Grease Base Oil Heat Resistance Low Temperature Storageability
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Solution Overview
Problem
Lubricant base oils, such as grease base oils, lack sufficient low temperature storageability, which is essential for maintaining fluidity in cold regions, as existing formulations do not adequately address this requirement.
Innovation Solution
A grease base oil composed of condensation esters derived from polyhydric alcohols and carboxylic acids, specifically including fatty acids, branched fatty acids, cycloalkane monocarboxylic acids, and aromatic carboxylic acids, which provide enhanced heat resistance and prevent solidification at low temperatures by maintaining chemical stability and suppressing crystallization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If lubricant base oils are formulated with conventional ester compounds to achieve heat resistance, then thermal stability is improved, but low temperature storageability deteriorates
Solution Approach 1:
The invention changes the chemical parameters of the ester compounds by introducing specific structural features (cycloalkane rings with 4-8 carbon atoms and aromatic rings) into the ester molecules. This modifies the physical properties of the lubricant base oil to simultaneously achieve high-temperature stability and low-temperature fluidity, resolving the contradiction between heat resistance and low temperature storageability
Solution Approach 2:
The invention creates a composite molecular structure by combining multiple types of ester compounds (those containing cycloalkane rings and aromatic rings) within a single lubricant base oil formulation. This composite approach allows the different ester types to work synergistically, with cycloalkane esters providing heat resistance and aromatic esters suppressing crystallization at low temperatures
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 grease base oil maintains fluidity at both high and low temperatures, ensuring high heat resistance and lubricity, with specific kinematic viscosity ranges and composition ratios optimizing its performance in extreme environments.
Implementation Method 1
the ester chain derived from this cycloalkane monocarboxylic acid is chemically stable due to the effect of the ring strain of the cyclo ring, is less susceptible to thermal deterioration of fragile sites due to the structure-derived rigidity
Implementation Method 2
the ester chain derived from this cycloalkane monocarboxylic acid is chemically stable due to the effect of the ring strain of the cyclo ring
Implementation Method 3
the coexistence of the ester chain derived from the cycloalkane monocarboxylic acid and the ester chain derived from the aromatic carboxylic acid suppresses the crystallization between ester molecules even at extremely low temperatures
Data Source
AI summary
A grease base oil, containing: condensation esters of alcohols (A) and carboxylic acids (B), wherein the alcohols (A) include a polyhydric alcohol represented by General Formula (1), the carboxylic acids (B) include a fatty acid having 5 or more and 9 or less carbon atoms (B-1), a branched fatty acid having 15 or more and 20 or less carbon atoms (B-2), a cycloalkane monocarboxylic acid having 4 or more and 8 or less carbon atoms (B-3), and an aromatic carboxylic acid (B-4), and the carboxylic acids (B) have a percentage of (B-1) above of 30 mol% or more and 50 mol% or less, a percentage of (B-2) above of 30 mol% or more and 50 mol% or less, a percentage of (B-3) above of 10 mol% or more and 30 mol% or less, and a percentage of (B-4) above of 1 mol% or more and 15 mol% or less. The grease base oil contains condensation esters having heat resistance and low temperature storageability.