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| OEM | OEM Services Provided |
| Feature | Good stability |
| Classification | Paint Additives |
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Urea resin adhesive is a liquid adhesive which is produced by reacting urea with formaldehyde using a special catalyst and denaturant under strictly controlled conditions. It is suitable as plywood adhesive with excellent water resistance when a catalyst and appropriate amount of extender are added.
Urea Resin Adhesive: Overview and Key Properties
| Category | Details |
|---|---|
| Chemical Type | Thermosetting amino resin (urea-formaldehyde) |
| Appearance | Colorless to pale yellow liquid/powder |
| Solid Content | 50-65% (liquid), >95% (powder) |
| Curing Mechanism | Heat-activated polycondensation |
Key Performance Properties
| Property | Value |
|---|---|
| Gel Time (100°C) | 30-120 sec |
| pH | 7.5-9.0 |
| Viscosity (25°C) | 150-500 mPa·s |
| Bond Strength | 2.0-3.5 MPa (wood-to-wood) |
| Water Resistance | Class D2-D3 (EN 204) |
Formulation Components
| Component | Function | Content (%) |
|---|---|---|
| Urea Resin | Base polymer | 70-85 |
| Fillers | Viscosity control | 10-20 |
| Catalysts | Cure accelerator (NH₄Cl) | 0.5-2 |
| Modifiers | Flexibility enhancer | 1-5 |
Processing Parameters
| Parameter | Optimal Range |
|---|---|
| Press Temperature | 100-130°C |
| Press Pressure | 0.5-1.2 MPa |
| Press Time | 15-40 sec/mm thickness |
| Moisture Content | 6-10% (substrate) |
Applications
| Industry | Use Case | Key Advantage |
|---|---|---|
| Woodworking | Plywood, particleboard | Fast curing |
| Furniture | Laminated surfaces | Low cost |
| Packaging | Paper bonding | Colorless bond line |
| Textiles | Fabric stiffening | High hardness |
Comparison with Competing Resins
| Property | Urea Resin | Melamine Resin | Phenol Resin |
|---|---|---|---|
| Cost | $ | $$ | $ |
| Cure Speed | Fastest | Fast | Slow |
| Water Resistance | Moderate | High | Very High |
| Formaldehyde Emission | Highest | Medium | Lowest |
Safety & Compliance
| Parameter | Specification |
|---|---|
| Formaldehyde Emission | E1-E2 (CARB/EPA) |
| Storage Life | 2-4 months (liquid), 6-12 months (powder) |
| Handling PPE | Gloves, goggles, ventilation |
Market Data
| Region | Market Share | Growth (CAGR) |
|---|---|---|
| Asia-Pacific | 60% | 4.5% |
| Europe | 25% | 2.8% |
| North America | 10% | 3.1% |
Advantages vs. Limitations
| Advantages | Limitations |
|---|---|
| Lowest cost amino resin | Higher formaldehyde emission |
| Rapid curing cycle | Limited outdoor durability |
| Colorless bonds | Hygroscopic nature |
Summary
Urea resin adhesives remain the most economical choice for indoor wood composites, offering fast processing and clear bond lines. While facing environmental challenges due to formaldehyde emissions, low-VOC formulations are expanding their market viability.
Declaration: The products displayed on this website are intended exclusively for industrial applications or scientific research. They are not intended for medical, pharmaceutical, or food use. In accordance with applicable laws and regulations, purchasing organizations must hold valid qualifications and approvals.
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