Sprayable Adhesive Composition With Low-Flammability Solvent Mixing
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Solution Overview
Problem
Existing solvent-based spray adhesives face challenges in achieving low flammability and high volatility, posing health and safety risks, and require complex mixing processes.
Innovation Solution
A method involving mixing an adhesive with transdichloroethylene and trans-1-chloro-3,3,3-trifluoropropene in a sealed container, then pressurizing with carbon dioxide to create a sprayable, non-flammable composition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If solvent-based adhesives are used to achieve high volatility and fast drying, then drying time is reduced, but flammability increases causing health and safety risks
Solution Approach 1:
The patent changes the chemical parameters of the solvent system by using transdichloroethylene (a low-flammability solvent) combined with trans-1-chloro-3,3,3-trifluoropropene (a flammability reducer). This parameter change maintains the volatility needed for fast drying while significantly reducing flammability, thus resolving the contradiction between fast drying and safety
Solution Approach 2:
The patent creates a composite solvent system combining transdichloroethylene and trans-1-chloro-3,3,3-trifluoropropene in specific proportions. This composite approach leverages the high volatility of transdichloroethylene for fast drying while the trifluoropropene component suppresses flammability, achieving both fast drying and safety simultaneously
2Device complexity
If adhesive components are mixed in the container to simplify application, then mixing equipment complexity is reduced, but homogeneous mixing becomes difficult to achieve
Solution Approach 1:
The patent uses pressurized gas (nitrogen or carbon dioxide) injected into the container to agitate and mix the adhesive components. This pneumatic mixing method eliminates the need for mechanical mixing equipment while achieving homogeneous distribution of components through gas-driven turbulence and circulation
Solution Approach 2:
The system uses the pressure differential created during filling or storage to automatically induce mixing through component density differences and natural convection currents. The composition essentially mixes itself without external intervention, eliminating the need for added mixing equipment
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 method produces a sprayable adhesive with reduced flammability and volatility, eliminating the need for complex mixing equipment and ensuring safety in industrial applications.
Implementation Method 1
providing a gas propellant in the container to pressurise the mixture/composition
Implementation Method 2
The flammability of the sprayable composition may be reduced by the presence of the flammability reducer
Data Source
Figure 1
Figure 2~3
AI summary
A method for preparing a sprayable composition, the method comprising, sequentially: (i) providing a composition in a container (10), wherein the composition comprises at least one core component and at least one solvent. wherein the at least one core component comprises at least one polymer or resin; (ii) sealing the container (10); (iii) providing a flammability reducer in the container (10); and (iv) pressurising the container (10) with a gas propellant.