Partly Neutralized Fatty Amine Salts as Friction Modifiers
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Solution Overview
Problem
Current lubricating oil compositions for internal combustion engines do not effectively reduce friction, which limits fuel economy and engine efficiency.
Innovation Solution
A partly neutralized fatty amine salt, specifically formulated with a hydrocarbyl group of 12-24 carbon atoms and an acid with 16-24 carbon atoms, is used as a friction modifier in lubricating oils, with a molar ratio of nitrogen atoms to fatty acid ranging from 5:1 to 1.25:1, to create a lubricating oil composition that reduces friction in engines and gearboxes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional friction modifiers like molybdenum dithiocarbamate are used, then a lubricating film is formed on metal surfaces, but the coefficient of friction is not sufficiently reduced and fuel economy is not improved
Solution Approach 1:
The patent changes the chemical composition parameters by using fatty amine salts with specific chain lengths (C12-C24) and controlled neutralization degrees (50-80%), which fundamentally alters the friction modification mechanism to achieve superior fuel economy results
Solution Approach 2:
The invention creates a composite lubricating film on metal surfaces by combining fatty amine salts with base oil, forming a hybrid boundary layer that integrates the benefits of both organic salt compounds and hydrocarbon lubricants for optimal friction reduction
2Reliability
If the viscosity of motor oil is increased to maintain a lubricating film, then wear protection is improved, but the oil flows less freely and engine efficiency decreases
Solution Approach 1:
The fatty amine salt forms a thin, flexible boundary film on metal surfaces that provides effective wear protection without requiring high bulk oil viscosity, allowing the oil to flow freely while maintaining protective film integrity under operating conditions
3Reliability
If fully neutralized fatty amine salts are used as friction modifiers, then lubricating film formation is enhanced, but the friction reduction effect is insufficient compared to partly neutralized salts
Solution Approach 1:
The patent applies partial neutralization (50-80% rather than 100%) of fatty amine salts, creating an optimal balance where sufficient neutralization provides film stability while retaining enough basic character to deliver superior friction reduction, demonstrating that excessive neutralization actually diminishes performance
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 lubricating oil composition significantly reduces friction, enhancing fuel economy and engine efficiency by maintaining a stable lubricating film between moving parts, as demonstrated in friction testing with improved performance compared to traditional components.
Implementation Method 1
The lubricating oil composition significantly reduces friction, enhancing fuel economy and engine efficiency by maintaining a stable lubricating film between moving parts
Data Source
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AI summary
The present invention relates to the use of a partly neutralised fatty amine salt where the fatty amine is having the formula where R is a hydrocarbyl group having 12-24 carbon atoms; X is H, a C1 -C4 alkyl group, benzyl or -CH2CH2CH2NH2, m is 2 or 3 and n is 0-3, provided that when n is 0, then X IS-CH2CH2CH2NH2, and m is 3; and where the acid neutralising the fatty amine has the formula R'COOH (II), where R'CO is an acyl group having 16-24 carbon atoms; and where the molar ratio between the moles of nitrogen atoms in the fatty amine and the moles of fatty acid is 5:1 to 1.25:1; as a friction modifier for a lubricating oil, especially for an internal combustion engine. The invention also relates to a lubricating oil composition comprising the partly acid neutralised product (I), and to a method for lubrication of interfacing mutually movable surfaces by bringing the surfaces into contact with the said lubricating oil.