| Autor: |
Ishchuk, Yu. L., Sinitsyn, V. V., Nakonechnaya, M. B., Goshko, N. S., Prokopchuk, V. A., Ishchuk, L. P. |
| Zdroj: |
Chemistry and Technology of Fuels and Oils; August 1966, Vol. 2 Issue: 8 p563-568, 6p |
| Abstrakt: |
1.Variations in the chain length (molecular weight) of individual fatty acids or of average molecular weight of narrow SFA fractions cause a substantial change in the rheological and other characteristics of solidols prepared from these acids. The maximum thickening effect for calcium soaps of individual acids corresponds to stearic (C18) acid or narrow SFA fraction of similar molecular weight.Higher or lower molecular weights of the acid lead to decreases in viscosity and yield value of the greases and to poorer colloidal stability (oil separation).2.The use of a mixture of individual acids or of mixtures of SFA fractions increases the thickening power of the calcium soaps. Broadening the distillation range of the acids has a favorable effect on the rheological and other properties of the solidols, but only up to a definite limit, after which the solidol quality again begins to worsen.3.In order to obtain the greatest thickening effect in the production of synthetic solidols, it is advisable to use a C13-C22 fraction of thermally treated distilled SFA's of not less than 95% purity. Control over the SFA composition must be accomplished by gas chromatography. |
| Databáze: |
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| Externí odkaz: |
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