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High reactivity with hydroxyl-functional resins for rapid cure at low to medium baking temperatures.
Excellent compatibility with acrylic, polyester, and alkyd resin systems.
Low formaldehyde emission profile meeting stringent environmental and regulatory requirements.
Superior storage stability in solvent-based formulations without premature self-condensation.
Provides outstanding hardness, chemical resistance, and gloss retention in cured films.
Automotive OEM clearcoats and basecoats requiring high durability and appearance.
Industrial coil coatings for metal substrates demanding fast line speeds and corrosion resistance.
Appliance finishes where excellent mar resistance and long-term color stability are critical.
General-purpose can coatings for food and beverage containers with FDA-compliant formulation potential.
Wood furniture and panel coatings requiring balanced flow, leveling, and crosslink density.
| Chemical Type | Methylated melamine-formaldehyde resin |
| Product Form | Liquid |
| Appearance | Clear, water-white to pale yellow liquid |
| Solvent Content | Proprietary aromatic hydrocarbon blend |
| Non-Volatile Content (wt%) | 75–79% |
| Viscosity (25°C, mPa·s) | 80–120 |
| Acid Number (mg KOH/g) | < 1.0 |
| Key Features | Low-bake reactivity, low formaldehyde release, high compatibility |
Q1: What is the primary function of CYMEL UI-19-I in coating formulations?
A: CYMEL UI-19-I is a highly reactive, low-viscosity melamine-formaldehyde amino resin designed primarily as a crosslinker for thermosetting systems. It enables rapid cure at moderate temperatures and enhances hardness, chemical resistance, and gloss retention—especially in high-performance industrial and coil coatings.
Q2: Which binder resins is CYMEL UI-19-I typically compatible with?
A: CYMEL UI-19-I exhibits excellent compatibility with common hydroxyl- and carboxyl-functional resins, including polyester, acrylic, alkyd, and polyurethane dispersions. Its low viscosity and high reactivity make it particularly suitable for solvent-borne and high-solids formulations where flow and leveling are critical.
Q3: Does CYMEL UI-19-I require an acid catalyst to cure effectively?
A: Yes—like most melamine crosslinkers, CYMEL UI-19-I benefits from catalysis to achieve efficient curing at practical temperatures. Commonly used catalysts include weak organic acids (e.g., p-toluenesulfonic acid or blocked sulfonic acids), and dosage is adjusted based on desired pot life, cure schedule, and substrate sensitivity.
Q4: How should CYMEL UI-19-I be stored to maintain stability and performance?
A: Store in tightly sealed containers under cool, dry conditions (typically below 30 °C) and protect from prolonged exposure to moisture or strong alkaline environments. Avoid freezing, as crystallization may occur and require gentle warming and thorough mixing before use.
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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
