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 |
|
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 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 |
