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公开(公告)号:US3598738A
公开(公告)日:1971-08-10
申请号:US3598738D
申请日:1968-12-19
申请人: DU PONT
IPC分类号: C10M143/04 , C08F210/18 , C10M143/02 , C10M143/06 , C10M143/10 , C10M143/14 , C10M143/16 , C10N20/02 , C10N30/00 , C10N40/25
CPC分类号: C10M143/02 , C08F210/18 , C10M2203/06 , C10M2203/10 , C10M2203/102 , C10M2205/00 , C10M2205/04 , C10M2205/06 , C10M2205/10 , C10M2205/22 , C10M2209/084 , C10M2211/024 , C10M2211/06 , C10M2215/04 , C10M2215/086 , C10M2215/26 , C10M2215/28 , C10M2217/022 , C10M2217/023 , C10M2217/046 , C10M2217/06 , C10M2219/044 , C10M2219/046 , C10M2223/045 , C10N2210/02 , C10N2220/02 , C10N2240/08 , C10N2270/02 , C08F210/06 , C08F2500/17
摘要: THIS INVENTION RELATES TO MINERAL OIL COMPOSITIONS COMPRISING A NEUTRAL, NON-VOLATILE, MINERAL OIL AND AN EFFECTIVE AMOUNT OF A VISCOSITY INDEX IMPROVER SELECTED FROM A LIMITED CLASS OF OIL-SOLUBLE, SUBSTANTIALLY LINEAR, ETHYLENE,HYDROCARBON COPOLYMERS CONTAINING 25 TO 55 WEIGHT PERCENT POLYMERIZED ETHYLENE UNITS AND HAVNG A PENDENT INDEX OF 18 TO 33, AN AVERAGE PENDENT SIZE NOT EXCEEDING 10 CARBON ATOMS, AN AVERAGE CHAIN LENGTHL OF 2,700 8,800 CARBON ATOMS AND AN INHERENT VISCOSITY OF 0.7 TO 1.8 AS MEASURED ON A 0.1 WEIGHT PERCENT SOLUTION IN TETRACHLOROETHYLENE AT 30*C.