Liquid Detergent Composition for Paint Adhesion Removal
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Solution Overview
Problem
Current solvent-based rinsing media used in paint shops for removing uncured paint adhesions are plagued by high vapor pressure, leading to health and environmental hazards, and VOC-reduced alternatives lack sufficient cleaning power and fast drying times.
Innovation Solution
A composition comprising 30-85% by mass of an organic solvent with VOC properties and 15-40% by mass of dibasic esters, which significantly reduces VOC content while maintaining high cleaning power and short drying times, even with short contact times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If VOC-based solvents (xylene, butyl acetate, n-butanol) are used for removing uncured paint adhesions, then cleaning power and short drying times are achieved, but health hazards, environmental risks, and olfactory nuisance increase due to high vapor pressure
Solution Approach 1:
The patent changes the chemical composition parameters by replacing high-VOC solvents with a specific formulation containing 30-85% by weight of alternative solvents (toluene, ethyl acetate, isopropyl alcohol, butyl glycol, dibasic esters) in controlled proportions. This parameter change reduces VOC content while maintaining cleaning effectiveness through synergistic solvent combinations that preserve paint-removal capability without the severe health and environmental hazards of traditional solvents like xylene
Solution Approach 2:
The patent creates a composite rinsing medium by combining multiple solvent components (toluene, ethyl acetate, isopropyl alcohol, butyl glycol, dibasic esters) in specific weight ratios. This composite formulation achieves balanced performance: toluene provides strong paint-dissolving power, ethyl acetate and isopropyl alcohol contribute to fast evaporation, butyl glycol and dibasic esters extend solvent action on dried paint, resulting in a composite material that maintains cleaning reliability while reducing overall VOC harmfulness
2Object-affected harmful factors
If VOC-reduced or VOC-free rinsing media are used, then health and environmental risks are reduced, but cleaning power and drying times become insufficient
Solution Approach 1:
The patent optimizes solvent concentration parameters by formulating a mixed solvent system where each component is present in specific weight percentages (30-85% total). This parameter optimization ensures that enough volatile components remain to provide fast drying times and strong cleaning power, while the overall VOC content is reduced by replacing the most harmful solvents with less hazardous alternatives in controlled proportions
Solution Approach 2:
The patent develops a composite rinsing medium that combines solvents with complementary properties: toluene (strong dissolving power), ethyl acetate (fast evaporation), isopropyl alcohol (penetration and drying), butyl glycol (extended solvent action), and dibasic esters (paint softening). This composite material achieves a balance where the collective action of components provides sufficient cleaning power and acceptable drying times while reducing reliance on highly harmful VOCs
3Loss of time
If high proportions of volatile solvents are used to achieve short drying times, then contact time requirements are met, but vapor pressure and olfactory nuisance increase
Solution Approach 1:
The patent adjusts the volatility parameters by selecting and proportioning solvents with different evaporation rates. Fast-evaporating components (ethyl acetate, isopropyl alcohol) are included at 20-70% to ensure short drying times, while slower-evaporating components (butyl glycol, dibasic esters) at 10-40% reduce peak vapor pressure and extend effective cleaning time. This parameter balancing achieves short drying times without excessive olfactory nuisance
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 effective removal of paint adhesions with reduced VOC exposure, lower raw material consumption, improved environmental compatibility, and shorter drying times, making it suitable for automated painting processes.
Implementation Method 1
Rinsing media consisting of various volatile organic solvents are often used for this cleaning task
Implementation Method 2
A common disadvantage of the commonly used components is their high vapor pressure. Some of them are released into the ambient air and are therefore referred to as volatile organic compounds (VOC)
Data Source
Figure 1
AI summary
The invention relates to a rinsing medium with which paint adhesions can be removed even after a short contact time, which demonstrates a high level of cleaning power and cleaning spontaneity, improved eco-friendliness, and reduced occupational health risks while simultaneously achieving acceptable drying times, wherein the invention proposes a substance composition, specifically a liquid rinsing or cleaning composition based on organic solvents, particularly for removing uncured paint adhesions, said composition comprising the following components: (1) at least one organic solvent with VOC properties; and (2) at least one dibasic ester; the proportion of component (2) being 15-40 % by mass of the total composition. The invention also relates to uses of the composition.