Improve Structural Adhesive Strength with Impact Modifiers

PARALOID™ Acrylic Impact Modifiers provide an advanced solution, offering formulators a reliable way to balance adhesive strength and toughness, ensuring that structural adhesives can withstand thermal, mechanical, and environmental stress. 

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Role of Impact Modifiers in Structural Adhesives 

Structural adhesives from epoxies and acrylates are widely used for bonding metals, plastics, and composites. However, these systems can be inherently brittle, limiting performance under impact or peel stress. Impact modifiers work by introducing a toughening mechanism within the adhesive matrix. Acrylic impact modifiers like PARALOID™ Impact Modifiers form discrete rubbery domains that absorb and dissipate energy, reducing crack propagation and increasing resistance to sudden stresses. 

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Epoxy Adhesives 

Epoxy adhesives are strong but brittle. PARALOID™ Impact Modifiers improve impact resistance, peel strength, and crack resistance without significantly reducing tensile strength. Epoxy adhesives are primarily used for metal-to-metal and composite structural bonding in automotive, aerospace, and construction. 
 

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Acrylic (Methacrylate) Adhesives 

Acrylic adhesives already have good adhesion and fast cure but can lack toughness. PARALOID™ Impact Modifiers enhance the durability and toughness under peel, shock, or vibration stress. Typically used to bond plastics, composites, and metals in transportation, wind energy, and industrial assembly. 

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Why Choose PARALOID™ Acrylic Impact Modifiers? 

• Improved Impact Resistance & Toughness: Enhance adhesive formulations by reducing brittleness and improving crack resistance. 
• Enhanced Peel & Shear Strength: Allow adhesives to maintain high bond strength even under stress conditions. 
• Thermal & Environmental Stability: Maintain adhesive performance under high temperatures, humidity, and aggressive chemicals. 
• Dispersibility: Easy to disperse core-shell-rubber particles into formulations without compromising adhesive cure or viscosity. 

 

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Applications in Structural Adhesives 

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Conclusion

As industries demand lighter, stronger, and more durable bonded structures, the role of impact modifiers in structural adhesives becomes critical. PARALOID™ Acrylic Impact Modifiers  deliver the toughness and reliability needed for adhesives to perform under the most demanding conditions. Click the button to talk to a technical expert today about which grade works best for your adhesive formulation.