MANNICH DISPERSANT VI-IMPROVER BLENDED WITH PHENOLIC COMPOUND FOR IMPROVED STORAGE STABILITY

摘要

Abstract of the InventionImproved dispersant and VI-improving Mannich composi-tion having reduced susceptibility to viscosity increaseduring storage, which composition comprises a physicalblend prepared by admixing a phenolic compound with a Man-nich condensation product obtained from the Mannichreaction of an oxidized polymer, an amine and a formalde-hyde-yielding reagent.