Summary
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1.
Sodium greases based on soaps of hydroxystearic acids show considerably less heat-hardening than do the corresponding products made with stearic acid. However, after severe homogenization, the reverse is true.
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2.
Increasing the heat-treating temperature results in more severe heat-hardening of the original and homogenized Na greases.
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3.
The heat-treating time does not affect the heat-hardening process.
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4.
There is a clear relationship between increasing dispersity of the soap fibers and increasing susceptibility of Na greases to heat-hardening.
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5.
Lithium greases made with either stearic or hydroxystearic acid do not heat-harden.
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Literature cited
V. V. Sinitsyn, Abstracts of Papers of the 5th All-Union Conference on Colloid Chemistry [in Russian], Izd. AN SSSR (1962), p. 291; Kolloidn. Zh.,26, No. 2 (1964).
V. V. Sinitsyn, Selection and Application of Greases [in Russian], Izd. Khimiya (1969).
V. V. Sinitsyn, E. L. Ponomareva, and K. I. Penyaeva, Dokl. Akad. Nauk SSSR,181, No. 1 (1968).
K. I. Klimov and B. N. Leont'ev, Khim. i Tekhnol. Topliv i Masel, No. 4 (1958).
Additional information
Translated from Khimiya i Tekhnologiya Topliv i Masel, No. 2, pp. 50–52, February, 1972.
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Sinitsyn, V.V., Ponomareva, E.L. Heat-hardening of sodium and lithium greases based on soaps of stearic and hydroxystearic acid. Chem Technol Fuels Oils 8, 145–147 (1972). https://doi.org/10.1007/BF00718987
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DOI: https://doi.org/10.1007/BF00718987