Molybdated Succinimide Additive for Friction and Wear Control
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Solution Overview
Problem
Existing molybdenum-containing lubricating oil compositions face challenges with friction reduction, wear inhibition, and oxidation control, particularly due to sulfur compatibility issues with emission control devices and corrosion concerns.
Innovation Solution
A molybdated succinimide complex is prepared by reacting an alkyl or alkenyl succinimide of a polyamine with an ethylenically unsaturated carboxylic acid or anhydride, followed by treatment with an acidic molybdenum compound, to create a lubricating oil additive that enhances friction reduction and wear and oxidation inhibition without sulfur-related problems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If molybdenum dithiocarbamates are used to reduce friction, then friction reduction is improved, but sulfur content increases causing incompatibility with emission control devices and corrosion problems
Solution Approach 1:
The patent extracts the harmful sulfur element from the friction reduction mechanism by replacing sulfur-containing molybdenum dithiocarbamates with sulfur-free molybdenum compounds combined with phosphorus-containing additives. This separation eliminates the harmful effects of sulfur while preserving the beneficial friction reduction properties.
Solution Approach 2:
The patent changes the chemical composition parameters by substituting sulfur-based compounds with alternative compositions containing molybdenum and phosphorus. This parameter change maintains the friction modification capability while eliminating sulfur-related incompatibility issues with emission control devices.
2Reliability
If sulfur is added to lubricating oil for friction reduction, then lubricating properties are improved, but corrosion problems and emission control device incompatibility worsen
Solution Approach 1:
The patent converts the harmful role of sulfur by replacing it with phosphorus-containing compounds that provide similar lubricating benefits without the harmful effects. The phosphorus-based additives deliver the same functional advantages for friction and wear protection while being compatible with emission control systems.
3Reliability
If conventional molybdenum compounds are used for wear and oxidation control, then lubricating performance is improved, but sulfur content increases causing environmental and equipment compatibility issues
Solution Approach 1:
The patent removes sulfur from the chemical composition by replacing conventional sulfur-based molybdenum compounds with alternative formulations using phosphorus-containing additives in combination with molybdenum, thereby eliminating harmful sulfur content while preserving wear and oxidation protection.
Solution Approach 2:
The patent creates a composite additive system combining molybdenum compounds with phosphorus-containing additives to achieve synergistic effects for wear and oxidation protection. This composite approach replaces single sulfur-based compounds with a multi-component system that provides enhanced performance without sulfur-related issues.
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 molybdated succinimide complex effectively reduces friction, inhibits wear, and prevents oxidation corrosion in internal combustion engines, while minimizing sulfur and phosphorus content, thus addressing compatibility issues with emission control devices.
Implementation Method 1
reacting an alkyl or alkenyl succinimide of a polyamine with an ethylenically unsaturated carboxylic acid or anhydride
Implementation Method 2
reacting the succinimide product of step (a) with an acidic molybdenum compound
Implementation Method 3
molybdenum compounds are known to improve the lubricating properties of engine oils
Implementation Method 4
sulfurized molybdenum polyisobutenyl succinimide complexes which are used to mediate wear, reduce friction, and/or control oxidation
Data Source
AI summary
L A molybdated suednimide complex prepared by a process which comprises (a) reacting an alky! or alkeny! succLmrnide of a polyamine of formula (I) wherein R is an about C12 to C30 alkyl or alkenyl group, a and b are independently 2 or 3, and x is 0 to 10, with an eihylenicaUy unsaturated carboxylic acid or anhydride thereof; and (b) reacting the suceinim?de product of step (a) with an acidic molybdenum compound. 2, The molybdated succu?mide complex of Claim 1, wherein R is about C12 to about C24 alky! or alkenyl group, a and b are each 2, and x is 2 to 5. 3, The molybdaied succinimide complex according to Claims I or 2, wherein the etbyienicaily unsaturated carboxylic acid or anhydride is an athy?enicaily unsaturated monocarboxyiic acid or anhydride thereof, 4, The molybdated sueeimmide complex according to Claims 1 or 2, wherein the ethylemcally unsaturated carboxylic acid or anhydride is an ethylepicaliy unsaturated dicarboxylic acid or anhydride thereof