Metal-Free Copolymer Extreme Pressure Agent for Lubricants
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Solution Overview
Problem
Conventional extreme pressure agents for lubricants often contain metal elements like sulfur, phosphorus, and lead, which can cause corrosion and environmental concerns, and their alternatives without these elements have lower performance, making it difficult to find safe and effective alternatives for severe conditions.
Innovation Solution
A copolymer composed of alkyl acrylate and hydroxyalkyl acrylate monomers, with a specific molar ratio and molecular weight range, is used as an extreme pressure agent, providing performance equivalent to conventional agents without containing metal elements, thus ensuring safety and environmental compatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional extreme pressure agents containing metal elements or sulfur/phosphorus are used, then extreme pressure performance is improved, but corrosion and environmental harm occur
Solution Approach 1:
The invention changes the chemical composition parameters by using a copolymer consisting of alkyl acrylate and hydroxyalkyl acrylate monomers with specific molecular weight (40,000-150,000) and specific ratio (50/50 to 80/20), replacing conventional metal-containing extreme pressure agents to achieve both high performance and environmental safety
Solution Approach 2:
The invention uses a composite copolymer structure combining alkyl acrylate and hydroxyalkyl acrylate monomers in specific ratios to create a material that exhibits extreme pressure performance comparable to metal-containing agents without the harmful effects
2Object-affected harmful factors
If metal element-free extreme pressure agents are used, then safety and environmental compatibility are improved, but extreme pressure performance deteriorates
Solution Approach 1:
The invention optimizes parameters including molecular weight (40,000-150,000), monomer ratio (50/50 to 80/20), and chain structure to achieve high extreme pressure performance without metal elements, overcoming the performance limitation of conventional metal-free agents
Solution Approach 2:
The invention introduces specific functional groups (hydroxy groups) at specific positions in the polymer chain to enhance extreme pressure performance locally while maintaining the overall metal-free composition for safety and environmental compatibility
Data Source
AI summary
The purpose of the present invention is to provide an extreme pressure agent which does not contain any metal element or the like and is highly safe but which exhibits performance equivalent to those of conventional extreme pressure agents each containing a metal element or the like when used in lubrication purposes. This extreme pressure agent comprises a copolymer (A) which comprises an alkyl acrylate (a) represented by general formula (1) and a hydroxyalkyl acrylate (b) represented by general formula (2) as the essential constituent monomers, and is characterized in that the reaction ratio of the component (a) to the component (b) (i.e., (a)/(b)) is 50/50 to 80/20 (by mole) and the copolymer (A) has a weight average molecular weight of 40,000-150,000. (In formula (1), R1 represents an alkyl group having 10-18 carbon atoms.) (In formula (2), R2 represents an alkylene group having 2-4 carbon atoms.) (in the formula, R1 represents an alkyl group having 10 to 18 carbon atoms) (in the formula, R2 represents an alkylene group having 2 to 4 carbon atoms).