| 摘要 |
A dispersant composition comprising the reaction product of an ashless dispersant selected from the group consisting of (i) Mannich dispersants, (ii) succinimide dispersants, (iii) succinate ester-amide dispersants, and (iv) polymeric viscosity index improvers having amine dispersant character, with an inorganic mineral acid selected from the group consisting of sulfuric, nitric and hydrochloric acids. |
