Aromatic Polyamine Dispersants for Engine Soot Control
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Solution Overview
Problem
There is a need for dispersants that can be derived from readily available and less expensive starting materials, while maintaining or exceeding the performance of existing dispersants used in lubricants to reduce engine deposits, particularly soot performance.
Innovation Solution
The development of dispersants derived from compounds such as substituted succinic anhydrides and diamines, where the compounds are formed by contacting a substituted succinic anhydride with a diamine or polyamine, utilizing hydrocarbyl groups with specific molecular weight ranges and aryl substitutions, to create compositions effective as lubricant additives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dispersants are derived from phenylene moieties bonded via nitrogen atoms, then soot performance is improved, but manufacturing cost and material availability worsen
Solution Approach 1:
The patent changes the chemical structure parameters by substituting phenylene moieties with alternative aromatic groups (such as naphthyl, anthracenyl, phenanthrenyl) and modifying the nitrogen bonding configuration. This allows maintaining soot dispersancy while using more readily available starting materials like naphthalene and anthracene, thereby reducing manufacturing cost without sacrificing performance
Solution Approach 2:
The invention employs cheaper, more readily available aromatic hydrocarbons (naphthalene, anthracene, phenanthrene) as starting materials instead of expensive phenylene-based compounds. These alternative materials provide comparable soot performance while being more economically viable for large-scale production
2Ease of manufacture
If dispersants are derived from readily available and less expensive starting materials, then manufacturing cost is reduced, but soot performance may deteriorate
Solution Approach 1:
The patent creates composite molecular structures by combining alternative aromatic hydrocarbons (naphthalene, anthracene, phenanthrene) with specific diamine or polyamine components. This composite approach allows the dispersant to achieve both cost-effectiveness and superior soot performance by leveraging the advantageous properties of each component class
Solution Approach 2:
The invention modifies molecular parameters such as aromatic ring substitution patterns, nitrogen content, and hydrocarbon chain lengths to optimize the balance between cost and performance. By adjusting these parameters, the dispersant maintains effective soot interaction while using economical starting materials
3Reliability
If dispersants are formulated with specific hydrocarbyl groups and molecular weight ranges, then soot dispersion performance is improved, but formulation complexity increases
Solution Approach 1:
The patent establishes specific parameter ranges for hydrocarbyl groups (C1-C20) and molecular weights (100-10,000 g/mol) that optimize soot dispersion while simplifying the formulation process. By defining these clear parameter boundaries, the invention makes it easier to select appropriate starting materials and control the synthesis process without excessive complexity
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 resulting dispersants demonstrate improved soot performance and can be formulated at various ratios, effectively addressing the need for cost-effective alternatives with comparable or superior performance to existing dispersants in engine oils.
Implementation Method 1
contacting the substituted succinic anhydride of formula (A) and the diamine of formula (B) to form the composition
Data Source
AI summary
Compositions, including dispersants, derived from substituted succinic anhydrides and aromatic polyamines. Methods for making compositions, the methods including contacting a substituted succinic anhydride and an aromatic polyamine. Lubricants that include a composition derived from a substituted succinic anhydride and an aromatic polyamine. Methods for improving soot performance.