Hydraulic Lubricant Composition for High Flash Point and Shear Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing hydraulic fluids face challenges in achieving high flash points and improved shear stability while maintaining low temperature performance, with a growing need for sustainable lubricants that reduce carbon footprint.
Innovation Solution
A composition comprising saturated or unsaturated isoparaffinic hydrocarbons, specifically tetrabutene, and polyalkyl (meth)acrylates is used to enhance the flash point and shear stability of hydraulic fluids, with specific molecular weight ranges and ratios of alkyl (meth)acrylates to improve viscosity index and low temperature performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If naphthenic base oils are used for low temperature applications, then low temperature flow performance is improved, but flash point is reduced
Solution Approach 1:
The patent combines tetrabutene (providing high flash point) with polyalkyl (meth)acrylate polymers (providing low temperature flow performance and viscosity index improvement) to create a composite hydraulic fluid formulation that achieves both high flash point and excellent low temperature properties simultaneously
Solution Approach 2:
The invention uses a composite formulation consisting of tetrabutene base oil combined with specifically designed polyalkyl (meth)acrylate polymers containing C1-4, C8-15, and C16-20 alkyl groups, creating a material that exhibits both high thermal stability (flash point) and low temperature fluidity
2Use of energy by moving object
If mineral oils are replaced by semi-synthetic or synthetic base oils to decrease viscosity, then fuel economy is improved, but carbon footprint increases
Solution Approach 1:
The patent modifies the molecular structure parameters of the base oil by using tetrabutene with specific carbon chain lengths and branching patterns, achieving optimal balance between viscosity (for fuel economy) and sustainability (lower carbon footprint compared to fully synthetic alternatives)
3Stability of the object's composition
If viscosity index improvers are added to hydraulic fluids, then viscosity stability across temperature range is improved, but shear stability deteriorates
Solution Approach 1:
The patent applies local quality by incorporating alkyl groups of different chain lengths (C1-4, C8-15, and C16-20) at specific positions within the polyalkyl (meth)acrylate polymer structure, where shorter chains provide viscosity index improvement while longer chains enhance shear stability and prevent polymer breakdown
Solution Approach 2:
The invention creates a composite polymer structure combining different alkyl chain lengths attached to the (meth)acrylate backbone, achieving both high viscosity index and excellent shear stability through the synergistic effect of the multi-component molecular architecture
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 achieves hydraulic fluids with high viscosity index, improved shear stability, and enhanced flash points, contributing to better sustainability and performance in low temperature conditions.
Implementation Method 1
run alkyl(meth)acrylate homo- and co-polymerizations
Implementation Method 2
compositions comprising a high content of saturated or unsaturated isoparaffinic hydrocarbons comprising 12-24 carbon atoms and a polyalkyl (meth)acrylate
Implementation Method 3
improved shear stability
Data Source
AI summary
The present invention is directed to compositions comprising a high content of saturated or unsaturated isoparaffinic hydrocarbons comprising 12-24 carbon atoms and a polyalkyl (meth)acrylate, a method for preparing such compositions and their use to raise the flash point of hydraulic fluids where a good low temperature flow is important, e.g. compressor oils, shock absorber fluids, power steering fluids and, central hydraulic fluids.