Post-Treated Polymeric Dispersant for Engine Oil
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing lubricant formulations face challenges in effectively dispersing particulate matter in internal combustion engines, leading to issues like filter plugging and oil thickening due to inadequate dispersancy.
Innovation Solution
A post-treated polymeric dispersant is developed by reacting a lubricating oil additive composition with a post-treating agent such as a cyclic carbonate, linear carbonate, aromatic polycarboxylic acid, or aromatic polycarboxylic anhydride, which improves the dispersancy of particulate matter in engine oils.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional dispersants are used in lubricating oil formulations, then the basic dispersancy function is provided, but inadequate particulate matter dispersancy results in filter plugging and oil thickening
Solution Approach 1:
The patent applies parameter changes by modifying the chemical structure of dispersants through post-treatment with cyclic carbonates, linear carbonates, or aromatic polycarboxylic acids/anhydrides. This transforms conventional dispersants into enhanced dispersants with improved particulate matter dispersancy, resolving the contradiction between basic dispersancy function and inadequate performance that causes filter plugging and oil thickening.
Solution Approach 2:
The patent employs composite materials by creating synergistic combinations of enhanced dispersants with conventional dispersants and detergent additives in lubricating oil formulations. This composite approach achieves superior particulate matter dispersancy while preventing filter plugging and oil thickening, overcoming the limitations of single-component dispersants.
2Reliability
If existing dispersant formulations are used, then basic lubrication is maintained, but filter plugging occurs due to insufficient dispersancy
Solution Approach 1:
The patent modifies dispersant molecular parameters through post-treatment reactions that introduce polar groups and enhance solubility characteristics. This parameter optimization improves the dispersant's ability to keep particulate matter in suspension, thereby preventing filter plugging while maintaining basic lubrication functions.
Solution Approach 2:
The enhanced dispersants act as intermediaries between particulate matter and the lubricating oil system. By improving dispersancy through chemical modification, these dispersants effectively mediate the interaction between contaminants and the oil, preventing contaminant deposition on filters and maintaining filter performance.
3Stability of the object's composition
If standard dispersants are employed, then basic oil functionality is preserved, but oil thickening occurs due to poor dispersancy
Solution Approach 1:
The patent applies parameter changes by chemically modifying dispersants to enhance their dispersancy performance. This modification prevents the aggregation of particulate matter that would otherwise cause oil thickening, thereby maintaining oil viscosity stability while preserving basic oil functionality.
Solution Approach 2:
The patent converts the potential harm of particulate matter aggregation (which causes oil thickening) into a benefit by using enhanced dispersants to maintain particulate matter in stable suspension. This approach transforms what would be a harmful thickening effect into a controlled state that preserves oil流动性 and functionality.
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 post-treated polymeric dispersants demonstrate enhanced dispersancy, reducing the likelihood of filter plugging and oil thickening, thereby improving the performance and longevity of engine oils.
Implementation Method 1
The copolymer is further reacted with an amine
Implementation Method 2
the lubricating oil additive composition is post-treated with a post-treating agent selected from a cyclic carbonate
Data Source
AI summary
A post-treated polymeric dispersant which comprises reacting (I) a post-treating agent selected from a cyclic carbonate, a linear mono-carbonate, a linear poly-carbonate, an aromatic polycarboxylic acid or an aromatic polycarboxylic anhydride or an aromatic polycarboxylic acid ester and (II) an oil-soluble lubricating oil additive composition prepared by the process which comprises reacting a copolymer, with at least one ether compound and with at least one aliphatic compound capable of reacting with at least one monocarboxylic acid or ester thereof, or dicarboxylic acid, anhydride or ester thereof.