Asphalt Emulsion Reinforcing Sheet for Fast Drying Coatings
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Solution Overview
Problem
Asphalt emulsions used in roofing and waterproofing applications dry slowly, limiting project completion times and making them vulnerable to rain damage, as existing methods require expensive two-component sprayers or undesirable pre-mixing with emulsion-breakers.
Innovation Solution
Applying an emulsion-breaking agent to a fibrous or foraminous web or layer material, which is then used as a reinforcing sheet, allowing the asphalt emulsion to break and dry rapidly without needing a two-component sprayer, enabling quick evaporation of the aqueous phase.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If an emulsion-breaking agent is mixed with the asphalt emulsion before application, then the drying time is reduced, but the working time of the emulsion is impacted and it becomes undesirable for commercial operations
Solution Approach 1:
The process is divided into two separate steps: first applying the asphalt emulsion to the substrate, then applying the emulsion-breaking agent separately. This segmentation allows the emulsion to maintain its stability and working properties during application, while still achieving rapid drying afterward when the breaker is applied to break the emulsion and liberate the aqueous phase for evaporation.
Solution Approach 2:
The asphalt emulsion is applied to the substrate first, establishing the coating before the emulsion-breaking agent is introduced. This preliminary action ensures proper coverage and positioning of the emulsion while maintaining its stable emulsified state during application, and then the breaker is applied subsequently to initiate rapid drying.
2Loss of time
If a two-component sprayer is used to co-spray the emulsion-breaking agent with the asphalt emulsion, then the drying time is reduced, but the equipment cost increases and operation becomes difficult
Solution Approach 1:
The application process is segmented into two separate single-component applications rather than one complex two-component spray operation. First, the asphalt emulsion is applied using conventional single-component spray equipment, then the emulsion-breaking agent is applied separately, also using conventional equipment. This eliminates the need for expensive, complex two-component sprayers while achieving the same rapid drying effect.
Solution Approach 2:
The substrate serves dual purposes: first as the target for emulsion application, then as the surface for subsequent breaker application. The process leverages the existing substrate surface to deliver both components sequentially using simple, conventional equipment rather than requiring specialized multi-component application systems.
3Ease of manufacture
If the emulsion-breaking agent is applied separately from the asphalt emulsion, then conventional single-component spray equipment can be used, but the process requires multiple application steps
Solution Approach 1:
The asphalt emulsion is applied first as a preliminary step, establishing the coating on the substrate while maintaining its stable emulsified state. This preliminary application allows proper coverage and positioning, and then the emulsion-breaking agent is applied subsequently to initiate rapid drying, creating an efficient two-step process using simple equipment.
Solution Approach 2:
The process maintains continuous productive action by immediately applying the emulsion-breaking agent after the emulsion application. This continuous sequence—emulsion application followed immediately by breaker application—ensures rapid drying without idle time, maximizing productivity despite the two-step process.
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
This method significantly reduces the drying time of asphalt emulsions, allowing for immediate application of subsequent coatings and enhancing operational efficiency, reducing labor and costs, and enabling the use of aqueous asphalt emulsions in new applications like quick-set insulation adhesives.
Implementation Method 1
This causes the emulsion to be broken, which in turn liberates its aqueous phase for rapid evaporation
Implementation Method 2
liberates its aqueous phase for rapid evaporation
Data Source
AI summary
The invention relates to a process for shortening the time needed for an aqueous asphalt emulsion to dry after the emulsion has been applied to a substrate comprising contacting the emulsion with a reinforcing sheet comprising a fibrous or foraminous web or layer of material previously impregnated with an emulsion breaker.