1821. ---------------. [KOCH, H., AND GILFERT, W.] [Synthesis of Lubricating Oils From Olefins of Kogasin. II.] Brennstoff-Chem., vol. 21, 1940, pp. 1-7; Chem. Abs., vol. 34, 1940, p. 8240.

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Literature Abstracts

By lowering the temperature of polymerization of a C₃ Kogasin fraction (in presence of anhydrous AlCl₃) from 20° to 0° a more viscous lubricating oil was obtained; its viscosity-temperature behavior was not appreciably affected. At –80° no polymerization occurred. All the lubricating oils produced by polymerization of Kogasin fractions had 1 double bond per mol. Saturation of this bond by hydrogenation caused some increase in the viscosity of the oil, but had little effect on the viscosity-temperature coefficient. Examination of the oils by Waterman’s method indicated the presence of 1 naphthene ring per mol, even for oils of considerably different viscosity-pole heights. The relation between viscosity and the mean molecular weight of the oils is discussed; in this respect some differences are observed between the synthetic oils and petroleum lubricating oils.