Summary
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1.
The thickening effect of lithium soap in three-component systems (oil-soap-filler) depends on the nature of the filler, the filler concentration, and the nature of the dispersion medium.
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2.
Admixture of a filler (mica, graphite) to a lithium grease thickened with a constant amount of soap increases the limiting strength and the viscosity in proportion to the filler concentration. Admixture of mica to castor-oil grease increases the viscosity and the strength limit more than does admixture of graphite. In greases prepared from cable oil, the effect of these fillers is nearly identical.
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3.
Admixture of up to 10% mica to greases in which the soap-to-oil ratio is kept constant (1∶4) improves the limiting shear strength. A further rise of the filler content to 40% reduces the grease strength. An increase of the graphite concentration gradually lowers the limiting shear strength of the grease. The grease viscosity passes through an extreme as the filler concentration rises.
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Literature cited
I. G. Fuks, V. V. Vainshtok, N. I. Chernozhukov, and B. N. Kartinin, Khim. i tekhn. topliv i masel, No. 7 (1964).
Consistent Greases. Transactions of the Moscow Institute of Petrochemistry and the Gas Industry, Gostoptekhizdat (1960).
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Translated from Khimiya i Tekhnologiya Topliv i Masel, No. 2, pp. 24–26, February, 1966.
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Fuks, I.G., Vainshtok, V.V. & Chernozhukov, N.I. Effect of fillers on the thickening capacity of lithium soaps. Chem Technol Fuels Oils 2, 104–106 (1966). https://doi.org/10.1007/BF00726683
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DOI: https://doi.org/10.1007/BF00726683