DICARBOXYLIC DIESTER, PROCESS FOR PRODUCING THE SAME, AND REFRIGERATING MACHINE LUBRICATING OIL COMPRISING THE ESTER
申请人:NEW JAPAN CHEMICAL CO.,LTD.
公开号:EP1227078A1
公开(公告)日:2002-07-31
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 x 1011 Ω·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.
由式表示的二酯
其中 A 代表环己烷环、环己烯环或苯环,X 为 H 或甲基,RX 和 RY 相同或不同,且各自为 C3-C18 支链烷基、C1-C18 直链烷基、C2-C18 直链烯基或 C3-C10 环烷基,条件是当 A 为苯环时,RX 和 RY 彼此不同,且 -COORX 和 -COORY 连接到苯环的两个相邻碳原子上,并具有以下性质:
1) 总酸数不超过 0.05 mgKOH/g、
2) 硫酸盐灰分含量不超过 10 ppm、
3) 硫含量不超过 20 ppm、
4) 磷含量不超过 20 ppm、
5) 过氧化值等于或小于 1.0 meq/kg、
6) 羰基值等于或小于 10;
7) 体积电阻率等于或大于 1 x 1011 Ω-cm、
8) 羟值为 3 mgKOH/g 或更低,以及
9) 含水量等于或小于 100 ppm、
制备该二元酯的工艺和包含该二元酯的冷冻机润滑油。