An anionic, aliphatic, aqueous polyurethane dispersion with a low activation temperature.
Suggested Uses: L-2245 is an adhesive grade polyurethane suggested for industrial laminating applications where a pre-lamination coating is applied to a substrate and then dried. Ideal for bonding plasticized vinyl sheet to itself and to other substrates such as rubber, wood, cardboard and textiles.
- May be crosslinked for improved adhesion and heat-resistance.
- Non-crystalline nature
- Low level of n-methyl pyrrolidone (NMP) co-solvent (~2 %)
|Solids Tolerance ||± 1 %
|Viscosity ||50 to 500 cps (Brookfield RVT, sp. 3, 100 rpm)
|pH||7.0 to 9.5
|Density ||8.75 lb/gal
|Softening Point ||220 ºF
|Volatile Organic Compounds (VOC) Content (As Supplied) ||0.25 lb/gal
|Elongation ||600 %
|Tensile Strength ||3300 psi
|100 % Modulus ||710 psi
|200 % Modulus ||910 psi
|300 % Modulus ||1270 psi
|L-2245 can be used as supplied or blended with vinyl acetate/ethylene, styrene butadiene and acrylic emulsions. The rheology of L-2245 may be modified with associative or acrylic thickeners for knife-over-roll or similar methods.|
Drying / Curing
|L-2245 will dry to a tack-free film in 10 minutes at 200 ºF. Heat activation will occur between 215 – 225 ºF. L-2245 may be crosslinked with polyaziridines, water dispersible polyisocyanates, epoxy silanes or low temperature melamines to increase bond strength and heat resistance.|