Substituted malonic acid derivatives and their use as stabilizer

Details Substituted malonic acid derivatives and their use as stabilizer Substituted malonic acid derivatives and their use as stabilizer

1977-12-15

1980-04-15

Taylor, Hosea E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

106176, 252403, 260 4585B, 546 16, 546188, 546190, C07D40112, C08K 534

Patent

active

041983343

ABSTRACT:
Esters and amides from 4-hydroxy-and 4-amino-polyalkylpiperidines and hydroxybenzylmalonic acids substituted at the central carbon atom with an organic residue, preferably alkyl-, esteralkyl- or phosphonoalkyl-groups, are excellent stabilizers for organic polymers, especially for polyolefins. They protect the polymers as well against light degradation as against thermo-oxidative degradation. The compounds can be prepared by hydroxybenzylation of the corresponding derivatives of substituted malonic acids. Bis-malonic acid derivatives may be obtained from the monomalonics by reaction with formaldehyde.

REFERENCES:
patent: 3993655 (1976-11-01), Rasberger et al.
patent: 4021432 (1977-05-01), Holt et al.

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