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TWO-component Polyurethane Adhesive is a high-strength structural bonding system consisting of a polyol resin component and an isocyanate hardener component, formulated to create durable bonds across industrial and construction applications. This system operates on a polyaddition reaction mechanism, where hydroxyl groups in the polyol react with isocyanate groups to form urethane linkages, resulting in elastomeric or rigid cured adhesives depending on formulation. Available with mix ratios ranging from 1:1 to 10:1 by volume, it accommodates diverse processing needs, from manual mixing to automated dispensing. Cured adhesives exhibit tensile strength ≥10 MPa and elongation at break ≥200%, with low viscosity (500–5,000 cps) ensuring excellent wetting of substrates like metal, composites, and concrete. Its fast curing (≤30 minutes to handling strength) supports high-volume manufacturing, while its versatility makes it suitable for both structural and semi-structural bonding applications .
Multi-Material Bonding Capability
This adhesive achieves exceptional adhesion across dissimilar materials, with lap shear strength ≥15 MPa on 6061 aluminum alloys and ≥12 MPa on carbon fiber-reinforced polymers (CFRP)—performance metrics that outpace traditional epoxy adhesives in many industrial scenarios. It bonds effectively to cold-rolled steel, glass-reinforced plastic (GRP), ceramics, and treated wood, eliminating the need for substrate-specific adhesives. Its ability to bridge material differences reduces inventory complexity and ensures consistent bonding performance in multi-material assemblies .
Chemical and Environmental Durability
Cured adhesives resist degradation from mineral acids (pH 2–12), alkaline solutions, diesel fuel, and hydraulic fluids, maintaining bond integrity after 1,000 hours of immersion testing. They withstand salt spray exposure (ASTM B117) for ≥1,000 hours without delamination, making them suitable for outdoor and marine applications. Select formulations meet FMVSS 302 automotive flammability standards (flame spread ≤100mm/min), ensuring compliance in interior vehicle components .
Processing Versatility
Available in fast-cure (≤10 minutes to handling) and slow-cure (≥60 minutes to handling) variants, this adhesive adapts to application complexity:
Fast-cure grades suit high-speed assembly lines in automotive and electronics manufacturing.
Slow-cure grades provide extended open times (5–60 minutes), enabling precise positioning in large-scale construction projects.
Compatible with static mixing nozzles, meter-mix dispensing systems, and manual mixing tools, it integrates seamlessly into diverse production environments .
Low Environmental Impact
Solvent-free formulations emit ≤5 ppm VOCs, meeting UL GREENGUARD Gold standards for indoor air quality and EU Ecolabel requirements for low-emission products. They contain no hazardous air pollutants (HAPs) or heavy metals, simplifying regulatory compliance. Food-contact compliant grades meet FDA 21 CFR 177.2600 standards, enabling use in packaging and food processing equipment assembly .
Automotive Manufacturing
Body-in-White Bonding: Replaces traditional spot welding in aluminum-intensive vehicle structures, reducing vehicle weight by approximately 15% while maintaining crash energy absorption ≥50 J/cm³. This contributes to improved fuel efficiency and reduces manufacturing complexity .
Battery Pack Assembly: Bonds lithium-ion cell modules to cooling plates in electric vehicle batteries, providing thermal conductivity ≥1.2 W/m·K for effective heat dissipation and electrical insulation ≥10⁶ Ω·cm to prevent short circuits .
Precast Concrete Joints: Seals connections between precast concrete bridge segments and building panels, forming watertight bonds with compressive strength ≥30 MPa and movement accommodation ±25% to withstand thermal expansion and contraction .
Wind Turbine Blade Assembly: Bonds fiberglass composite sections in turbine blades, withstanding fatigue loads ≥10⁶ cycles at 10 MPa stress—critical for ensuring 20+ year service life in renewable energy infrastructure .
Industrial Equipment Assembly
Pump and Valve Repair: Restores worn metal surfaces in industrial pumps and valves, with wear resistance ≥50 mg/1000 cycles (Taber CS-17 wheel, 1kg load), extending equipment service life by 2–3 times compared to uncoated components .
Railway Component Bonding: Attaches rubber vibration pads to steel bogie frames, damping vibrations at frequencies ≥50 Hz and reducing noise transmission in passenger rail systems .
Container Requirements: Store resin and hardener components in separate sealed containers—resin in HDPE or stainless steel, hardener in stainless steel to prevent corrosion.
Environmental Conditions: Maintain storage temperatures between 5–25°C; avoid freezing, as this may cause hardener crystallization. Protect from direct sunlight to prevent premature polymerization.
Handling Precautions: Keep components separate until ready for use; avoid cross-contamination between resin and hardener containers. Use static mixing nozzles for automated systems to ensure uniform component dispersion.
