Dispersants having antioxidant activity and lubricating composit

Details Dispersants having antioxidant activity and lubricating composit Dispersants having antioxidant activity and lubricating composit

1979-03-19

1981-02-03

Metz, Andrew

Compositions

Electrolytes for electrical devices

252403, 2603265FM, C10M 132

Patent

active

042487250

ABSTRACT:
Lubricating oil additives having both dispersant and antioxidant activity, particularly useful for incorporation in two-stroke petrol engine lubricating oil compositions, are produced when a dispersant having free >N-H groups, e.g. a substituted succinimide is reacted with an aldehyde and a compound having antioxidant activity containing in its molecular structure a group or groups capable of condensing with the aldehyde and >N-H groups present in the dispersant, thereby chemically bonding the compound to the dispersant. Representative antioxidants are mononuclear and polynuclear substituted phenols having at least one unsubstituted ortho- or para-position, e.g. 2,6-di-tert-butyl phenol and secondary aromatic amines. Typical reaction conditions are a temperature in the range 100.degree. to 175.degree. C. and atmospheric pressure.

REFERENCES:
patent: 3036003 (1962-05-01), Verool
patent: 3368972 (1968-02-01), Otto
patent: 3442808 (1969-05-01), Traise et al.
patent: 3454496 (1969-07-01), Schlobohm et al.
patent: 3455832 (1969-07-01), Davis
patent: 3493520 (1970-02-01), Verool et al.
patent: 3634248 (1972-01-01), Andress, Jr.
patent: 3798165 (1974-03-01), Piasek et al.
patent: 4066559 (1978-01-01), Rohde

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