Nitrogen-containing dispersant-viscosity improvers for lubricating oils

摘要

Dispersant viscosity improvers for lubricating oil compositions comprise reaction product of higher molecular weight olefinic reactants with carboxylic reactants of the formula R<3>C(O)(R<4>)nC(O)OR<5> (IV) or the corresponding acetals, hemiacetals, ketals, and hemiketals thereof which is then reacted with at least one of ammonia, a hydrazine or an amine.