Compositions – Electrolytes for electrical devices
Patent
1973-05-17
1978-01-03
Gantz, Delbert E.
Compositions
Electrolytes for electrical devices
184 1E, 252 327E, 252 33, 252 515A, 252316, C10M 148
Patent
active
040665593
ABSTRACT:
Addition of oxidation inhibitor (antioxidant) or other additive to lubricating oil as in a working engine is effected by placing into the oil a container, e.g., a polyolefin container or capsule, for example, a polypropylene capsule containing said additive which permeates through the container wall into the oil gradually. A polypropylene capsule containing zinc dialkyldithiophosphate is described. Other container materials and other polyolefin, e.g., polyethylene and copolymers of monoolefins such as ethylene-propylene copolymers can be used. The container or capsule is found to release increasing quantities of additive as the oil temperature surrounding the same increases, with container rupture at extreme operating conditions of temperature to release remaining additives to further protect the oil under such conditions.
REFERENCES:
patent: 2969330 (1961-01-01), Brynko
patent: 2969331 (1961-01-01), Brynko et al.
patent: 3460972 (1969-08-01), Nack
patent: 3505244 (1970-04-01), Cessna
patent: 3669637 (1972-06-01), Klass et al.
Herbig; James A., "Microencapsulation", pp. 436-456, Kirk-Othmer Encyclopedia of Chem. Tech., vol. 13, 2nd Ed., 1967.
Smalheer et al., "Lubricant Additives", 1967, p. 7.
Gantz Delbert E.
Metz Andrew H.
Phillips Petroleum Company
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