| abstract |
An oil soluble composition useful as a multifunctional viscosity improver additive for oleaginous composition :omprising adduct of:n (A) high molecular weight ethylene copolymer substituted carboxylic acid material comprising reaction product of (i) ethylene copolymer having a number average molecular weight of at least 15,000, and (ii) monounsaturated carboxylic acid material; and (B) at least one polyamine contining one primary amino group and at least one, preferably from 1 to 6, secondary amino group. |