Cyante 325 belongs to a kind of methylated amino resin containing high imino group. CYMEL 325 resin is soluble in most common organic solvents, such as aromatic solvents, ethanol, esters and ketones. CYMEL 325 has limited solubility in water, but it can also be diluted by water when mixed with other water-based resins. The reaction of CYMEL 325 with other resins containing hydroxyl, carboxyl and amide groups must be catalyzed by strong acid. It is generally recommended to add 0.5%- 1.0% (based on solids) of CYCAT 4040 or CYCAT 600 catalyst and bake at 120- 150℃ for 15-20 minutes. If the formula contains pigments or additives, the amount of acid catalyst should be larger. CYMEL 325 is a very effective crosslinking agent because it has high functionality and low self-polymerization tendency. Especially when crosslinked with polyester resin, it can provide good flexibility and formability for paint film. Its effective equivalent is 130- 190, and the dosage of CYMEL 325 should be determined by experiments according to the best performance.
CYMEL325 technical parameters
Non-volatile% (aluminum foil method, 45 degrees 45 minutes): 80+2
Solvent: isobutanol
Alkyl alcohol: methanol
Viscosity, poise, about: 20-46
Specific gravity, g/ml: 1. 12.
Main reactive groups: alkoxy/imino.
Hydroxymethyl content: low
Free formaldehyde content,%, maximum: 0.75
Important characteristics: high reactivity, low temperature curing.