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Highly reactive melamine-formaldehyde resin with low formaldehyde content.
Excellent compatibility with acrylic, polyester, and alkyd resins.
Enables fast cure at moderate baking temperatures (120–150 °C).
Delivers superior hardness, chemical resistance, and gloss retention in cured films.
Designed for low-viscosity formulations, supporting high-solids and solvent-reduced coatings.
Automotive OEM and refinish topcoats.
Industrial coil coatings for metal substrates.
Appliance coatings requiring durable, glossy finishes.
General-purpose can coatings for food and beverage containers.
High-performance wood and plastic coatings.
| Chemical Type | Melamine-formaldehyde crosslinker |
| Product Form | Liquid |
| Appearance | Clear to slightly hazy, water-white liquid |
| Solvent Content | Butanol-based solution |
| Non-Volatile Content (NV) | Approx. 80 wt% (as supplied) |
| Viscosity (25 °C) | ~100–200 mPa·s |
| Acid Number | <1 mg KOH/g |
| Storage Stability | Stable at 20–25 °C for ≥6 months in sealed container |
Q1: What is the primary function of CYMEL U-80 in coating formulations?
A: CYMEL U-80 acts as a highly reactive crosslinker for hydroxyl- and amide-functional resins—such as acrylics, polyesters, and alkyds—enabling robust thermoset film formation at moderate curing temperatures. Its low formaldehyde content and good storage stability make it suitable for high-performance industrial and coil coatings.
Q2: How does CYMEL U-80 differ from other melamine-formaldehyde resins like CYMEL 303 or CYMEL 325?
A: CYMEL U-80 is a partially alkylated, high-imino melamine resin with enhanced reactivity and reduced volatility compared to fully alkylated types. It offers faster cure response under thermal conditions while maintaining better compatibility and lower viscosity than many conventional hexamethoxymethylmelamine (HMMM) derivatives.
Q3: Is CYMEL U-80 compatible with acid-catalyzed systems?
A: Yes—CYMEL U-80 is commonly used with strong or weak organic acid catalysts (e.g., p-toluenesulfonic acid or blocked sulfonic acids) to accelerate crosslinking. Catalyst selection and dosage should be optimized based on cure schedule, substrate sensitivity, and desired pot life.
Q4: What are typical handling and storage recommendations for CYMEL U-80?
A: Store in tightly sealed containers at temperatures between 5 °C and 30 °C, away from direct sunlight and moisture. Prolonged exposure to humidity or elevated temperatures may lead to viscosity increase or premature condensation. Always follow good industrial hygiene practices during handling.
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E-mail: wangxingqiang@ericwchem.com
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Building A1, Jiete Industrial Park, Huangpu District, Guangzhou City, Guangdong Province, China
