Lubricating Oil Additive Composition for Engine Dispersancy

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Solution Overview

Problem

Existing lubricant formulations face challenges in effectively dispersing particulate matter in internal combustion engines, leading to issues like filter plugging and oil thickening due to inadequate dispersancy.

Innovation Solution

A lubricating oil additive composition is developed through a process involving copolymers formed by free radical copolymerization of monoethylenically unsaturated acids or anhydrides with 1-olefins or polyolefins, along with ether and aromatic compounds, enhancing dispersancy and stability in engine oils.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional dispersant/detergent compounds are used in lubricating oil formulations, then the basic lubrication function is maintained, but adequate dispersancy of particulate matter is insufficient leading to filter plugging and sludge accumulation

Engineering Contradiction:

Improvedispersancy of particulate matterVSAvoidfilter plugging and sludge accumulation

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent employs a composite additive system combining oxidized ethylene copolymer with formaldehyde compound and amino-aromatic polyamine compound. This composite approach creates synergistic effects where the oxidized copolymer provides dispersancy, formaldehyde compound enhances stability, and amino-aromatic polyamine provides detergency, collectively resolving the dispersancy insufficiency of conventional single additives

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent modifies the chemical structure and properties of the base polymer through oxidation of ethylene copolymer, creating reactive carbonyl groups that subsequently react with formaldehyde and amine compounds. This parameter change in chemical reactivity and molecular structure enables the additive to achieve superior dispersancy and stability performance

Inventive Principle:

Principle #35Parameter changes

2Reliability

If dispersant additives are added to improve particulate matter dispersancy, then filter plugging and sludge accumulation are reduced, but oil thickening may occur due to inadequate viscosity control

Engineering Contradiction:

Improveparticulate matter dispersancyVSAvoidoil viscosity stability

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The oxidized ethylene copolymer additive system performs multiple functions simultaneously: dispersing particulate matter, stabilizing viscosity, preventing sludge accumulation, and maintaining oil solubility. The polymeric structure provides both steric hindrance for dispersancy and viscosity modification capabilities, eliminating the need for separate additives and preventing oil thickening

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 additive composition improves dispersancy and viscosity control, reducing the risk of filter plugging and oil thickening, thereby enhancing the performance and longevity of engine oils.

Implementation Method 1

copolymers formed by free radical copolymerization of monoethylenically unsaturated acids or anhydrides with 1-olefins or polyolefins

Methodology Applied

Scientific EffectFree radical copolymerization:

Implementation Method 2

Lubricating oil additive composition

Methodology Applied

Scientific EffectLubrication: Lubrication

Data Source

PatentUS8067347B2Lubricating oil additive composition and method of making the same

Publication Date: 2011.11.29 CHEVRON ORONITE CO LLC

AI summary

An oil-soluble lubricating oil additive composition prepared by the process which comprises reacting a copolymer, with at least one ether compound, with at least one aliphatic compound, and with at least one aromatic compound.