Multifunctional Dispersant Composition for Automatic Transmission Fluids
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Solution Overview
Problem
Formulating a lubricant additive for automatic transmission fluids (ATFs) that balances multiple performance requirements such as lubrication, dispersancy, friction control, antiwear, and anti-corrosion while simplifying the composition and reducing variability and cost.
Innovation Solution
A composition comprising a dispersant, a 1,3-dicarboxylic acid or 1,4-dicarboxylic acid of an aromatic compound, 2,5-dimercapto-1,3,4-thiadiazole, a borating agent, and a phosphorus acid compound, heated to form a reaction product soluble in lubricating viscosity oil, which is used in mechanical devices like transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple separate additive components are included in ATF to provide lubrication, dispersancy, friction control, antiwear, and anti-corrosion performance, then the required functionality is achieved, but the formulation complexity and variability increase
Solution Approach 1:
The patent combines multiple additive functions (dispersancy, corrosion inhibition, friction control, antiwear) into a single multifunctional additive composition. This is achieved by merging a dispersant with specific additives (2,5-dimercapto-1,3,4-thiadiazole or derivatives, borating agents, and phosphorus acid compounds) to create one integrated product that replaces multiple separate components, thereby reducing formulation complexity while maintaining all required functionalities
Solution Approach 2:
The invention creates a universal additive composition that performs multiple functions simultaneously: dispersing contaminants, inhibiting corrosion, controlling friction, and providing antiwear protection. The composition is designed to be broadly applicable across different automatic transmission fluid formulations, serving as a multi-functional solution that adapts to various performance requirements without increasing formulation complexity
2Adaptability or versatility
If multiple separate additive components are used in ATF formulation, then comprehensive performance characteristics are achieved, but the treat rate and cost increase
Solution Approach 1:
By combining multiple functional additives into a single composition, the patent reduces the total quantity of substances that need to be added to the base oil. Instead of separately dosing dispersants, corrosion inhibitors, friction modifiers, and antiwear agents, all these functions are delivered through one integrated additive package, thereby reducing the overall treat rate and associated costs
3Reliability
If traditional additive packages with multiple components are used, then all lubricating requirements are met, but the variability of the formulation increases
Solution Approach 1:
The patent reduces formulation variability by merging multiple variable components into a single integrated composition. By pre-combining the dispersant with corrosion inhibitors, friction modifiers, and antiwear agents in fixed ratios, the invention eliminates the variability that arises from separately dosing multiple components, thereby improving formulation stability and consistency across different batches
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 solution provides a multifunctional additive that enhances lubrication and corrosion inhibition, simplifies the formulation process, and potentially reduces treatment rates and costs, effectively addressing the complex requirements of modern automatic transmissions.
Implementation Method 1
heating together: (a) a dispersant; and (b) a 1,3-dicarboxylic acid or 1,4-dicarboxylic acid of an aromatic compound, or a reactive equivalent thereof; and at least one of: (c) 2,5-dimercapto-1,3,4-thiadiazole
Implementation Method 2
said heating being sufficient to provide a reaction product of (a), (b), and (c), (d), or (e)
Data Source
AI summary
The present invention provides a composition comprising the product prepared by hearing together: (a) a dispersant; and (b) a 1,3-dicarboxylic acid or 1,4-dicarboxylic acid of an aromatic compound, or a reactive equivalent thereof; and at least one of: (c) 2,5-dimercapto-1,3,4-thiadiazole or a hydrocarbyl-substituted 2,5-dimercapto-1,3,4-thiadiazole, or an oligomer thereof; (d) a borating agent; and (e) a phosphorus acid compound, or a reactive equivalent thereof, said heating being sufficient to provide a reaction product of (a), (b), and (c), (d), or (e), which is soluble in an oil of lubricating viscosity. The invention further provides a use for the composition.