Hauthane L-2245
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.
Characteristics:
- May be crosslinked for improved adhesion and heat-resistance.
- Non-crystalline nature
- Low level of n-methyl pyrrolidone (NMP) co-solvent (~2 %)
Physical Properties
| Solids | 40 % |
| 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 |
Tensile Properties
| Elongation | 600 % |
| Tensile Strength | 3300 psi |
| 100 % Modulus | 710 psi |
| 200 % Modulus | 910 psi |
| 300 % Modulus | 1270 psi |
Application
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.
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.
