Alkoxylated Polyol Ester Base Oils for Low Pour Points
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Solution Overview
Problem
Current lubricants, including petroleum-derived Group I/II, synthetic esters, and vegetable oils, face challenges in viscosity, thermal stability, oxidative stability, cost, and environmental impact, failing to meet the increasing demands for high-performance lubricants with varied viscosities and environmental friendliness.
Innovation Solution
The development of biodegradable lubricating base oils through esterification of alkoxylated polyols, specifically propoxylated glycerol, with long-chain saturated fatty acids, achieving high bio-based content, low pour points, and viscosity indices, using techniques like epoxidation and metathesis to enhance thermal and oxidative stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If synthetic esters are used to achieve broad viscosity range, then viscosity requirements are met, but cost increases and pour point is severely affected
Solution Approach 1:
The patent combines alkoxylated polyols (providing viscosity control and low pour point) with long-chain saturated fatty acids (providing thermal stability and lubricity) to create a composite ester lubricant that achieves both broad viscosity range and acceptable pour point characteristics
Solution Approach 2:
The patent adjusts the degree of alkoxylation (average alkoxy units per polyol) and fatty acid chain length to precisely control viscosity while maintaining pour point below freezing temperatures, thereby meeting both viscosity requirements and low-temperature performance
2Object-affected harmful factors
If vegetable oils are used for environmental friendliness, then biodegradability improves, but thermal and oxidative stability deteriorates
Solution Approach 1:
The patent creates a composite structure by esterifying alkoxylated polyols with long-chain saturated fatty acids, combining the biodegradability of natural-derived components with the thermal stability of saturated fatty acid structures
Solution Approach 2:
The patent uses readily available alkoxylated polyols and common saturated fatty acids (such as stearic acid, palmitic acid) to create a cost-effective, biodegradable lubricant that maintains stability without requiring exotic or expensive materials
3Length of stationary object
If high viscosity lubricants are produced from petroleum derivatives, then viscosity requirements are met, but cost increases and viscosity index deteriorates
Solution Approach 1:
The patent utilizes the variable degree of alkoxylation in alkoxylated polyols to precisely tune viscosity across a broad range while maintaining high viscosity indices, as the alkoxy chains provide flexible molecular structures that resist viscosity breakdown
4Length of stationary object
If ultra-low viscosity lubricants are produced from petroleum derivatives, then low viscosity requirements are met, but viscosity index deteriorates
Solution Approach 1:
The patent achieves ultra-low viscosities by using alkoxylated polyols with lower average alkoxylation values while maintaining high viscosity indices through the molecular structure characteristics of the esterified products
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 solution provides lubricating base oils with improved thermal stability, oxidative stability, and viscosity characteristics, offering a cost-effective, environmentally friendly alternative to existing lubricants, suitable for various applications including greases and dielectric fluids.
Implementation Method 1
esterifying alkoxylated polyols (average alkoxylation > 3) with long-chain (≥ C14) saturated acids
Implementation Method 2
improved thermal stability
Implementation Method 3
improved oxidative stability
Data Source
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AI summary
The present disclosure relates to methods and compositions for making bio-based, biodegradable, and non-bioaccumulating lubricating base oils generated by esterifying alkoxylated polyols (average alkoxylation ≥ 3) with long-chain (≥ C14) saturated and unsaturated fatty acids (FA) or fatty acids modified using industry recognized techniques.