Refrigerator oil composition, and method of using the composition for lubrication
申请人:IDEMITSU KOSAN COMPANY LIMITED
公开号:EP1008643A2
公开(公告)日:2000-06-14
Provided is a refrigerator oil composition comprising a refrigerant that comprises carbon dioxide (CO2) as the essential component, and an ester-based lubricating oil composition; wherein the ratio of refrigerant/lubricating oil composition falls between 99/1 and 10/90 by weight. The refrigerator oil composition has good lubricity and sealability and can be stably used for a long period of time in a compression refrigeration cycle in which is used a refrigerant comprising CO2 as the essential component. Also provided is a method of using the composition for lubricating a compression refrigeration cycle equipped with an oil separator and/or a hot gas line.
The present invention refers to a method for producing a low-emitting plasticised polyvinylchloride composition, having a fusion time of less than 5.50 s and a volatility of less than 10% weight loss, by mixing pentaerythritol tetravalerate with a polyvinylchloride composition, the fusion time being measured according to DIN 54 802 and ISO/DIS 4574 and the volatility being measured according to ISO 176 Method A. In a further aspect the present invention refers to a thermoplastic article suitable for use in environments where the article is exposed to heat, wherein the thermoplastic article is based on a plasticized polyvinylchloride composition produced by the method of the present invention.
本发明涉及一种通过将季戊四醇四戊酸酯与聚氯乙烯组合物混合生产低排放增塑 聚氯乙烯组合物的方法,该组合物的熔融时间小于 5.50 秒,挥发性小于重量损失的 10%,熔融时间根据 DIN 54 802 和 ISO/DIS 4574 测量,挥发性根据 ISO 176 方法 A 测量。本发明的另一个方面是指一种适用于暴露于热环境中的热塑性制品,其中该热塑性制 品是以通过本发明方法生产的增塑聚氯乙烯组合物为基础的。
Retention Indices and Sorption Enthalpies of Pentaerythritol and С2–С8 Acid Esters on Nonpolar Stationary Phases
作者:V. V. Emel’yanov、E. L. Krasnykh、S. V. Portnova
DOI:10.1134/s003602442010009x
日期:2020.10
The retention and sorption enthalpy characteristics of 38 pentaerythritol esters of C-2-C(8)carboxylic acids of different structures were determined by gas-liquid chromatography on a nonpolar phase in the temperature range 433.2-563.2 K. The molecular structure was shown to affect the temperature dependence of the retention indices of the esters. The average change in the sorption enthalpy of pentaerythritol tetraesters per CH(2)group is lower in magnitude than the similar contribution for normal alkanes. The excess mixing enthalpy at 298.2 K was evaluated for four fully substituted pentaerythritol esters.