Waterborne Paint Circuit Purge Cleaner With Low VOC and COD
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Solution Overview
Problem
Existing purge cleaners for paint circuits have low cleaning efficiency and high VOC and COD in wastewater, necessitating improved cleaning methods with reduced organic solvent and amine content.
Innovation Solution
A waterborne purge cleaner solution comprising at least one glycolether and a water-soluble amine with 7-15 carbon atoms, eliminating the need for surfactants and reducing the use of high-VOC solvents like benzylalcohol and butylglycol, while enhancing cleaning efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional purge cleaners with high organic solvent content are used, then cleaning efficiency is improved, but VOC content and COD in wastewater increase
Solution Approach 1:
The invention changes the chemical composition parameters of the purge cleaner by using water-soluble amines with 7-15 carbon atoms instead of conventional high-VOC solvents. This parameter change maintains cleaning efficiency while reducing VOC content and COD in wastewater, directly resolving the technical contradiction between cleaning performance and environmental harm.
Solution Approach 2:
The invention creates a composite waterborne purge cleaner solution combining water-soluble amines with specific carbon atom counts (7-15) and glycolethers. This composite formulation achieves both effective paint circuit cleaning and reduced environmental impact, simultaneously addressing cleaning efficiency and VOC/COD reduction requirements.
2Reliability
If water-soluble amines with 7-15 carbon atoms are used, then cleaning efficiency is improved and COD is reduced, but formulation complexity increases
Solution Approach 1:
The invention applies local quality by selecting amines with a specific carbon atom range (7-15) that provides optimal balance between water solubility and cleaning effectiveness. This targeted selection within a defined parameter range simplifies the formulation process while maintaining high cleaning efficiency and COD reduction performance.
3Object-generated harmful factors
If high-VOC solvents like benzylalcohol and butylglycol are eliminated, then VOC content is reduced, but cleaning efficiency may decrease
Solution Approach 1:
The invention changes the solvent parameter from high-VOC compounds (benzylalcohol, butylglycol) to water-soluble amines with 7-15 carbon atoms. This parameter substitution eliminates harmful VOC emissions while maintaining or improving cleaning efficiency through the unique properties of the selected amine compounds.
Solution Approach 2:
The invention converts the potential disadvantage of water-based formulations (traditionally lower cleaning power) into a benefit by using specifically selected water-soluble amines with 7-15 carbon atoms. These amines provide effective cleaning while eliminating VOC emissions, turning the water-based constraint into an environmental advantage.
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 solution achieves improved cleaning efficiency and significantly lowers VOC content and COD in wastewater, eliminating the need for a post-rinse step and reducing concentrate usage.
Implementation Method 1
a waterborne purge cleaner solution comprising at least one glycolether and which additionally comprises at least one water-soluble amine having at least 7 carbon atoms
Implementation Method 2
Waterborne purge cleaners containing water-soluble organic solvents such as glycolethers and certain amines like diethanolamine or triethanolamine are known from the prior art
Data Source
AI summary
Described herein is a waterborne purge cleaner solution with improved cleaning efficiency and reduced VOC (Volatile Organic Compound) content as well as a concentrate for producing the purge cleaner solution.