Low GWP Sprayable Adhesive Composition and Method
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Solution Overview
Problem
The adhesive industry faces challenges in preparing solvent-based spray adhesives with high volatility and flammability, and there is a need for alternatives to high global warming potential (GWP) propellants, particularly hydrofluorocarbons (HFCs), which pose health and environmental risks.
Innovation Solution
A method involving a sprayable composition with a core component, a solvent, a flammability reducer, and a low GWP gas propellant, where the composition is mixed and pressurized in a sealed container to reduce flammability and volatility, using trans-1-chloro-3,3,3-trifluoropropene as the flammability reducer and carbon dioxide as the propellant.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If solvent-based adhesives are used to achieve high volatility and fast drying time, then the drying time is reduced, but the flammability increases causing health and safety risks
Solution Approach 1:
The patent changes the chemical composition parameters by incorporating flammability reducers (such as phosphorus-containing compounds or nitrogen-containing compounds) into the solvent-based adhesive formulation. This modifies the adhesive's properties to maintain volatility and fast drying time while reducing flammability to acceptable safety levels.
2Productivity
If hydrofluorocarbons (HFCs) are used as propellants to achieve effective spray delivery, then the spray performance is improved, but the global warming potential increases significantly
Solution Approach 1:
The patent substitutes HFC propellants with alternative propellants that have lower global warming potential, such as hydrofluoroolefins (HFOs) or other environmentally friendly propellants. This changes the propellant parameters to maintain effective spray delivery performance while reducing GWP to comply with environmental regulations.
3Manufacturing precision
If expensive mixing equipment is used to ensure homogeneous composition, then the mixing precision is improved, but the manufacturing cost increases
Solution Approach 1:
The patent enables the composition components to self-mix or self-homogenize through their inherent physical properties, such as mutual solubility or density differences, eliminating the need for expensive external mixing equipment. The composition achieves homogeneous mixing through its own characteristics during normal handling and application.
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 effectively reduces the flammability and volatility of the sprayable composition, eliminating the need for expensive mixing equipment and providing a homogeneous, non-flammable adhesive, while also mitigating the use of high GWP propellants, thus addressing safety and environmental concerns.
Implementation Method 1
pressurizing the container with a gas propellant
Data Source
AI summary
A system may include a pre-pressurized canister filled with one or more polymeric materials and one or more low global warming potential (GWP) propellants. The one or more low GWP propellants may include at least one of carbon dioxide, nitrogen, or trans-1-Chloro-3,3,3-trifluoropropene. The system may include a valve sub-system including a dispensing valve configured to couple to the pre-pressurized canister and a valve control mechanism configured to regulate a pressure of the pre-pressurized canister to cause the pre-pressurized canister to release the one or more polymeric materials. The system may include a dispensing sub-system configured to fluidically couple the pre-pressurized canister to the valve sub-system. The dispensing sub-system may include a dispensing hose coupled to the dispensing valve and a dispensing member coupled to the dispensing hose. The dispensing member may be configured to dispense the one or more polymeric materials contained within the pre-pressurized canister.