Parameter | Rigid Grade | Flexible Grade |
Appearance | Clear resin + amber hardener | Milky resin + black hardener |
Mix Ratio (vol.) | 2:1 | 1:1 |
Viscosity (25°C) | 1,500–3,000 cps | 500–1,000 cps |
Cure Time (23°C) | 20–30 minutes | 60–90 minutes |
Tensile Strength | ≥20 MPa | ≥10 MPa |
Elongation at Break | ≥50% | ≥300% |
TWO-component Polyurethane Adhesive is a high-strength structural bonding system consisting of a polyol resin component and an isocyanate hardener component, formulated to create durable bonds across industrial and construction applications. This system operates on a polyaddition reaction mechanism, where hydroxyl groups in the polyol react with isocyanate groups to form urethane linkages, resulting in elastomeric or rigid cured adhesives depending on formulation. Available with mix ratios ranging from 1:1 to 10:1 by volume, it accommodates diverse processing needs, from manual mixing to automated dispensing. Cured adhesives exhibit tensile strength ≥10 MPa and elongation at break ≥200%, with low viscosity (500–5,000 cps) ensuring excellent wetting of substrates like metal, composites, and concrete. Its fast curing (≤30 minutes to handling strength) supports high-volume manufacturing, while its versatility makes it suitable for both structural and semi-structural bonding applications .
Multi-Material Bonding Capability
This adhesive achieves exceptional adhesion across dissimilar materials, with lap shear strength ≥15 MPa on 6061 aluminum alloys and ≥12 MPa on carbon fiber-reinforced polymers (CFRP)—performance metrics that outpace traditional epoxy adhesives in many industrial scenarios. It bonds effectively to cold-rolled steel, glass-reinforced plastic (GRP), ceramics, and treated wood, eliminating the need for substrate-specific adhesives. Its ability to bridge material differences reduces inventory complexity and ensures consistent bonding performance in multi-material assemblies .
Chemical and Environmental Durability
Cured adhesives resist degradation from mineral acids (pH 2–12), alkaline solutions, diesel fuel, and hydraulic fluids, maintaining bond integrity after 1,000 hours of immersion testing. They withstand salt spray exposure (ASTM B117) for ≥1,000 hours without delamination, making them suitable for outdoor and marine applications. Select formulations meet FMVSS 302 automotive flammability standards (flame spread ≤100mm/min), ensuring compliance in interior vehicle components .
Processing Versatility
Available in fast-cure (≤10 minutes to handling) and slow-cure (≥60 minutes to handling) variants, this adhesive adapts to application complexity:
Fast-cure grades suit high-speed assembly lines in automotive and electronics manufacturing.
Slow-cure grades provide extended open times (5–60 minutes), enabling precise positioning in large-scale construction projects.
Compatible with static mixing nozzles, meter-mix dispensing systems, and manual mixing tools, it integrates seamlessly into diverse production environments .
Low Environmental Impact
Solvent-free formulations emit ≤5 ppm VOCs, meeting UL GREENGUARD Gold standards for indoor air quality and EU Ecolabel requirements for low-emission products. They contain no hazardous air pollutants (HAPs) or heavy metals, simplifying regulatory compliance. Food-contact compliant grades meet FDA 21 CFR 177.2600 standards, enabling use in packaging and food processing equipment assembly .
Automotive Manufacturing
Body-in-White Bonding: Replaces traditional spot welding in aluminum-intensive vehicle structures, reducing vehicle weight by approximately 15% while maintaining crash energy absorption ≥50 J/cm³. This contributes to improved fuel efficiency and reduces manufacturing complexity .
Battery Pack Assembly: Bonds lithium-ion cell modules to cooling plates in electric vehicle batteries, providing thermal conductivity ≥1.2 W/m·K for effective heat dissipation and electrical insulation ≥10⁶ Ω·cm to prevent short circuits .
Precast Concrete Joints: Seals connections between precast concrete bridge segments and building panels, forming watertight bonds with compressive strength ≥30 MPa and movement accommodation ±25% to withstand thermal expansion and contraction .
Wind Turbine Blade Assembly: Bonds fiberglass composite sections in turbine blades, withstanding fatigue loads ≥10⁶ cycles at 10 MPa stress—critical for ensuring 20+ year service life in renewable energy infrastructure .
Industrial Equipment Assembly
Pump and Valve Repair: Restores worn metal surfaces in industrial pumps and valves, with wear resistance ≥50 mg/1000 cycles (Taber CS-17 wheel, 1kg load), extending equipment service life by 2–3 times compared to uncoated components .
Railway Component Bonding: Attaches rubber vibration pads to steel bogie frames, damping vibrations at frequencies ≥50 Hz and reducing noise transmission in passenger rail systems .
Container Requirements: Store resin and hardener components in separate sealed containers—resin in HDPE or stainless steel, hardener in stainless steel to prevent corrosion.
Environmental Conditions: Maintain storage temperatures between 5–25°C; avoid freezing, as this may cause hardener crystallization. Protect from direct sunlight to prevent premature polymerization.
Handling Precautions: Keep components separate until ready for use; avoid cross-contamination between resin and hardener containers. Use static mixing nozzles for automated systems to ensure uniform component dispersion.
Parameter | Rigid Grade | Flexible Grade |
Appearance | Clear resin + amber hardener | Milky resin + black hardener |
Mix Ratio (vol.) | 2:1 | 1:1 |
Viscosity (25°C) | 1,500–3,000 cps | 500–1,000 cps |
Cure Time (23°C) | 20–30 minutes | 60–90 minutes |
Tensile Strength | ≥20 MPa | ≥10 MPa |
Elongation at Break | ≥50% | ≥300% |
