Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

Allnex CYMEL U-663 Amino Resin

Allnex CYMEL U-663 is a high-performance methylated melamine-formaldehyde amino resin from the CYMEL® series, engineered for exceptional cure speed, hardness, and chemical resistance in coil and can coatings. It offers low viscosity, excellent compatibility with polyester and acrylic resins, and superior overbake stability—ideal for demanding industrial baking applications.
  • allnex cymel u 663 amino resin_c2b31feb
  • allnex cymel u 663 amino resin_c2b31feb

Features Of Allnex CYMEL U-663 Amino Resin

  1. High reactivity with hydroxyl-functional resins, enabling fast cure at low to medium baking temperatures.

  2. Excellent compatibility with acrylic, polyester, and alkyd resin systems for broad formulation flexibility.

  3. Delivers superior hardness, chemical resistance, and gloss retention in cured coatings.

  4. Low formaldehyde emission profile, supporting compliance with stringent environmental and occupational safety requirements.

  5. Good storage stability in solvent-based systems when properly formulated and handled.

Typical Applications Of Allnex CYMEL U-663 Amino Resin

  1. Automotive OEM and refinish topcoats requiring high durability and appearance performance.

  2. Industrial maintenance coatings for metal substrates exposed to harsh environments.

  3. Appliance coatings where excellent chip resistance and smooth film formation are critical.

  4. General-purpose coil coatings for pre-painted steel and aluminum substrates.

  5. High-performance can coatings for food and beverage packaging applications.

Specifications Of Allnex CYMEL U-663 Amino Resin

Chemical TypeMethylated melamine-formaldehyde resin
Product FormLiquid
AppearanceClear, pale yellow liquid
Solvent ContentButanol / xylene blend
Non-Volatile Content (wt%)80–84%
Viscosity (25°C, mPa·s)1,000–2,500
Acid Number (mg KOH/g)< 5
Primary ApplicationsCrosslinker for hydroxyl-containing resin systems


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