Aromatic Glycidyl Ether Succinimide Dispersants for Soot Control

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Solution Overview

Problem

Existing succinimide dispersants in lubricating oils face challenges in effectively dispersing soot, leading to issues such as sludge flocculation, precipitation, deposit formation, and increased viscosity, which can result in engine wear and filter plugging.

Innovation Solution

A lubricating oil composition comprising a first succinimide dispersant post-treated with an aromatic glycidyl ether and optionally a second succinimide dispersant, along with a Mannich dispersant, to enhance dispersancy and reduce soot-induced viscosity increase.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional succinimide dispersants are used in lubricating oils, then basic dispersancy is provided, but soot dispersing ability is insufficient leading to sludge flocculation and deposit formation

Engineering Contradiction:

ImprovedispersancyVSAvoidsoot agglomeration and deposit formation

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent applies composite materials by combining two different succinimide dispersants with distinct molecular structures and properties. The first dispersant (Formula 1) provides primary soot dispersing capability while the second dispersant (Formula 2) complements it with additional dispersancy mechanisms, creating a synergistic composite dispersant system that effectively handles soot without causing sludge flocculation or deposit formation

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent applies local quality by designing dispersants with specific functional groups at different molecular locations. Formula 1 contains aromatic glycidyl ether groups positioned to interact with soot particles, while Formula 2 provides complementary functional groups that enhance overall dispersancy. Each dispersant component has localized functional characteristics optimized for specific dispersancy tasks

Inventive Principle:

Principle #3Local quality

2Reliability

If dispersants are added to prevent sludge formation, then engine cleanliness is improved, but viscosity increase occurs due to soot thickening

Engineering Contradiction:

Improveengine cleanlinessVSAvoidviscosity stability

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The patent applies parameter changes by carefully controlling the molecular weight, aromatic content, and functional group composition of the two succinimide dispersants. Formula 1 and Formula 2 are designed with specific parameter ranges that optimize soot dispersing ability while minimizing viscosity increase. The balanced composition parameters enable effective soot handling without excessive thickening

Inventive Principle:

Principle #35Parameter changes

3Reliability

If higher concentrations of dispersants are used to improve soot dispersing, then soot handling performance increases, but oil thickening and filter plugging worsen

Engineering Contradiction:

Improvesoot dispersing abilityVSAvoidoil thickening and filter plugging

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent applies homogeneity by designing dispersants that create uniform and stable soot dispersions throughout the lubricating oil. Formula 1 and Formula 2 are formulated to produce homogeneous soot-dispersant complexes that remain evenly distributed without aggregating. This homogeneous dispersion prevents localized thickening and reduces the risk of filter plugging while maintaining effective soot dispersing ability

Inventive Principle:

Principle #33Homogeneity

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The composition demonstrates superior soot dispersing ability, reducing viscosity increase and improving engine cleanliness, as evidenced by lower viscosity and reduced deposit formation, thereby extending engine life and maintaining optimal performance.

Implementation Method 1

a first succinimide dispersant composition comprising a reaction product of a hydrocarbyl succinimide and an aromatic glycidyl ether

Methodology Applied

Scientific EffectChemical reaction: Chemical Bonding

Implementation Method 2

The polar head can attach to the insoluble material such as soot, sludge, and other impurities while the long hydrocarbon tail keeps the dispersant suspended in oil

Methodology Applied

Scientific EffectAdsorption: Adsorption

Data Source

PatentUS12577492B2Succinimide dispersants post-treated with aromatic glycidyl ethers that exhibit good soot handling performance

Publication Date: 2026.03.17 CHEVRON ORONITE CO LLC

AI summary

A lubricating oil composition is described. The composition includes a base oil, a first succinimide dispersant composition comprising a reaction product of a hydrocarbyl succinimide and an aromatic glycidyl ether having a structure:wherein R1 is an aryl or alkaryl group having 4 to 20 carbon atoms, and R2 and R3 are independently a hydrogen atom, an alkyl group, or an aryl group; and a second succinimide dispersant.