Methylene Chloride-Free Paint Stripping Composition
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Solution Overview
Problem
Existing paint stripper compositions rely on harmful solvents like methylene chloride, toluene, xylene, and acetone, which pose health and environmental risks, and often require additional processing steps for evaporation retarders like wax, necessitating a safer and faster alternative for coating removal.
Innovation Solution
A composition comprising a combination of ethers, esters, alcohols, and glycosides, specifically dioxolane, acetic acid methyl ester, dimethyl carbonate, benzene methanol, and alkyl polyglucosides, without methylene chloride, xylene, or acetone, that effectively removes coatings without the need for wax or other evaporation retarders, offering a safer and faster stripping process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If methylene chloride, toluene, xylene, or acetone are used as solvents in paint stripper compositions, then effective coating removal is achieved, but health and environmental safety deteriorates
Solution Approach 1:
The patent changes the chemical composition parameters by replacing harmful solvents (methylene chloride, toluene, xylene, acetone) with safer alternative solvents that have different chemical properties but achieve the same coating removal function, thereby improving safety while maintaining effectiveness
Solution Approach 2:
The patent uses biodegradable and environmentally friendly solvent alternatives that break down quickly in the environment, replacing persistent harmful chemicals with shorter-lived, safer substances that do not accumulate in the environment
2Loss of energy
If wax or other evaporation retarders are added to stripping compositions, then solvent evaporation is reduced, but process complexity and preparation steps increase
Solution Approach 1:
The patent extracts and removes the wax component from the stripping composition formulation, eliminating the need for separate evaporation retarder additives while maintaining effective solvent performance through the selected solvent blend's inherent properties
Solution Approach 2:
The patent selects solvent combinations that inherently provide both effective coating dissolution and controlled evaporation rates without requiring additional functional additives, making the solvent system multi-functional and simplifying the overall composition
3Productivity
If prior art non-methylene chloride compositions are formulated with hazardous solvents like xylene and acetone, then coating stripping effectiveness is maintained, but health and environmental safety deteriorates
Solution Approach 1:
The patent changes the solvent composition parameters by selecting alternative chemicals with different safety profiles but comparable or superior stripping performance, achieving both productivity and safety goals simultaneously
Solution Approach 2:
The patent uses composite solvent formulations combining multiple safer solvents in specific ratios to achieve the cumulative effect needed for effective coating removal, replacing single hazardous solvent systems with multi-component safe solvent blends
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 provides an improved environmental, health, and safety profile, while being more effective and faster than prior art products, achieving comparable or superior removal efficiency to methylene chloride-based products, particularly for water-based coatings.
Implementation Method 1
These compositions contain solvents that, when applied to a coated surface loosen or dissolve the coating so that at least most of the coating may be wiped or scraped off the surface
Data Source
AI summary
A stripping composition and method for removing a coating, such as a water-based or oil-based paint or stain, from a surface without requiring the use of methylene chloride. The stripping composition preferably comprises at least one ether, at least one ester, at least one amine, at least one alcohol, and at least one glycoside and does not contain any methylene chloride. Preferred ingredients comprise 1,3 dioxolane, acetic acid methyl ester or a carbonate ester or both, MEA (2-aminoethanol), benzene methanol, an alkyl polyglucoside, and methylcellulose. The stripping composition is applied to a coating for a period of time between 5-10 minutes for most water and oil-based coatings and 20-90 minutes for most epoxy coatings to effectively remove at least 80% and preferably at least 90% of the coating.