Fatty ester compositions with improved oxidative stability
AssigneeArkema France
InventorsNicholas Martyak, Michael Gernon, Conor Dowling, Daniel Alford
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Abstract
Compositions containing unsaturated fatty esters may be stabilized against atmospheric oxidation by the addition of an antioxidant package containing a phenolic oxidant and a nonphenolic oxygen scavenger, which may be a hydroxylamine, an amine N-oxide, an oxime, or a nitrone. If an amine N-oxide is used, it may be used with or without a phenolic antioxidant. Compositions treated in this manner show good resistance to atmospheric oxidation and resultant viscosity increase.
Claims22
A composition comprising:
- a) a fatty ester component constituting at least 50 wt % of the composition and comprising an unsaturated fatty ester;
- and
- b) an antioxidant package comprising a phenolic antioxidant or precursor thereof and a nonphenolic oxygen scavenger or precursor thereof;
- wherein the nonphenolic oxygen scavenger or precursor thereof comprises a hydroxylamine, an amine N-oxide, an oxime, a nitrone, or a mixture of any of these.
A composition comprising:
- a) a fatty ester component constituting at least 50 wt % of the composition and comprising an unsaturated fatty ester;
- and
- b) an amine N-oxide.
A method of making a stabilized composition, comprising blending together:
- a) a fatty ester component comprising an unsaturated fatty ester;
- and
- b) an antioxidant package comprising a phenolic antioxidant or precursor thereof and a nonphenolic oxygen scavenger or precursor thereof;
- wherein the nonphenolic oxygen scavenger or precursor thereof comprises a hydroxylamine, an amine N-oxide, an oxime, a nitrone, or a mixture of any of these.
Dependencies are inferred from the claim text.