl or aralkyl group and only the position 3 has an additional substituent, wherein this additional substituent has no acetamidic structure; (iii) the polymer organic material being substantially free of halogen when 3- acyl-benzofuran-2-onic compounds are used. The invention relates also to polymer materials stabilized in this manner. New benzofuran-2-onic and indolin-2-onic compounds are disclosed which present in the molecule thereof at least two benzofuran-2-onic and indolin-2-onic cores; These cores are connected either directly in their position 5, or bridged by means of an organic remains in position 3-. 5- or 7. |