Mixtures of .alpha.,.alpha.'-bis-(2-hydroxy-3,5-dialkylphenyl)-p

Details Mixtures of .alpha.,.alpha.'-bis-(2-hydroxy-3,5-dialkylphenyl)-p Mixtures of .alpha.,.alpha.'-bis-(2-hydroxy-3,5-dialkylphenyl)-p

1976-05-20

1978-02-14

Padgett, Benjamin R.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252407, C09K 1508

Patent

active

040737462

ABSTRACT:
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-diisopropylbenzen e 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.

REFERENCES:
patent: 2944086 (1960-07-01), Coffield et al.
patent: 3057928 (1962-10-01), Koblitz et al.
patent: 3778409 (1973-12-01), Oertel

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