CYMEL® 232 Resin

CYMEL® 232 resin is a highly alkylated methoxy butoxy melamine-formaldehyde resin designed for various applications requiring low VOC (Volatile Organic Compounds) systems, high film flexibility, and optimized recoat adhesion. Here's a breakdown of its properties and applications:

Product Description:

• CYMEL® 232 resin is characterized by its high degree of alkylation and high monomer content.
• It is recommended for low VOC systems and applications requiring high film flexibility and optimized recoat adhesion.
• More hydrophobic than CYMEL® 285-100, it is suitable for achieving high glossy finishes and good water and humidity resistance films, especially in electro-deposition coatings.

Benefits:

• Good Salt-Spray Resistance
• Good flow and leveling properties
• Good recoat adhesion
• Low Free Formaldehyde
• Good flexibility properties

Application Areas:

• AED (Automotive Electro-Deposition) Coating for glossy finishes
• General Metal Finishes

Physical Properties:

• Appearance: Clear Liquid
• Non-volatile by weight: Minimum 97%
• Viscosity at 25°C: R – W Gardner Holdtz
• Free formaldehyde: Less than 0.1%
• Color, Gardner: Less than or equal to 1

Solubility:

• Complete solubility in alcohols, esters, ketones, aromatic hydrocarbons, and aliphatic hydrocarbons
• Insoluble in water

Compatibility:

• Very good compatibility with acrylic resins, alkyd resins, epoxy resins, and polyester resins

Backbone Polymer Selection:

• CYMEL® 232 resin serves as a versatile crosslinking agent for various polymeric materials containing carboxyl, hydroxyl, or amide functionalities, such as acrylic, alkyd, polyester, and epoxy resins.

Catalysis:

• Cross-linking reaction requires strong acid catalysts such as CYCAT® 4040 catalyst, CYCAT® 600 catalyst, and CYCAT® 500 catalyst.
• Typically, 0.2% to 0.4% strong acid on binder solids is recommended for a 15-20 minute bake schedule at 120°C to 150°C.

Formulation Stability:

• Stability can be improved by using a blocked acid catalyst or by adding a stabilizing alcohol to the formulation.

Storage Stability:

• Shelf life of 540 days from the date of manufacture when stored at temperatures between 5°C and 30°C in unopened original containers.
• Must be kept indoors and protected from direct sunlight exposure.

Safety and Handling:

• Consult the Safety Data Sheet (SDS) for safety, health, and environmental data available from allnex.

In summary, CYMEL® 232 resin offers excellent performance properties, compatibility, and formulation stability, making it suitable for various coating applications requiring flexibility, adhesion, and resistance to environmental factors. Proper storage, handling, and safety precautions are necessary for its usage.