Lubricating Grease Composition with Composite Base Oils
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Solution Overview
Problem
Conventional fluorine-based lubricating greases face issues such as high cost, poor compatibility with materials, failure to form oil films under high-load conditions, and inadequate rust prevention and corrosion resistance, which are not effectively addressed by existing compositions combining non-fluorine and fluorine-based base oils.
Innovation Solution
A lubricating grease composition is developed using a base oil mixture of non-fluorine and fluorine-based oils, incorporating a complex metal soap thickener and fluororesin powder, which are incompatible on their own, to enhance abrasion resistance and reduce costs, produced through a kneading process involving a three-roll mill.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fluorine-based base oil is used to achieve low-temperature characteristics and oxidation stability, then reliability is improved, but cost increases and compatibility with materials deteriorates
Solution Approach 1:
The patent uses a composite base oil system combining fluorine-based base oil (5-50 wt%) and hydrocarbon-based base oil (50-95 wt%). This composite approach allows the grease to inherit oxidation stability from the fluorine component while the hydrocarbon component improves compatibility with mating materials and reduces cost.
2Reliability
If fluorine-based base oil is used to achieve low-temperature characteristics, then reliability is improved, but cost increases
Solution Approach 1:
The patent employs a composite base oil system where fluorine-based base oil (5-50 wt%) provides low-temperature characteristics while hydrocarbon-based base oil (50-95 wt%) reduces cost. This composite approach optimizes the balance between performance and cost-effectiveness.
3Reliability
If conventional fluorine-based grease is used to achieve chemical resistance, then reliability is improved, but abrasion resistance deteriorates due to failure to form oil films under high-load conditions
Solution Approach 1:
The patent uses a composite base oil system combining fluorine-based base oil for chemical resistance with hydrocarbon-based base oil that forms effective oil films under high-load conditions, thereby improving abrasion resistance while maintaining chemical resistance.
4Object-affected harmful factors
If non-fluorine-based base oil is added to reduce cost and improve compatibility, then cost decreases and compatibility improves, but the incompatibility between non-fluorine and fluorine-based oils creates mixing difficulties
Solution Approach 1:
The patent optimizes the composition parameters by controlling the fluorine-based base oil content at 5-50 wt% and hydrocarbon-based base oil at 50-95 wt%. This parameter optimization ensures adequate compatibility and cost-effectiveness while maintaining sufficient homogeneity for practical use.
Data Source
AI summary
Disclosed is a lubricating grease composition comprising a complex metal soap thickener of aliphatic dicarboxylic acid and monoamide monocarboxylic acid, and a fluororesin powder contained in a base oil mixture of a non-fluorine-based base oil and a fluorine-based base oil, which are incompatible with each other. The lubricating grease composition can be produced by kneading, preferably kneading by a three-roll mill, a non-fluorine-based grease and a fluorine-based grease, the non-fluorine-based grease being prepared by stirring a non-fluorine-based base oil, aliphatic dicarboxylic acid, and monoamide monocarboxylic acid under heating, and adding metal hydroxide thereto to form a complex metal soap in the non-fluorine-based base oil; and the fluorine-based grease being prepared from a fluorine-based base oil and a fluororesin powder.