潤滑油組成物

Lubricating oil composition

Abstract

PROBLEM TO BE SOLVED: To obtain a lubricating oil composition for refrigerator-operating fluids excellent in heat stability and electric non-conductance, without generating carboxylic acids caused by hydrolysis, low hygroscopic and inexpensive by containing a specific phosphorous compound in a base oil. SOLUTION: This lubricating oil composition comprises (A) 100 pts.wt. base oil comprising a cyclic ketal or a cyclic acetal as a main ingredient and (B) 0.01-5 pts.wt. of one or more phosphorus compounds selected from a group consisting of compounds expressed by formula I-III [X1 to X3 , X7 , X8 , X11 and X12 are each a 2-4C alkylene; (p), (q), (r), (s), (t), (u) and (v) are each 0-30; X4 to X6 , X9 , X10 , X14 and X15 are each a 1-18C straight chain alkyl, a 3-18C branched chain alkyl, a 2-18C straight chain alkenyl, a 3-18C branched chain alkyl, etc.]. To obtain the main ingredient in the component A, it is preferable to react (i) one or more 4-25C saturated aliphatic polyhydric alcohols, which have even valencies from 4 to 8 valancies with (ii) a carbonyl compound of formula IV (R1 is H or a 1-12C alkyl; R2 is a 1-12C alkyl) or its reactive derivative such as a ketal or an acetal.
(57)【要約】 【解決手段】(A)環状ケタールあるいは環状アセター ルを主成分とする基油、及び(B)一種以上のリン化合 物を含有することを特徴とする潤滑油組成物、並びに、 かかる潤滑油組成物と(C)ハイドロフルオロカーボン を含有する冷凍機作動流体用組成物。 【効果】本発明により、熱安定性、電気絶縁性に優れ、 加水分解によるカルボン酸の発生が無く、吸湿性が低 く、かつ安価な潤滑油組成物が提供され、かかる潤滑油 組成物とハイドロフルオロカーボンを配合した本発明の 冷凍機作動流体用組成物は、金属接触面における磨耗量 の低減が可能であり、相溶性に優れ、熱安定性、電気絶 縁性、吸湿性に優れ、加水分解によるカルボン酸の発生 が無く、かつ安価なものである。

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    WO-2016170707-A1October 27, 2016Jxエネルギー株式会社Composition d'huile de graissage