Ashless Ester Additive Pour Point Depression in Lubricants
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Solution Overview
Problem
Existing non-aqueous lubricant compositions face challenges with high pour points, which affect engine performance at low temperatures, and current pour point depressants are expensive and may adversely impact other lubricant properties, while ash-forming anti-wear additives contribute to emissions.
Innovation Solution
Incorporating ashless, organic ester anti-wear additives and/or friction modifiers as pour point depressants, which depress the pour point by at least 5°C, providing effective lubrication at low temperatures without the drawbacks of conventional materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional pour point depressants are used, then the pour point is lowered, but the cost significantly increases and other lubricant properties are adversely affected
Solution Approach 1:
The patent applies multi-functionality by using ashless organic ester anti-wear additives and friction modifiers to perform multiple functions simultaneously: they provide anti-wear protection, friction modification, and pour point depression. This eliminates the need for separate conventional pour point depressants, thereby reducing cost while maintaining lubricant performance and avoiding adverse effects on other properties.
2Reliability
If ash-forming anti-wear additives are used, then anti-wear protection is provided, but ash contributes to particulate matter in exhaust emissions
Solution Approach 1:
The patent applies parameter changes by transitioning from ash-forming anti-wear additives to ashless organic ester anti-wear additives. This fundamental parameter change in the additive composition eliminates ash formation and particulate matter emissions while maintaining effective anti-wear protection through the organic ester mechanism.
3Temperature
If conventional pour point depressants are used, then the pour point is lowered, but materials that provide additional beneficial properties are not obtained
Solution Approach 1:
The patent applies multi-functionality by selecting ashless organic ester anti-wear additives and friction modifiers that simultaneously provide pour point depression along with additional beneficial properties such as anti-wear protection and friction reduction. This versatile approach replaces single-function conventional pour point depressants with multi-functional additives.
Data Source
AI summary
The use of an ashless, organic ester, anti-wear additive and/or friction modifier as a pour point depressant additive in a non-aqueous lubricant composition and related compositions and methods.