Cleaning Composition for Metal Surfaces Resolving VOC and Corrosion Trade-offs
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Solution Overview
Problem
Conventional cleaning compositions are inadequate for removing adhesives, particularly resin-based adhesives, from metallic surfaces, often containing high levels of volatile organic compounds (VOC) and being corrosive to personal protective equipment, while also failing to provide effective corrosion protection and easy removal.
Innovation Solution
A cleaning composition comprising 80-90 wt.% 2-(2-butoxyethoxy)ethanol, 5-12 wt.% 3-(2-ethylhexoxymethoxymethyl)heptane, and 3-8 wt.% 2-[bis(2-hydroxyethyl)amino]ethanol, which forms a wet film that provides temporary corrosion protection and is non-corrosive, with low VOC levels, facilitating effective adhesive removal without unpleasant odors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional cleaning compositions are used to remove adhesives from metallic surfaces, then cleaning effectiveness is improved, but volatile organic compound (VOC) levels increase and corrosion protection is insufficient
Solution Approach 1:
The patent changes the chemical composition parameters by using a specific ratio of glycol ether (80-90 wt.%) to hydrocarbon (5-12 wt.%) to achieve effective adhesive removal while maintaining low VOC levels. This parameter optimization resolves the contradiction between cleaning effectiveness and harmful emissions.
Solution Approach 2:
The cleaning composition uses a composite formulation combining glycol ether and hydrocarbon in specific proportions, creating a synergistic effect that provides both effective cleaning and corrosion protection while minimizing VOC emissions. The composite approach allows multiple functions to be achieved simultaneously.
2Reliability
If strong cleaning agents are used to remove cured adhesives, then cleaning power is improved, but damage to personal protective equipment increases
Solution Approach 1:
The patent optimizes the concentration and type of cleaning agents by using glycol ether combined with specific hydrocarbons in controlled proportions. This parameter adjustment provides sufficient cleaning power for cured adhesives while reducing the corrosive impact on personal protective equipment compared to conventional strong solvents.
3Ease of manufacture
If conventional surfactant-based solutions are used for adhesive removal, then ease of formulation is improved, but effectiveness on cured adhesives deteriorates
Solution Approach 1:
The patent creates a composite cleaning system combining glycol ether and hydrocarbon that works synergistically to remove cured adhesives. This composite approach maintains formulation simplicity while dramatically improving effectiveness on cured adhesives compared to single-component surfactant solutions.
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 composition effectively removes adhesives with reduced VOC emissions, is gentle on personal protective equipment, and offers temporary corrosion protection, outperforming commercial products in terms of cleaning efficiency and removability.
Implementation Method 1
A cleaning composition for metallic surfaces of vehicles comprises: from 80 to 90 wt.% of 2-(2-butoxyethoxy)ethanol; from 5 to 12 wt.% of 3-(2-ethylhexoxymethoxymethyl)heptane
Implementation Method 2
upon application to a surface, the composition creates a wet film which can endure on the surface for several hours if left untreated: this film serves to impart to the surface a temporary protection against corrosion
Data Source
AI summary
The present invention is directed to a cleaning composition suitable for metallic surfaces of vehicles, said composition comprising, based on the weight of the composition: from 75 to 90 wt.% of A) at least one compound defined by Formula (I) R1-O-(M-O)n-R2 (I) wherein: R1 and R2 are independently selected from hydrogen and C1-C6 alkyl groups; each M is independently selected from C1-C6 alkylene groups; and, n is an integer of from 1 to 5; from 5 to 15 wt.% of B) at least one acetal defined by Formula (II) below: wherein: R3 and R4 are independently selected from hydrogen, C1-C6 alkyl, C2-C6-alkenyl, C6-C10 aryl, C3-C6 cycloalkyl, OR5 and OR6; R5 and R6 are independently selected from C1-C12 alkyl, C2-C6-alkenyl, C6-C10 aryl, C3-C8 cycloalkyl and -(AO)x-R7; A is -C2H4-, -C3H7- or -C4H8-; x is an integer of from 1 to 4; and, R7 is C1-C12 alkyl, C2-C6-alkenyl, C6-C10 aryl or C3-C8 cycloalkyl; and, from 1 to 10 wt.% of C) at least hydroxyalkylamino compound defined by Formula (III) below wherein: R8 is selected from hydrogen, C1-C6 alkyl, 2-hydroxyethyl and 2-hydroxypropyl; R9 is C2-C6 alkyl; and, R10 is C2-C6 alkyl.