MIXTURE OF ALPHA*ALPHAABIS* *22HYDROXYY3*55DALKYLPHENYL**PPANDDMM DIISOPROPYLBENZENE PROCESS FOR PREPARING SAME AND APPLICATION THEREOF AS STABILIZER

摘要

The invention relates to mixtures of alpha , alpha '-bis-(2-hydroxy-3,5-dialkylphenyl)-m-diisopropylbenzene and alpha , alpha '-bis-(2-hydroxy-3,5-dialkylphenyl)-p-diisopropylbenzene which contain at least 20% by weight and preferably from 40 to 70% by weight of the m-compound. Moreover, the invention relates to a process for the production of such mixtures. The mixtures are suitable for stabilizing polyurethanes and other synthetic polymers against discoloration and degradation when exposed to visible and/or UV light and/or atmospheric constituents such as oxygen oxides or nitrogen and waste gases from combustion. Particularly, they are suitable for stabilizing threads and foils of these products including coatings.