Refrigerator Oil Antiwear Additive Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Refrigerating machine oils face challenges in achieving both high antiwear property and stability due to limitations in the selection of antiwear agents, which can cause capillary blocking and other issues.
Innovation Solution
A refrigerating machine oil formulation comprising a base oil, a compound represented by a specific formula, and an epoxy compound, where the compound and epoxy compound satisfy certain conditions to enhance both antiwear property and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If phosphate esters such as tricresyl phosphate are used as antiwear agents, then antiwear property is improved, but stability deteriorates due to capillary blocking
Solution Approach 1:
The patent changes the chemical parameters of the antiwear agent by using a specific compound with formula (1) containing sulfur atoms and limiting its content to 0.01-5% by mass, while combining it with an epoxy compound. This parameter change allows achieving high antiwear property while maintaining stability, resolving the contradiction between antiwear performance and compositional stability.
Solution Approach 2:
The patent creates a composite lubricating composition by combining the compound of formula (1) with an epoxy compound in specific proportions. This composite approach allows the sulfur-containing compound to provide antiwear protection while the epoxy compound contributes to stability, preventing capillary blocking and achieving both desired properties simultaneously.
2Strength
If antiwear agents with higher activity are used, then antiwear property is improved, but stability deteriorates
Solution Approach 1:
The patent carefully controls the concentration parameter of the active antiwear agent (compound of formula (1)) within 0.01-5% by mass, which is sufficient to provide high antiwear protection while minimizing negative effects on stability. This optimized parameter selection resolves the contradiction between activity and stability.
Solution Approach 2:
The epoxy compound acts as an intermediary substance that mediates between the high-activity antiwear agent and the base oil system. It helps stabilize the composition and prevent capillary blocking while allowing the antiwear agent to function effectively, thus resolving the contradiction between high antiwear activity and compositional stability.
Data Source
AI summary
The present invention provides a refrigerating machine oil comprising: a base oil; a compound represented by the following formula (1):wherein R1 and R2 each independently represent a monovalent hydrocarbon group, R3 represents a divalent hydrocarbon group and R4 represents a hydrogen atom or a monovalent hydrocarbon group; and an epoxy compound.