Introduction
This category of products is mainly made by reacting butanol, methanol in a certain proportion with hydroxymethyl melamine.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 |
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MT 3130 | Colorless, viscous liquid | ≥96 | 3000-6000 | ≤0.1 | – | Used for high solid content coatings and electrophoretic coatings |
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MT 3133 | Colorless, viscous liquid | ≥96 | 800-2000 | ≤0.1 | – | Used for high solid content coatings, with good adhesion and flexibility |
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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 |
