Difference Between Melamine and Melamine Resin
1. Chemical Structure & Composition
- Melamine
- Chemical formula: C3H6N6C3H6N6
- A small organic compound with a triazine ring and three amino (−NH2−NH2) groups.
- White crystalline powder, slightly soluble in water.
- Melamine Resin (Melamine-Formaldehyde Resin, MF Resin)
- A thermosetting polymer formed by the condensation reaction of melamine and formaldehyde.
- No fixed chemical formula (a cross-linked 3D network structure).
2. Synthesis
- Melamine is produced industrially from urea under high temperature and pressure.
- Melamine Resin is synthesized by reacting melamine with formaldehyde (with catalysts like acid or base).
3. Key Properties
|
Property |
Melamine |
Melamine Resin |
|
Solubility |
Slightly soluble in water |
Insoluble after curing |
|
Thermal Stability |
Decomposes at ~350°C |
Heat-resistant (up to ~200°C) |
|
Mechanical Strength |
Brittle crystals |
Hard, scratch-resistant |
|
Toxicity |
Toxic if ingested (e.g., kidney damage) |
Non-toxic when fully cured (but residual formaldehyde may be a concern) |
4. Applications
- Melamine
- Raw material for melamine resin.
- Flame retardant (when combined with phosphates).
- Melamine Resin
- Laminates: Countertops, furniture surfaces (e.g., Formica).
- Dinnerware: Melamine tableware (mimics porcelain but lightweight).
- Adhesives & Coatings: Water-resistant wood glue, industrial coatings.
- Textiles & Paper: Improves wrinkle and flame resistance.
5. Summary
|
Aspect |
Melamine |
Melamine Resin |
|
Nature |
Small molecule |
Polymer (cross-linked) |
|
Stability |
Soluble, decomposes |
Thermoset (insoluble when cured) |
|
Uses |
Chemical precursor |
Final product (plastics, coatings) |
|
Safety |
Toxic in high doses |
Safe if properly cured |
Melamine resin is the polymerized, industrially useful form of melamine, offering durability and heat resistance, while pure melamine is a chemical intermediate with limited direct applications.
Post time: Apr-10-2025
