Two-Component Acrylic Adhesive Composition for High Strength Bonding
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Solution Overview
Problem
Two-component acrylic adhesives have limitations in terms of lap shear strength and adherence compared to one-component epoxy adhesives and urethane adhesives, making them less suitable for applications requiring strong adherence and high elongation, such as vehicular structures, and there is a trade-off between flexibility/toughness and strength in adhesive compositions.
Innovation Solution
A two-component adhesive composition comprising a (meth)acrylate-based monomer mixture with an alkyl (meth)acrylate compound, a urethane acrylate oligomer, an adhesive reinforcing agent like rubber, and a filler, combined with an epoxy resin and initiator, with a specific weight ratio, to enhance lap shear strength and adherence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a gummy polymer is added to increase flexibility and toughness in adhesive composition, then flexibility and toughness are improved, but modulus and final strength are adversely affected
Solution Approach 1:
The patent changes the chemical composition parameters by incorporating specific ratios of (meth)acrylate monomers, epoxy resin, and adhesive reinforcing agents. This chemical parameter optimization allows achieving both flexibility and strength without the need for gummy polymers that would compromise final strength.
Solution Approach 2:
The patent creates a composite adhesive system combining (meth)acrylate-based monomers with epoxy resin and adhesive reinforcing agents. This composite formulation synergistically provides both flexibility and high strength, resolving the contradiction between these properties.
2Productivity
If two-component acrylic adhesive is used to achieve rapid hardening and large area adhesion, then hardening speed and adhesion area are improved, but adherence strength is lower compared to one-component epoxy adhesives
Solution Approach 1:
The patent merges the advantages of two-component acrylic adhesives (rapid hardening, large area adhesion) with strength-enhancing components. By combining (meth)acrylate monomers with epoxy resin and adhesive reinforcing agents, the formulation achieves both rapid setting and high adherence strength.
Solution Approach 2:
The patent formulates a composite adhesive system that integrates multiple chemical components to simultaneously achieve rapid hardening, large area adhesion, and high adherence strength. The composite nature of the adhesive allows optimizing multiple properties that would be contradictory in single-component systems.
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 composition achieves excellent lap shear strength and adherence, suitable for various applications including vehicles, construction, and wind power, by balancing strength and flexibility, and improving wetting characteristics and mechanical properties.
Implementation Method 1
a second part including components (b1) and (b2) below: (b1) 100 parts by weight of an epoxy resin, and (b2) 50 to 150 parts by weight of an initiator with respect to (b1)
Implementation Method 2
a first part including components (a1) to (a3) below: (a1) 100 parts by weight of a (meth)acrylate-based monomer mixture including (a11) an alkyl (meth)acrylate compound
Data Source
AI summary
An acryl-based adhesive composition includes an acrylate-based compound of a specific component to achieve excellent lap shear strength and adherence.