Patent ID: 9624451
Date: 2017-04-18
CPC Classifications: C10M,C10N

Claim:
1. A multiple function dispersant graft polymer comprising two different functional groups, each directly grafted to a polymer backbone having graftable sites, in which: a first functional group comprises the reaction product of an acylating agent and a first amine, the first amine comprising an aromatic primary amine; and a second functional group comprises the reaction product of the acylating agent and a second amine, the second amine comprising an aliphatic primary amine; wherein the multiple function dispersant graft polymer has at least about 5 moles of each of said functional groups per mole of polymer backbone, and wherein the first functional group provides the multiple function dispersant graft polymer with a soot handling performance attribute and the second functional group provides the multiple function dispersant graft polymer with a sludge and varnish control performance attribute, and wherein the only groups grafted to the polymer backbone are acylating agents or reaction products thereof.