Alkoxyboroxine Seal Compatibility Agents in Lubricants
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Solution Overview
Problem
Existing boroxine compounds used in lubricating oils are hydrolytically sensitive, which affects their stability and compatibility with engine seals, particularly with fluoropolymer materials.
Innovation Solution
The use of alkoxyboroxine compounds with alkyl groups of 10-16 carbon atoms, which provide improved hydrolytic stability and enhanced seal compatibility by reducing hydrolytic reactions, is introduced. These compounds are incorporated into lubricating oil compositions at concentrations ranging from 0.1 to 5 wt.% and can be synthesized using orthoboric acid and trialkyl borates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional boroxine compounds are used in lubricating oils, then seal compatibility is improved, but hydrolytic stability deteriorates
Solution Approach 1:
The patent changes the chemical parameters of the boroxine compound by introducing alkyl groups with specific carbon chain lengths (10-16 carbons) and using long-chain alcohols in the synthesis process. This parameter modification enhances the hydrophobicity and steric protection of the boroxine compound, thereby improving hydrolytic stability while maintaining seal compatibility functionality
Solution Approach 2:
The invention creates a composite molecular structure by combining the boroxine core with long-chain alkyl groups derived from long-chain alcohols. This composite structure integrates the seal-protection functionality of the boroxine with the hydrolytic resistance of the long hydrocarbon chains, achieving both improved hydrolytic stability and seal compatibility
2Object-affected harmful factors
If boroxine compounds are added to lubricating oils, then protection against amine attack on fluoropolymer seals is improved, but susceptibility to hydrolysis increases
Solution Approach 1:
The long-chain alkyl groups act as intermediary protective layers between the hydrolytically sensitive boroxine core and the aqueous environment. These hydrophobic chains shield the boroxine moiety from water molecules, reducing hydrolytic reactions while allowing the boroxine to maintain its protective function against amine attack on seals
Solution Approach 2:
The patent applies preliminary anti-action by pre-equipping the boroxine compound with long hydrophobic chains before introducing it to the lubricating oil system. This pre-protection mechanism prevents hydrolytic degradation before it can occur, allowing the compound to maintain its seal-protection functionality over extended periods
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 alkoxyboroxine compounds enhance the hydrolytic stability and seal compatibility of lubricating oils, improving the resistance of fluoropolymer elastomers to degradation and maintaining performance in various engine applications.
Implementation Method 1
alkoxyboroxine compounds with alkyl groups of 10-16 carbon atoms, which provide improved hydrolytic stability and enhanced seal compatibility by reducing hydrolytic reactions
Data Source
AI summary
The present invention generally relates to compositions for use in lubricating oils. In certain aspects, the present invention is generally directed to boroxine compounds having alkyl groups where one or more of the alkyl groups contains at least 8 carbon atoms. Such compounds may present improved hydrolytic stability, compared to other boroxine compounds. Such boroxine compounds may be used, for example, to improve seal compatibility in an engine. Other aspects of the invention are generally directed to systems and methods for making such boroxine compounds, engine oils containing such boroxine compounds, methods of using such boroxine compounds, or the like.