Name: Urea-Formaldehyde Resin Wood Adhesive UF-68
Brand: Coatingsink
SKU: urea-formaldehyde-wood-adhesive
Availability: InStock

Question 1

What catalyst loading and pot life can be expected with UF-68?

Accepted Answer

Ammonium chloride (NH4Cl) at 0.3–0.8 phr on resin solids is the standard hardener. At 20–25°C this gives a working pot life of 6–8 hours. Higher catalyst loadings or elevated temperatures shorten pot life and accelerate glue-line cure; adjust to match your press scheduling.

Question 2

How does UF-68 achieve E1 formaldehyde emission classification?

Accepted Answer

UF-68 is synthesised at a low F:U molar ratio of 1.10 with a post-condensation scavenging step that reduces free formaldehyde below 0.30%. Cured panels comply with EN 13986 E1 (<0.124 mg/m³ air) and may reach E0 classification (<0.062 mg/m³) with appropriate press conditions and panel construction.

Question 3

Is UF-68 suitable for continuous press MDF production lines?

Accepted Answer

Yes. Its moderate viscosity (200–600 mPa·s) ensures consistent fibre wetting in blow-line or drum blender application. At press temperatures of 180–210°C, gel times of 15–25 seconds deliver the fast cure rates required for continuous belt or multi-opening press operations.

pH (25°C)	7.5–9.0
Solids Content	68 ± 1%
Free Formaldehyde	<0.30% (E1)
Molar Ratio (F:U)	1.10
Viscosity (25°C)	200–600 mPa·s

Urea-Formaldehyde Resin Wood Adhesive UF-68

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