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US 4,007,159 AGranted
Organic substrates stabilized by nitroalkane based hindered phenol compounds
AssigneeFMC Corporation
InventorHarry Dounchis
Life of this patent
Estimating the term…
Abstract
Organic substrates stabilized against oxidative deterioration by the use of high molecular weight hindered phenols based on the condensation of a nitroalkane with either a dialkyldithiocarbonate or with formaldehyde and a di-t-butylphenol or a substituted derivative of a di-t-butylphenol.
Claims10
Stabilized compositions comprising an organic material normally susceptible to oxidative deterioration containing per 100 parts of said organic material from about 0.001 to 5 parts by weight of a stabilizing antioxidant compound selected from the group having the formulas:
- ##STR9## wherein Ar represents a 3,5-di-tertiary-butyl-4-hydroxybenzyl radical, R.sub.1 and R.sub.2 each may represent hydrogen, a lower C.sub.1 -C.sub.4 alkyl radical or an Ar radical, and ##STR10## wherein Ar is as previously described and R.sub.3 represents a lower C.sub.1 -C.sub.4 alkyl or a methoxy or ethoxy substituted lower C.sub.1 -C.sub.4 alkyl radical.
Dependencies are inferred from the claim text.