著者

若菜 章 広川 隆一 藤田 稔 熊沢 元春

出版者

Japan Oil Chemists' Society

雑誌

油化学 (ISSN:18842003)

巻号頁・発行日

vol.20, no.4, pp.242-245, 1971

---

Pour point reversions of various lubricating oils containing one of three different type pour point depressants (naphthalene-chlorinated paraffin condensation product, phenol-chlorinated paraffin condensation product and polyalkylmethacrylate) were measured by sudden cooling-heating cycle method and Federal test method.<BR>In the former test any pour point reversion was not recognized, but in the latter test a 2.57.5°C range of the pour point reversions was observed in all cases.<BR>Polyalkylmethacrylate gave the most effective pour point depressions and the most stable pour point reversions among the additives.

著者

若菜 章 広川 隆一 藤田 稔 熊沢 元春

出版者

Japan Oil Chemists' Society

雑誌

油化学 (ISSN:18842003)

巻号頁・発行日

vol.20, no.6, pp.352-356, 1971

---

Authors prepared three lubricating base oils having different pour points (0°, -5°, -10°C) by dewaxing of solvent refined waxy raffinate, and then three kinds of representative commercial pour point depressants (naphthalene-chlorinated paraffin condensation product, phenol-chlorinated paraffin condensation product and polyalkylmethacrylate) were added to them in the concentration range of 0.10.5wt%. Thereby the authors measured the ordinary pour points, Federal test method (cycle C) pour points and observed the pour point reversions.<BR>Variance analysis of experimental values showed that Federal test method pour points depended upon the dewaxing temperatures and kind of additives but not affected by the quantity of additives, while the pour point reversions were influenced by these three factors.<BR>Generally, pour point reversions were higher for the samples prepared from base oils of higher pour point.