DICARBOXYLIC ACID DIESTER, A PROCESS FOR PREPARATION THEREOF AND REFRIGERATOR LUBRICATING OIL CONTAINING THE DIESTER

摘要

A DIESTER REPRESENTED BY THE FORMULAWHEREIN A REPRESENTS A CYCLOHENAXE,CYCLOHEXENE OR BENZENE RING, X IS H OR METHYL, RX AND RY ARE THE SAME OR DIFFERENT AND EACH IS C3-C18 BRANCHED-CHAIN ALKYL,C1-C18 STRAIGHT-CHAIN ALKYL,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 MEG/KG OR LESS,@6) A CARBONYL VALUE OF 10 OR LESS;@7) A VOLUME RESISTIVITY OF 1 X 1011 O.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.