CYMEL® 303 LF

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Description

CYMEL® 303 LF is a highly methylated, monomeric melamine crosslinker supplied in liquid form with a solids content of ≥ 98%. It is primarily used as a crosslinking agent for various coatings, offering several benefits and applications. Here are the key details:

Product Description: CYMEL® 303 LF resin is designed to be an effective crosslinking agent for a wide range of applications including can, container, automotive, and general industrial coatings. Despite being insoluble in water, it demonstrates excellent compatibility with water-soluble backbone polymers and maintains stability in amine-stabilized waterborne formulations.

Benefits:

Solvent-free
Excellent balance of hardness and flexibility
Fast catalyzed cure response
Excellent stability
Low free formaldehyde content

Application Areas:

Coil coatings
Can and container coatings
Automotive finishes
High solids and waterborne coatings
General industrial finishes
Inks

Physical/Certified Properties:

Non-volatile content by weight: ≥ 98%
Dynamic Viscosity at 23°C: 3000 – 6000 mPa·s
Free formaldehyde: < 0.1%
Color, APHA: ≤ 70
Standard Solvent Tolerance: ≥ 100

Solubility:

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

Compatibility: CYMEL® 303 LF resin exhibits very good compatibility with various resin types including acrylic, alkyd, polyester, and epoxy resins.

Backbone Polymer Selection: It contains mainly methoxymethyl functional sites, making it suitable for crosslinking with backbone polymer resins containing hydroxyl, carboxyl, or amide functional groups, such as alkyd, polyester, or acrylic resins.

Catalysis: Responds best to sulfonic acid catalysts, with recommended concentrations typically ranging from 0.5 to 1.0% on total resin solids.

Formulation Stability: Enhanced by the addition of primary alcohols, amines, or a combination of these. Adjusting pH to 7.5 - 8.5 for waterborne systems can also improve stability.

Storage Stability: Shelf life of 1800 days when stored below 32°C. Crystallization of hexamethoxymethylmelamine (HMMM) may cause haziness when cold, but warming restores normalcy.

Safety and Handling: Refer to the Safety Data Sheet (SDS) for safety, health, and environmental data.

Overall, CYMEL® 303 LF offers a versatile and effective solution for crosslinking various coatings, providing a balance of performance, stability, and environmental considerations.

Files

CYMEL-303-LF_EN_A4.pdf View

Application

Paints & Coatings

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CYMEL® 303 LF

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Description

Files

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Application

Add a review

Leave a Reply · Cancel reply

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