Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1976-11-26
1978-10-24
Miller, Edward A.
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
252400R, 260 4575R, 260 4575C, 260 4575F, 260 4575G, 260 4575M, 260 4575N, 260 4575P, C09K 1502, C09K 1518, C09K 1518, C08K 310
Patent
active
041220331
ABSTRACT:
A method for stabilizing organic materials against autoxidation, a composition useful therefor and organic compositions containing the autoxidation stabilizers. The method comprises the steps of adding a compound capable of reducing the peroxide content and a transition metal containing compound to an organic material and thereafter recovering a stabilized composition. The components of the inhibitor may be added separately or simultaneously and the same may be added directly to the organic material or first combined in a concentrated solution and then added to the organic material. The basic and neutral primary, secondary and tertiary amines have been found particularly effective in reducing the peroxide content. Also, the transition metal salts containing cations which easily change valence by a single electron are the most effective transition metal salts. The inhibitor combination is effective in both liquid and solid compositions. The inhibitor combination is particularly effective in both natural and synthetic lubricating oil compositions, grease compositions, polymers and the like. When used at the most effective relative and actual concentrations, the inhibitor combination will yield stability comparable to that exhibited by conventional oxidation inhibitors even though one component is a known oxidation catalyst.
REFERENCES:
patent: 3320167 (1967-05-01), Knowles et al.
patent: 3412028 (1968-11-01), Godfrey
patent: 3422014 (1969-01-01), Forbes et al.
patent: 3459703 (1969-08-01), Briggs et al.
patent: 3661843 (1972-05-01), Hechenbleikner
patent: 4008200 (1977-02-01), Avar et al.
Gluck Irwin
Miller Edward A.
Zagarella, Jr. Eugene
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