Refrigerator Oil Composition with Phosphite Ester Wear Resistance
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Solution Overview
Problem
Refrigerator oil compositions face challenges in providing sufficient wear resistance under harsh conditions, as conventional additives like tricresyl phosphate and triphenyl phosphine oxide do not meet the required performance standards.
Innovation Solution
A refrigerator oil composition containing a base oil and specific phosphite esters, along with phosphoric acid compounds and organic phosphine oxide compounds, is developed to enhance wear resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional additives like tricresyl phosphate are blended with base oil, then the lubricating performance is improved, but the wear resistance under harsh conditions is insufficient
Solution Approach 1:
The patent changes the chemical parameters of the phosphorus compound from conventional phosphoric acid esters (TCP) to specific phosphite esters with defined molecular structures (general formula (1)), achieving superior wear resistance and machine life under harsh conditions
Solution Approach 2:
The patent creates a composite lubricating oil composition by combining base oil with specific phosphite ester compounds (B) and phosphoric acid compounds (C) in defined ratios, achieving synergistic effects that improve both wear resistance and machine life
2Reliability
If phosphoric acid esters such as TCP are used as additives, then the lubricating performance is enhanced, but the wear resistance under harsh conditions deteriorates
Solution Approach 1:
The patent modifies the chemical structure parameter by using phosphite esters (general formula (1)) instead of conventional phosphoric acid esters, achieving both improved wear resistance and extended machine life under harsh operating conditions
3Reliability
If the content of phosphorus compound is increased to improve wear resistance, then the wear resistance is enhanced, but the compatibility with base oil and refrigerant may deteriorate
Solution Approach 1:
The patent optimizes the concentration parameters by defining specific content ranges for phosphite ester (B: 0.05-1%) and phosphoric acid compound (C: 0.1-1.5%), achieving the optimal balance between wear resistance improvement and compositional stability/compatibility
Solution Approach 2:
The patent creates a multi-component composite system combining base oil with specific phosphite and phosphoric acid compounds in defined proportions, achieving synergistic effects that simultaneously improve wear resistance and maintain compatibility
Data Source
AI summary
An object is to provide a refrigerator oil composition excellent in wear resistance and a refrigerator mixture composition. Then, the object is solved by preparing the refrigerator oil composition containing a base oil (A), and a phosphite ester (B) containing at least one selected from the group consisting of a first phosphite ester (B1) and a second phosphite ester (B2) each having a specific structure. Further, it is solved by preparing the refrigerator mixture composition containing the refrigerator oil composition, and a refrigerant.