Acrylic Adhesive with Isocyanate-Reactive Groups for Direct Polyurethane Bonding
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Solution Overview
Problem
Current methods for achieving rigidity in acrylic compositions, such as using fiber-reinforced plastic (FRP) or polyurethane, are labor-intensive and environmentally problematic, and require additional costly steps like ABS lamination for adhesion, which increases time and cost.
Innovation Solution
Acrylic compositions with a multifunctional chain transfer agent that can directly bond with isocyanate-containing compositions like polyurethane, eliminating the need for additional lamination steps and improving adhesion efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If polyurethane is applied directly to acrylic composition, then rigidity is improved, but adhesion is poor
Solution Approach 1:
The invention changes the chemical parameters of the acrylic composition by incorporating specific functional groups (isocyanate-reactive groups such as hydroxyl, carboxyl, or amino groups) that enable direct chemical bonding with polyurethane, thereby achieving both rigidity and adhesion without additional lamination steps
2Reliability
If ABS lamination is applied prior to polyurethane, then adhesion is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The invention extracts and eliminates the intermediate ABS lamination step from the manufacturing process by endowing the acrylic composition itself with direct polyurethane-bonding capability through the incorporation of isocyanate-reactive functional groups, simplifying the process to a direct two-layer system
Solution Approach 2:
The acrylic composition is designed to perform multiple functions: it provides the base structure, ensures adhesion through isocyanate-reactive groups, and eliminates the need for separate lamination layers, making the system more universal and efficient
3Strength
If FRP is applied to acrylic composition, then rigidity is improved, but environmental harm and labor intensity increase
Solution Approach 1:
The invention changes the material composition parameters by using polyurethane instead of FRP, eliminating styrene emissions and associated environmental hazards while maintaining rigidity enhancement
Solution Approach 2:
The invention converts the previously harmful combination (FRP with styrene emissions) into a beneficial alternative (polyurethane with no styrene emissions), transforming an environmentally harmful process into a clean, sustainable manufacturing approach
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 solution enables direct bonding between acrylic and polyurethane compositions, enhancing adhesion strength and reducing manufacturing time and costs, while minimizing environmental impact.
Implementation Method 1
acrylic compositions having a multifunctional chain transfer agent with an isocyanate-reactive group in a sufficient amount to bond directly to an isocyanate-containing composition
Implementation Method 2
the chain transfer agent residue comprises a reacted isocyanate-reactive group that has reacted with an isocyanate bound within the polyurethane composition
Data Source
AI summary
The present invention relates to acrylic compositions capable of bonding directly with an isocyanate-containing composition, e.g. polyurethane, and methods for manufacturing the same. The acrylic compositions of the invention have multifunctional chain transfer agents and/or multifunctional crosslinkers with isocyanate-reactive groups.