N-Methylaniline Point of Viscous Petroleum Oils

Abstract

ANALYTICAL EDITION 487 types, but which when dissolved at a suitable concentration gives a maximum spread between normal and branched paraffins. Tabulated data covering the necessary number of 10°C.-wide fractions can then be taken once, and the viscosity of an unknown sample determined at a later date concurrently with a control determination on a selected normal paraffin, to correct for resin or polymer aging. AcknowledgmentOpportunity is taken to thank M. Lapeyrouse of the Esso Laboratories, Research Division, for helpful criticism in con-nection with this work. The authors are also indebted to M. R. Fenske, of the Pennsylvania State College, for supplying the majority of hydrocarbons studied.

Swelling of Synthetic Rubbers in Mineral Oils

“…>^EVERAL methods have been suggested to measure the tendency of mineral oils to swell synthetic rubber compositions. The aniline point (8) of the oils has proved to be a simple and reliable index. It has already been adopted by two engineering societies (Z, 11) and by several private companies as a specification for mineral oils which may come in contact with synthetic rubber compositions.…”