Lubricating oil containing viscosity index improver

Compositions – Electrolytes for electrical devices

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Details

252 515R, 524544, 5253276, 525380, C10M14906

Patent

active

048122610

ABSTRACT:
Lubricating oil of improved dispersancy and anti-oxidancy contains an ethylene-propylene copolymer onto which has been graft polymerized allyl glycidyl ether, the graft polymer having been thereafter functionalized with (i) N-vinyl pyrrolidone and (ii) a Mannich base formed from N-(aminoethyl) piperazine, formaldehyde, and nonyl phenol.

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patent: 4640788 (1987-03-01), Kapuscinski et al.
patent: 4668412 (1987-05-01), Hart et al.
patent: 4693838 (1987-09-01), Varma et al.

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