Ether Carboxylic Acid Stabilizes Water-Soluble Metalworking Fluid
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The use of grease on sliding surfaces in machine tools can lead to demulsification of water-soluble metalworking fluids when mixed with the cutting oil tank, resulting in the deterioration of the fluid.
Innovation Solution
A water-soluble metalworking oil comprising a base oil and a specific ether carboxylic acid, which reduces demulsification even when grease is present, is developed. The ether carboxylic acid is represented by a specific formula and is blended in a predetermined amount to enhance the stability of the metalworking fluid.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If grease is used on sliding surfaces in machine tools, then sliding motion is facilitated, but demulsification of water-soluble metalworking fluid occurs when grease mixes with the cutting oil tank
Solution Approach 1:
The patent introduces a specific ether carboxylic acid as an intermediary substance that mediates between the grease and the water-soluble metalworking fluid. This ether carboxylic acid, with its specific molecular structure containing polyoxyethylene groups, acts as a compatibilizer that prevents the grease from causing demulsification, thereby allowing both sliding motion facilitation and emulsion stability to coexist
Solution Approach 2:
The patent changes the chemical parameters of the metalworking fluid by incorporating a specific ether carboxylic acid with controlled HLB value (5.0 or more) and specific molecular structure. This parameter change transforms the fluid's properties to be more resistant to demulsification caused by grease, resolving the contradiction between ease of operation and composition stability
2Object-affected harmful factors
If water-soluble metalworking fluid is used, then fire safety is improved, but the fluid deteriorates when grease mixes into the cutting oil tank
Solution Approach 1:
The ether carboxylic acid serves as a protective intermediary that shields the water-soluble metalworking fluid from the harmful effects of grease contamination. By incorporating this specific additive, the fluid maintains its water solubility and emulsion stability even in the presence of grease, thereby preserving both fire safety and reliability
Solution Approach 2:
The patent creates a composite metalworking fluid system that combines water-soluble base oil, ether carboxylic acid, and grease-resistant properties. This composite formulation integrates multiple functional components to achieve both fire safety (from water solubility) and stability (from grease resistance), resolving the contradiction between these two desirable properties
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 proposed water-soluble metalworking oil effectively reduces demulsification of the metalworking fluid when grease is mixed in the cutting oil tank, thereby maintaining the fluid's quality and extending its usage duration.
Implementation Method 1
the content of the ether carboxylic acid (B) is 0.1 to 10% by mass based on the total amount of the water-soluble metalworking oil... When formed into a metalworking fluid, the water-soluble metalworking oil according to a preferred embodiment of the present invention reduces demulsification of the metalworking fluid even when grease for machine tools is mixed in the cutting oil tank
Data Source
AI summary
A water-soluble metalworking fluid that includes a base oil (A) and an ether carboxylic acid (B) represented by general formula (b-1), where A is a C1-4 alkylene group, when multiple A are present, each A may be the same group or may be a different group, B is a single bond or a C1-4 alkylene group, n is an integer of 1-100, and R is a hydrocarbon group. The ether carboxylic acid (B) content is 0.1-10 mass % based on the total amount of the water-soluble metalworking fluid.