Phosphite Ester Lubricant Additives for Durable Wear and Demulsibility
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Solution Overview
Problem
Existing lubricating oil compositions exhibit a decrease in demulsibility and wear resistance over time, especially when water is present, necessitating a need for additives that provide long-lasting durability and performance.
Innovation Solution
A combination of phosphite ester compounds represented by specific formulas (1) and (2) at a specific mass ratio, along with a sulfur-based extreme pressure agent, is used to enhance wear resistance and demulsibility in lubricating oils.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If phosphite ester compound (A) alone is used, then initial wear resistance is achieved, but durability of wear resistance decreases with time in the presence of water
Solution Approach 1:
The invention uses a composite additive system combining phosphite ester compound (A) with specific structural features (R1, R2, R3 groups) and phosphite ester compound (B) in a defined mass ratio range. This composite approach creates synergistic effects where compound (A) provides initial wear protection while compound (B) ensures long-term durability, resolving the contradiction between initial performance and time-maintained reliability in aqueous environments
Solution Approach 2:
The invention optimizes the mass ratio parameter of phosphite ester compound (A) to phosphite ester compound (B) within the range of 99:1 to 80:20. By adjusting this compositional parameter, the system achieves balanced performance where the ratio determines the trade-off between initial wear resistance (higher compound A) and durability (higher compound B), allowing optimization for specific application requirements
2Reliability
If phosphite ester compound (A) alone is used, then initial demulsibility is achieved, but durability of demulsibility decreases with time in the presence of water
Solution Approach 1:
The composite system of phosphite ester compound (A) and phosphite ester compound (B) works synergistically to maintain demulsibility over time. Compound (A) provides initial water separation capability while compound (B) ensures sustained demulsibility durability, preventing the deterioration that occurs when compound (A) is used alone in the presence of water
Solution Approach 2:
The mass ratio parameter of compounds (A) and (B) is optimized within 99:1 to 80:20 to achieve durable demulsibility. This parameter control ensures that sufficient compound (B) is present to maintain water separation performance over extended periods, resolving the time-dependent deterioration of demulsibility
3Strength
If chlorine-based extreme pressure agents are used, then extreme pressure properties are improved, but skin irritation and metal rusting occur
Solution Approach 1:
The invention extracts and eliminates harmful chlorine-based extreme pressure agents from the lubricant composition. Instead, it employs phosphite ester compounds (A) and (B) that provide adequate extreme pressure protection through alternative chemical mechanisms, thereby removing the harmful effects of skin irritation and metal rusting while maintaining load-bearing capability
Solution Approach 2:
The phosphite ester compounds provide a safer, biodegradable alternative to persistent harmful additives. These compounds deliver the necessary extreme pressure protection without the long-term environmental and health hazards associated with chlorine-based agents, effectively replacing harmful substances with benign alternatives
4Strength
If sulfur-based compounds are used, then load resistance is improved, but unique odor and potential harm to human body occur
Solution Approach 1:
The invention removes sulfur-based compounds from the additive package, eliminating their characteristic odors and potential harmful effects on human health. Phosphite ester compounds (A) and (B) provide equivalent or superior load resistance through phosphorus-based extreme pressure mechanisms, achieving the same protective function without the harmful byproducts
Solution Approach 2:
The phosphite ester additive system offers a cleaner, odor-free alternative to sulfur-based compounds. These additives provide necessary load protection without the persistent unpleasant odors and potential health hazards, creating a safer working environment while maintaining lubricant 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 additive composition maintains excellent wear resistance and demulsibility even in the presence of water, with improved durability and synergistic load resistance.
Implementation Method 1
the occurrence of a change with time in the adsorption behavior to the metal surface due to the mixing of water
Data Source
AI summary
Disclosed is an additive for lubricating oil, which comprises a phosphite ester compound (A) having a specific structure and a phosphite ester compound (B) having a specific structure, wherein a mass ratio of the phosphite ester compound (A) to the phosphite ester compound (B) (phosphite ester compound (A) : phosphite ester compound (B)) is 99:1 to 80:20. According to the present invention, it is possible to provide an additive for lubricating oil, capable of imparting wear resistance and demulsibility with respect to a base oil for lubricating oil, and to impart durability even in the presence of water.