Introduction
This category of products is mainly made by reacting butanol, methanol in a certain proportion with hydroxymethyl melamine. It has the comprehensive advantages of methyl ether and butyl ether resins, namely excellent flexibility, weather resistance, water resistance, chemical resistance, popularity, and adhesion. It can crosslink with alkyd resin, polyester resin, acrylic resin, epoxy resin, polyurethane, and cellulose, and is used to prepare oil-based, water-based, and solvent-free baking paints.
| MT 3168 |
Colorless, viscous liquid |
≥98 |
2000-4500 |
≤0.1 |
– |
Strong adhesion, used for automotive baking paint |
|
| MT 3130 |
Colorless, viscous liquid |
≥96 |
3000-6000 |
≤0.1 |
– |
Used for high solid content coatings and electrophoretic coatings |
|
| MT 3133 |
Colorless, viscous liquid |
≥96 |
800-2000 |
≤0.1 |
– |
Used for high solid content coatings, with good adhesion and flexibility |
|
Mixed Etherified Melamine Resin: Technical Overview
Mixed etherified melamine resins are versatile crosslinking agents widely used in coatings, adhesives, and composite materials. The following tables present key technical information:
1. Basic Characteristics
| Property |
Specification |
| Chemical Composition |
Melamine-formaldehyde with mixed alkoxy groups (methoxy/butoxy) |
| Appearance |
Colorless to pale yellow viscous liquid |
| Solubility |
Soluble in most organic solvents |
| Etherification Degree |
30-50% methoxy, 50-70% butoxy |
| Viscosity (25°C) |
500-3000 mPa·s |
2. Performance Advantages
| Feature |
Benefit |
| Curing Flexibility |
Wide curing temperature range (100-180°C) |
| Substrate Compatibility |
Excellent adhesion to metals, plastics |
| Film Properties |
High hardness with good flexibility |
| Storage Stability |
12+ months shelf life at room temperature |
3. Comparison with Other Melamine Resins
| Parameter |
Mixed Etherified |
Methylated |
Butylated |
| Curing Temperature |
Moderate |
High |
Low |
| Flexibility |
Excellent |
Poor |
Good |
| Solvent Compatibility |
Broad |
Limited |
Broad |
| Cost Efficiency |
Balanced |
High |
Moderate |
4. Typical Applications
| Industry |
Application Examples |
| Automotive Coatings |
Clearcoats, primer surfacers |
| Industrial Coatings |
Appliance finishes, coil coatings |
| Wood Coatings |
Furniture varnishes, flooring |
| Adhesives |
High-performance bonding systems |
5. Formulation Guidelines
| Component |
Function |
Recommended % |
| Base Resin |
Primary film former |
50-70% |
| Mixed Etherified Resin |
Crosslinker |
15-30% |
| Catalyst |
Cure accelerator |
0.5-2% |
| Additives |
Flow modifiers, etc. |
1-5% |
6. Processing Conditions
| Parameter |
Recommended Value |
| Mixing Temperature |
25-40°C |
| Curing Temperature |
120-160°C |
| Curing Time |
15-30 minutes |
| Film Thickness |
20-50 μm |
7. Limitations & Solutions
| Challenge |
Solution |
| Moisture Sensitivity |
Use sealed containers |
| Limited UV Resistance |
Combine with UV absorbers |
| Viscosity Control |
Adjust with solvents |
Conclusion
Mixed etherified melamine resins offer an optimal balance between curing performance and film properties, making them particularly suitable for applications requiring both durability and flexibility. Their versatile nature allows for use in various coating systems while maintaining good storage stability and processing characteristics.
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