Stabilized synthetic polymers

Details Stabilized synthetic polymers Stabilized synthetic polymers

1978-06-13

1980-09-09

Hoke, V. P.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C08K 534

Patent

active

042217016

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: 3721704 (1973-03-01), Dexter
patent: 3992390 (1976-11-01), Holt et al.

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