Polyalkylene Glycol Fluid with Unsaturated Ester for Fire Resistance
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Solution Overview
Problem
Conventional polyalkylene glycol (PAG) lubricants suffer from oxidative instability and poor oil solubility, requiring antioxidants and expensive flushing processes, and lack sufficient fire resistance for high-temperature industrial applications.
Innovation Solution
A fluid composition combining an alcohol-initiated polyalkylene glycol with a glycerol-initiated unsaturated ester and an antioxidant, enhancing fire resistance and oil solubility, particularly using a homopolymer of 1,2-butylene oxide or copolymer of 1,2-butylene oxide and propylene oxide, and excluding tertiary and quaternary carbon atoms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional PAGs are used as base oils, then favorable performance benefits as hydraulic fluids and turbine oils are achieved, but oxidative instability occurs unless antioxidant is present and fire resistance is insufficient
Solution Approach 1:
The patent combines conventional PAGs with unsaturated esters to create a composite lubricant composition. This composite approach allows the PAG component to provide favorable performance benefits while the unsaturated ester component contributes improved fire resistance and oxidative stability, resolving the contradiction between performance and harmful factors.
Solution Approach 2:
The patent modifies the chemical composition parameters by incorporating specific ratios of unsaturated esters (containing carbon-carbon double bonds) into the PAG base oil. This parameter change transforms the fluid's fire resistance properties and oxidative stability without sacrificing the underlying performance benefits of the PAG system.
2Reliability
If conventional PAGs are used, then lubricant performance is maintained, but poor oil solubility requires expensive flushing processes
Solution Approach 1:
By creating a composite lubricant with unsaturated esters blended with PAGs, the invention achieves compatibility with existing hydraulic systems that use hydrocarbon fluids. The unsaturated ester component provides oil solubility characteristics that eliminate the need for expensive flushing processes during system conversion, while the PAG component maintains lubricant performance.
3Object-affected harmful factors
If water-based lubricants are used, then fire resistance is improved, but suitability for high temperature applications decreases due to water evaporation
Solution Approach 1:
The patent changes the chemical composition by using unsaturated esters with specific molecular structures (containing carbon-carbon double bonds but no tertiary or quaternary carbon atoms) combined with PAGs. This parameter modification achieves fire resistance comparable to water-based lubricants while maintaining thermal stability for high-temperature applications, eliminating the contradiction between fire safety and temperature suitability.
4Ease of manufacture
If hydrocarbon oils are used, then oil solubility is maintained, but fire resistance is insufficient for high temperature applications
Solution Approach 1:
The invention creates a composite lubricant where unsaturated esters (providing hydrocarbon-like solubility characteristics) are combined with PAGs (providing improved fire resistance). This composite approach maintains oil solubility compatible with existing hydrocarbon-based systems while achieving the fire resistance necessary for high-temperature industrial applications.
Data Source
AI summary
A fluid contains a base oil consisting of an alcohol-initiated polyalkylene glycol where polyalkylene glycol component is selected from a homopolymer of 1,2-butylene oxide and copolymer of 1,2-butylene oxide and propylene oxide; a glycerol-initiated unsaturated ester that is free of tertiary carbon atoms and quaternary carbon atoms; and an antioxidant.