Water-Based Semi-Synthetic MWF with Primary Amines for Microbial Control
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Solution Overview
Problem
Existing semi-synthetic metal working fluids (MWFs) degrade over time due to microbial growth, leading to issues such as souring, viscosity changes, shortened shelf life, tool corrosion, and increased corrosion rates, with biocides posing health hazards and regulatory challenges.
Innovation Solution
Incorporation of a novel class of primary alkyl alcohol amines as microbial growth control agents in semi-synthetic MWFs, combined with base oils, organic acids, emulsifiers, and water, to maintain performance and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional biocides are added to control microbial growth in MWFs, then microbial growth is suppressed, but health hazards and regulatory restrictions increase
Solution Approach 1:
The patent changes the chemical parameters of the antimicrobial agent by using primary amine alcohols with specific molecular structures (C1-C12 alkyl groups) instead of traditional biocides. This parameter change eliminates formaldehyde release while maintaining microbial growth control effectiveness, directly resolving the health hazard issue.
Solution Approach 2:
The patent employs primary amine alcohols that decompose harmlessly without releasing toxic formaldehyde, effectively replacing persistent harmful biocides with safer, short-lived alternatives that degrade into non-toxic products, thus eliminating long-term health hazards.
2Productivity
If MWFs are used for extended periods, then productivity is maintained, but microbial growth causes souring and performance degradation
Solution Approach 1:
The patent applies primary amine alcohols as preliminary protective agents that prevent microbial growth before it can cause souring and degradation. This proactive approach maintains fluid composition stability throughout extended operational periods, ensuring consistent productivity without performance loss.
Solution Approach 2:
The primary amine alcohols in the patent provide self-sustaining microbial growth control that maintains fluid stability over time without requiring external intervention or batch treatments, enabling continuous productivity while preserving composition stability.
3Reliability
If secondary amine alcohols are used as microbial growth control agents, then microbial growth is suppressed, but formaldehyde release occurs
Solution Approach 1:
The patent inverts the chemical approach by using primary amine alcohols instead of secondary amine alcohols. This structural inversion eliminates the formaldehyde release pathway while maintaining microbial growth control, directly addressing the harmful factor generation issue.
Data Source
AI summary
The current invention relates to a novel class of alkyl alcohol amines where the amine is a primary amine. Embodiments relate to a method of controlling microbial growth in metal working fluids, comprising adding such an alkyl alcohol amine to the metal working fluid. Other embodiments relate to semi-synthetic metal working fluid compositions which include the microbial growth control agent comprising this particular class of alkyl alcohol amines.