Lubricant Base Oil with Cycloalkane Ester Chains
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Solution Overview
Problem
Lubricant oils require higher heat resistance and lubricity to improve productivity and operation stability in industrial applications, as existing condensed esters do not adequately meet these demands.
Innovation Solution
A lubricant base oil composed of condensed esters made from polyhydric alcohols and cycloalkane monocarboxylic acids, which form chemically stable ester chains due to ring strain, enhancing heat resistance and fluidity, and optionally including branched aliphatic acids to adjust viscosity and improve lubricity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional condensed esters are used as lubricant base oil, then the lubricant has acceptable basic lubrication properties, but the heat resistance and lubricity are insufficient for high-productivity industrial applications
Solution Approach 1:
The patent changes the chemical parameters of the ester by specifying precise molecular structures: polyhydric alcohols with 3-6 hydroxyl groups (formula 1) and carboxylic acids with controlled carbon numbers (C2-C20 for aliphatic, C6-C12 for aromatic). This parameter optimization achieves superior heat resistance and lubricity, resolving the contradiction between basic lubrication properties and high-performance requirements
Solution Approach 2:
The invention creates a composite ester structure by condensing multiple hydroxyl groups with multiple carboxylic acid groups to form esters with 3 or more ester bonds. This composite molecular architecture combines the advantages of polyhydric alcohols and polycarboxylic acids, achieving both high heat resistance and excellent lubricity that conventional single-structure esters cannot provide
2Ease of manufacture
If the ester structure is simplified for ease of manufacture, then production cost decreases, but heat resistance and chemical stability deteriorate
Solution Approach 1:
The patent specifies precise parameter ranges for raw materials (polyhydric alcohols with 3-6 hydroxyl groups, carboxylic acids with specific carbon numbers) that balance manufacturability with performance. These parameter constraints guide material selection and synthesis conditions to achieve both ease of production and superior heat resistance
Solution Approach 2:
The invention applies local quality by differentiating the structural requirements of different components: the polyhydric alcohol portion (formula 1) with specific R1-R4 substituents, and the carboxylic acid portion with controlled carbon numbers. This localized structural optimization allows each component to be manufactured efficiently while contributing to the overall heat resistance of the final ester product
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 lubricant base oil exhibits high heat resistance, maintaining stability and lubricity even at high temperatures, with optimized viscosity and pour point, making it suitable for various industrial applications.
Implementation Method 1
condensed esters made from polyhydric alcohols and cycloalkane monocarboxylic acids, which form chemically stable ester chains due to ring strain
Data Source
AI summary
This lubricant base oil includes a condensation ester of an alcohol (A) and a carboxylic acid (B), wherein the alcohol (A) contains a polyhydric alcohol represented by general formula (1) (in formula (1), R1-R4 independently represent a hydrogen atom, a methyl group, or a hydroxyl group, and at least two of R1-R4 each represents a hydroxyl group), and the carboxylic acid (B) contains a C4-C8 cycloalkane monocarboxylic acid. The lubricant base oil has excellent heat resistance and lubricating property.