Coating Removal Composition for Colored Concrete
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Solution Overview
Problem
Existing coating removal compositions for concrete floors, particularly intentionally colored or stained concrete, often cause damage and discoloration due to their alkaline nature and strong chelating agents, leading to unsatisfactory results and significant costs for recoloring.
Innovation Solution
A coating removal composition comprising a weak metal binding agent, a solvent system with alcohols or esters, and a corrosion inhibition system, which reduces damage to colored concrete substrates by minimizing the interaction with metal-based colorants, thereby retaining the colorant component during the removal process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional coating removal compositions are used, then coating removal effectiveness is improved, but damage and discoloration of colored concrete substrates occurs
Solution Approach 1:
The patent changes the chemical parameters of the coating removal composition by using milder agents (ammonium hydroxide instead of strong alkalis, and alternative chelating agents) to reduce the harmful effects on colored concrete while maintaining coating removal effectiveness
Solution Approach 2:
The patent introduces a corrosion inhibitor as an intermediary substance that protects the colored concrete substrate from direct attack by the coating removal chemicals, allowing effective removal while preventing damage to the colorant component
2Productivity
If strong chelating agents are used, then coating removal performance is improved, but loss of colorant component increases
Solution Approach 1:
The patent modifies the chelating agent parameters by selecting agents with different binding characteristics that are effective against coating metals but gentler on the colorant metals in the concrete substrate
Solution Approach 2:
The corrosion inhibitor acts as a protective intermediary that prevents strong chelating agents from binding to and removing the colorant component while still allowing effective coating removal
3Productivity
If repeated removal and stripping is performed, then coating removal completeness is improved, but damage to color component increases
Solution Approach 1:
The corrosion inhibitor serves as a protective intermediary that prevents damage to the color component during each stripping cycle, enabling repeated removal operations without cumulative damage to the colored concrete substrate
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 coatings from concrete floors while retaining at least 70% of the colorant component, reducing damage and discoloration, and is safer for use on colored concrete surfaces compared to traditional strippers.
Implementation Method 1
the presence of relatively strong chelating agents, such as EDTA, etc., attacking the metal based colorant component
Implementation Method 2
a solvent system comprising at least one alcohol or ester
Implementation Method 3
a corrosion inhibition system
Data Source
AI summary
The present invention is directed to a coating removal composition comprising at least one weak metal binding agent, a solvent system comprising at least one alcohol or ester, and a corrosion inhibition system. A method of removing a coating from an intentionally colored concrete floor is also disclosed. Utilization of the method results in at least 70% retention of colorant component after stripping a coating from an intentionally colored concrete surface, such as a floor.