Overview
Three component and water based polyurethane adhesive for metal is a high-performance bonding system designed for structural applications where strong adhesion, flexibility, and chemical resistance are required. The system typically contains:
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Component A: Polyol blend (water-dispersible polyols)
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Component B: Isocyanate crosslinker (blocked or emulsifiable type)
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Component C: Special catalyst / additive package
This adhesive is widely used in metal-to-metal, metal-to-composite, and metal-to-porous material bonding operations.
Meaning
This adhesive system refers to a waterborne, low-VOC, environmentally friendly polyurethane bonding material that is activated through a three-component reaction, forming a strong polyurethane polymer network on metal surfaces.
Applications
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Metal fabrication
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Automotive metal bonding
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HVAC and duct assembly
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Appliances
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Furniture metal parts
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Construction metal fittings
Properties
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High tensile strength
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Excellent metal adhesion
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Good heat resistance
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Chemical resistance
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Low VOC & eco-friendly
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Flexible and impact-resistant cured film
Ingredients of Three Component and Water Based Polyurethane Adhesive for Metal
Component A (Polyol Dispersion)
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Water-dispersible polyester polyol
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Acrylic polyol dispersion (optional)
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Defoamer
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Wetting agent
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Surfactant
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Thickener or rheology modifier
Component B (Isocyanate Crosslinker)
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Hydrophilic aliphatic polyisocyanate
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Blocked isocyanate (for longer pot life)
Component C (Catalyst & Additives)
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Organometallic or amine catalyst
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Antifoam
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Anti-corrosion additives
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Coalescent (if needed)
Making Procedure
Step 1 — Preparation of Component A
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Charge water into a mixing tank.
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Add dispersing agents, surfactants, and wetting agents.
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Introduce waterborne polyol slowly while mixing.
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Adjust viscosity using rheology modifiers.
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Defoam if required.
Step 2 — Component B Preparation
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Use pre-modified hydrophilic polyisocyanate.
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Filter and store in moisture-free packaging.
Step 3 — Component C Preparation
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Blend catalyst and performance additives.
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Ensure homogeneity.
Step 4 — Adhesive Preparation (At Application Point)
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Mix Component A + Component C first.
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Add Component B last while stirring slowly.
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Allow maturation for a few minutes.
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Apply to metal surfaces before pot life expires.
Production Process
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Water-phase preparation
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Polyol dispersion
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Additive incorporation
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Component separation (A/B/C storage)
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Quality control (viscosity, solid content, NCO content)
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Packaging
Summary
Three component and water based polyurethane adhesive for metal offers strong, durable, eco-friendly bonding for industrial metal applications. Its modular A/B/C component structure provides adjustable curing speed, flexibility, and high performance while remaining safe and low-VOC. Due to its superior chemical and mechanical properties, it is preferred in automotive, construction, electronics, and metal fabrication industries.
