Stabilizers for synthetic polymers

Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal

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260 458R, 260 458N, C07D40112

Patent

active

039936554

ABSTRACT:
Esters of 2,2,6,6-tetramethylpiperidinols with mono- or bis-hydroxybenzylmalonic acids are powerful stabilizers for organic polymers, especially for polyolefins. They protect the polymers against thermal-oxidative degradation as well as against light-induced aging. Similar activity show the corresponding amides of hydroxybenzylmalonic acids. The esters and the amides can be prepared by analogous processes.

REFERENCES:
patent: 3640928 (1972-02-01), Murayama et al.
patent: 3840494 (1974-10-01), Murayama et al.

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