Amide Friction Modifiers Stabilized by Hydrogen-Bonding Additives
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Solution Overview
Problem
Friction modifiers with limited solubility and compatibility in functional fluids, such as engine oils, precipitate out of solution over time, causing instability and haziness, which restricts their use and performance in lubricants and other applications.
Innovation Solution
A composition comprising a medium, a friction modifier component with amide groups, and a stabilizing component that improves solubility and compatibility by forming particles with an average diameter of less than 10 microns, using a compound with hydrogen-donating and hydrogen-accepting groups, ensuring the friction modifier remains dissolved and the composition remains clear and stable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If friction modifiers with limited solubility are used at higher levels to improve performance, then the performance and equipment protection are improved, but the composition becomes unstable and hazy due to precipitation
Solution Approach 1:
The patent introduces a solubility-enhancing additive as an intermediary substance that mediates between the friction modifier and the base oil. This additive has high solubility in the base oil and forms soluble complexes with the friction modifier, allowing the friction modifier to remain dissolved at higher concentrations without causing precipitation or haziness, thus resolving the contradiction between performance improvement and composition stability
Solution Approach 2:
The patent changes the chemical parameters of the composition by introducing a solubility-enhancing additive that modifies the solubility characteristics of the friction modifier. This parameter change allows the system to maintain homogeneity and stability at higher friction modifier concentrations, enabling performance improvement without sacrificing composition stability
2Productivity
If friction modifiers are used at levels above solubility limits to achieve greater performance, then fuel economy and viscosity stability are improved, but the additive package becomes incompatible and separates
Solution Approach 1:
The solubility-enhancing additive serves as a mediator that improves the compatibility between the friction modifier and the base oil. By forming soluble complexes, it allows higher levels of friction modifier to be used for improved fuel economy and viscosity stability without causing incompatibility or separation of the additive package
Solution Approach 2:
The patent creates a composite additive system consisting of the friction modifier, solubility-enhancing additive, and base oil. This composite approach allows the friction modifier to be used at higher effective levels for improved productivity while the solubility-enhancing additive ensures overall compatibility and prevents separation
3Duration of action of stationary object
If maximum treat rates of friction modifiers are used to extend equipment life, then equipment life is extended, but the composition becomes hazy and may require filtration
Solution Approach 1:
The solubility-enhancing additive acts as an intermediary that prevents the friction modifier from precipitating out of solution at maximum treat rates. This maintains the composition's clarity and homogeneity, allowing maximum equipment life extension without generating haziness or requiring filtration
Solution Approach 2:
The patent converts the potential harm of friction modifier precipitation into a benefit by using the solubility-enhancing additive to maintain solubility. This allows the friction modifier to be used at maximum effective levels for extended equipment life without the harmful effect of haziness or filtration requirements
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
Enables the use of higher amounts of friction modifiers while maintaining the stability and clarity of functional fluid compositions, improving performance and extending equipment life, and achieving better fuel economy and viscosity stability.
Implementation Method 1
a stabilizing component that is soluble in (a) and that interacts with (b) such that (b)'s solubility in (a) is improved, where the stabilizing component includes a compound having at least one hydrogen-donating group, a least one hydrogen-accepting group
Data Source
AI summary
The present invention relates to functional fluid compositions containing friction modifiers, and specifically stable compositions containing friction modifiers with limited solubility in and/or limited compatibility with the functional fluids with which they are used. In particular the present invention deals with functional fluids used in internal combustion engines, such as engine oils, and friction modifiers that contain one or more amide functional groups, where the friction modifier is present in the functional fluid composition at levels that would otherwise cause the composition to be unstable and/or hazy.