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发明授权
US07271282B1 Dicarboxylic diester, process for producing the same, and refrigerating machine lubricating oil comprising the ester 有权
二羧酸二酯及其制造方法以及包含酯的制冷机润滑油

Dicarboxylic diester, process for producing the same, and refrigerating machine lubricating oil comprising the ester
摘要：
A diester represented by the formula wherein A represents a cyclohexane ring, cyclohexene ring or benzene ring, X is H or methyl group, RX and RY are the same or different and each is C3-C18 branched-chain alkyl group, C1-C18 straight-chain alkyl group, C2-C18 straight-chain alkenyl or C3-C10 cycloalkyl, provided that when A is a benzene ring, RX and RY are different from each other and —COORX and —COORY are attached to two adjacent carbon atoms of the benzene ring, and having the following properties: 1) a total acid number of 0.05 mgKOH/g or less, 2) a sulfated ash content of 10 ppm or less, 3) a sulfur content of 20 ppm or less, 4) a phosphorus content of 20 ppm or less, 5) a peroxide value of 1.0 meq/kg or less, 6) a carbonyl value of 10 or less; 7) a volume resistivity of 1×1011Ω·cm or more, 8) a hydroxyl value of 3 mgKOH/g or less, and 9) a water content of 100 ppm or less, a process for preparing the same and a refrigerator lubricating oil comprising the diester.
摘要（中）：

由下式表示的二酯其中A表示环己烷环，环己烯环或苯环，X为H或甲基，R X和R Y相同或不同 并且各自为C 3 -C 18支链烷基，C 1 -C 18直链烷基，C 2 -C 18直链烯基或C 3 -C 10环烷基，条件是当A为苯环时，R X' SUP>和R Y'彼此不同，-COOR X和-COOR Y连接到苯环的两个相邻碳原子上 ，具有以下特性：1）总酸值为0.05mgKOH / g以下，2）硫酸灰分含量为10ppm以下，3）硫含量为20ppm以下，4）磷含量 20ppm以下，5）过氧化值为1.0meq / kg以下，6）羰基值为10以下; 7）体积电阻率为1×10 11Ω或更大，8）羟值为3mgKOH / g以下，9）水含量为100ppm以下，制备方法 和含有二酯的冰箱润滑油。

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