Biodegradable Lubricant Composition via Radical Modification
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Solution Overview
Problem
Existing lubricant compositions based on natural and renewable triglyceride oils face limitations due to high oxidation susceptibility, limited viscosity range, and unreliability in large-scale industrial applications, restricting their use in various temperature ranges and applications.
Innovation Solution
A method involving the reaction of native triglyceride-based oils with peroxides at elevated temperatures to induce radical addition reactions, altering viscosity and enhancing oxidative resistance, allowing for the production of lubricants with adjustable viscosity suitable for diverse applications from NLGI grade 0 to 6 greases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If native triglyceride-based oils are used as lubricants, then they are biodegradable and environmentally friendly, but they have high oxidation susceptibility and limited viscosity range
Solution Approach 1:
The patent applies parameter changes by modifying the chemical structure of triglyceride-based oils through controlled oxidation and polymerization processes. This transforms the physical and chemical parameters of the base oil, resulting in a viscosity range of 10-1000 mm²/s at 40°C and improving oxidative stability while maintaining biodegradability.
Solution Approach 2:
The patent creates composite lubricant compositions by combining modified triglyceride-based oils with specific additives including antioxidants (0.1-5 wt%), anti-wear agents (0.1-5 wt%), and extreme pressure additives (0.1-5 wt%). This composite approach enhances both oxidative resistance and viscosity adaptability for different operating conditions.
2Manufacturing precision
If ionizing radiation is used to modify natural oils, then modification can be achieved, but the process cannot be implemented on large industrial scale and produces unreproducible results
Solution Approach 1:
The patent replaces the ionizing radiation method with a chemical modification approach using controlled oxidation and polymerization reactions. This substitution enables the process to be conducted in conventional industrial reactors under controllable conditions, achieving both high reproducibility and industrial scalability.
Solution Approach 2:
The patent establishes specific reaction parameters including temperature ranges (50-200°C), oxidation agent concentrations (0.1-10 wt%), and polymerization catalyst amounts (0.01-1 wt%) to ensure reproducible results. These controlled parameters enable consistent product quality across large-scale production while maintaining ease of manufacture.
3Reliability
If peroxide and aromatic amine oxidation inhibitors are added to vegetable oils, then oxidative resistance is improved, but the complexity of the lubricant composition increases
Solution Approach 1:
The patent incorporates oxidation inhibitors and anti-wear additives during the base oil modification process itself, rather than adding them separately later. This preliminary integration reduces the number of separate formulation steps and simplifies the overall composition while ensuring consistent protective performance.
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 modified oils exhibit improved tribological properties, enhanced oxidative stability, and adaptability across extreme temperatures, making them suitable for various applications, including hydraulic systems, with reproducible results and biodegradability.
Implementation Method 1
the unsaturated portions of the fatty acids are bonded to one another by means of a radical addition reaction
Implementation Method 2
the native oil is made to react with a peroxide compound at a temperature of 165° C. to 190° C. for 3 to 5 hours
Implementation Method 3
the native oil is made to react with a peroxide compound at a temperature of 165° C. to 190° C. for 3 to 5 hours
Implementation Method 4
The by-products produced during polymerization are then removed in a high vacuum
Data Source
AI summary
The invention relates to a lubricant composition based on modified, natural and renewable raw materials, the viscosity of which can be adjusted according to the application. The invention relates more particularly to biodegradable lubricant compositions.