Refrigerating Machine Oil Antiwear Additive
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Solution Overview
Problem
Existing refrigerating machine oils do not provide adequate antiwear properties, which is crucial for the longevity and efficiency of refrigeration systems.
Innovation Solution
A refrigerating machine oil composition that includes a lubricating base oil, a specific dialkyl hydrogen phosphite with two alkyl groups having 1 to 12 carbon atoms, and an epoxy compound, where the dialkyl hydrogen phosphite content is 0.01% by mass or more.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional phosphorus-based additives (phosphoric acid triester and/or phosphorus acid triester) are used in refrigerating machine oil, then the oil can provide basic lubrication, but the antiwear property is insufficient
Solution Approach 1:
The invention changes the chemical parameters of the phosphorus-based additive by using dialkyl hydrogen phosphite with specific alkyl group configurations (1-12 carbon atoms) instead of conventional phosphoric acid triester and phosphorus acid triester. This parameter change in molecular structure and composition enables the additive to provide superior antiwear protection while maintaining compatibility with the refrigeration system.
Solution Approach 2:
The invention creates a composite lubricating oil system by combining the base oil with the specific dialkyl hydrogen phosphite additive and optionally with an epoxy compound. This composite formulation synergistically improves the antiwear properties beyond what conventional single-additive formulations could achieve, addressing the insufficient antiwear protection issue.
2Reliability
If dialkyl hydrogen phosphite with specific alkyl groups (1 to 12 carbon atoms) and epoxy compound are combined in the refrigerating machine oil, then excellent antiwear property is achieved, but the formulation complexity increases
Solution Approach 1:
The invention establishes specific parameter ranges for the alkyl groups (1 to 12 carbon atoms) in the dialkyl hydrogen phosphite molecule. By defining these precise parameters, the invention optimizes the antiwear performance while providing clear guidance for formulation, actually simplifying the development process despite the enhanced performance requirements.
Solution Approach 2:
The invention specifies a minimum content of 0.01% by mass for the dialkyl hydrogen phosphite, allowing formulators to achieve excellent antiwear properties with small but effective amounts of the specialized additive. This partial action approach reduces the need for complex multi-component formulations while still delivering superior performance.
Data Source
AI summary
The present invention provides a refrigerating machine oil containing a lubricating base oil, a dialkyl hydrogen phosphite having two alkyl groups having 1 to 12 carbon atoms in the molecule, and an epoxy compound.