CYMEL® 1158 Resin

CYMEL® 1158 is an n-butylated, high imino melamine crosslinker used in coating formulations. Here are the key details about it:

Product Description:

• CYMEL® 1158 resin is a high imino melamine crosslinker with n-butylated characteristics. It combines the excellent compatibility of a conventional butylated melamine resin with the fast, low-temperature cure response of CYMEL® 325 resin.

Benefits:

• Fast cure response
• Substrate wetting
• Low formaldehyde release upon cure
• Humidity and salt spray resistance

Application Areas:

• Automotive coating formulations
• General industrial coatings

Physical Properties:

• Appearance: Clear Liquid
• Non-volatile by wt.: 78-82%
• Viscosity, 23°C: 4000 – 7000 mPa·s
• Free formaldehyde: < 0.5%
• Color, APHA: ≤ 70

Solubility:

• Alcohols: Complete
• Esters: Complete
• Ketones: Complete
• Aromatic hydrocarbons: Complete
• Aliphatic hydrocarbons: Partial
• Water: Insoluble

Compatibility:

• Acrylic resins: Very good
• Alkyd resins: Very good
• Polyester resins: Very good
• Epoxy resins: Very good

Backbone Polymer Selection:

• CYMEL® 1158 resin is effective for backbone polymer resins containing hydroxyl, carboxyl, and amide functional groups, such as alkyd, polyester, or acrylic resins.

Catalysis:

• CYMEL® 1158 resin may not require additional acid catalysts in the formulation due to the acidity of the backbone polymer. However, if needed, CYCAT® 296-9 catalyst can be added at 0.5 - 1.0% based on total resin solids.

Formulation Stability:

• Stability of solvent-borne systems containing CYMEL® 1158 resin can be enhanced by adding primary alcohols, amines, or a combination of these.

Storage Stability:

• Shelf life: 720 days from the date of manufacture when stored below 32°C. Excessive local heat should be avoided to prevent irreversible viscosity increase.

Overall, CYMEL® 1158 resin offers fast curing, substrate wetting, and resistance to environmental factors like humidity and salt spray, making it suitable for various coating applications in automotive and general industrial sectors.