Organogel Composition for Aircraft Sealant Surface Preparation
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Solution Overview
Problem
Conventional sealant application methods for aircraft surfaces are time-consuming due to the lengthy curing process of polysulfide sealants, which slows down aircraft production and maintenance efficiencies.
Innovation Solution
An organogel composition comprising organic solvents, acrylates, and functional additives that can concurrently clean and treat the surface as an adhesion promoter, reducing the need for separate cleaning steps and accelerating the sealant application process by forming a cross-linked network that facilitates faster curing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional polysulfide sealant application methods are used, then proper sealing and adhesion are achieved, but the curing process takes up to 24 hours or more, significantly slowing production and maintenance efficiency
Solution Approach 1:
The invention segments the conventional single-step sealant application into two distinct components: a Class A adhesion promoter containing acrylate monomers and a Class B thixotropic sealant. The Class A component is applied first to prepare the surface and initiate rapid adhesion, while the Class B component is applied subsequently to complete the sealing function. This segmentation allows the adhesion phase to occur rapidly while the sealing phase follows, overall reducing cure time while maintaining sealing quality.
Solution Approach 2:
The invention changes the chemical parameters of the sealant system by incorporating acrylate monomers (such as polybutadiene dimethacrylate, pentaerythritol tetraacrylate, or polyethylene glycol diacrylate) into the Class A adhesion promoter. These acrylates undergo rapid polymerization upon exposure to moisture or catalysts, fundamentally changing the curing kinetics from slow polysulfide crosslinking to fast acrylate polymerization, thereby reducing cure time from 24+ hours to minutes or hours while maintaining adhesion strength.
2Reliability
If conventional multi-step surface preparation is used (solvent cleaning followed by separate adhesion promoter application), then proper surface preparation is achieved, but the process becomes time-consuming and complex
Solution Approach 1:
The invention merges the solvent cleaning function and adhesion promoter application into a single integrated Class A composition. The organic solvents (such as ketones, esters, or alcohols) in the Class A composition simultaneously dissolve and remove contaminants from the surface while the acrylate monomers prepare the surface for rapid adhesion. This consolidation eliminates the need for separate cleaning and priming steps, reducing preparation time while ensuring proper surface preparation quality.
Solution Approach 2:
The Class A adhesion promoter serves multiple functions simultaneously: it acts as a solvent-based cleaner to remove organic contaminants, a surface preparer to enhance adhesion, and a rapid-curing adhesive to provide immediate bonding. This multi-functionality replaces the conventional sequence of solvent cleaning, surface treatment, and adhesion promotion with a single universal composition that performs all tasks, thereby reducing both time and process complexity.
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 organogel composition significantly reduces the time required for sealing surfaces, enhancing manufacturing efficiency and cost savings by simultaneously cleaning and preparing the surface for sealant application, while also providing a visual indicator for treated areas.
Implementation Method 1
The one or more acrylates can include one or more acrylate monomers... forming a cross-linked network that facilitates faster curing
Implementation Method 2
The visual indicator can absorb energy in the ultraviolet spectrum. The visual indicator can emit energy in the visible spectrum. The one or more functional additives can include the visual indicator, and the visual indicator can be a fluorescent or phosphorescent.
Implementation Method 3
The one or more organic solvents can include an aliphatic hydrocarbon, an aromatic compound, a ketone, an amine, an ester, an alcohol, an aldehyde, an ether, or combinations thereof
Data Source
AI summary
An organogel composition and methods for preparing the organogel composition and preparing a surface with the organogel composition are disclosed. The organogel composition can include one or more organic solvents, one or more acrylates, and one or more functional additives. The method for preparing the organogel composition can include contacting the one or more organic solvents, the one or more acrylates, and the one or more functional additives with one another to prepare the organogel composition, and homogenizing the organogel composition to modify a shear viscosity of the organogel composition.