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 %)
Unit of Measure

Physical Properties

Solids

N/A 40 %

Solids Tolerance

N/A ± 1 %

Viscosity

N/A 50 to 500 cps (Brookfield RVT, sp. 3, 100 rpm)

pH

N/A 7.0 to 9.5

Density

N/A 8.75 lb/gal

Softening Point

N/A 220 ºF

Volatile Organic Compounds (VOC) Content (As Supplied)

N/A 0.25 lb/gal

Tensile Properties

Elongation

N/A 600 %

Tensile Strength

N/A 3300 psi

100 % Modulus

N/A 710 psi

200 % Modulus

N/A 910 psi

300 % Modulus

N/A 1270 psi

Application

N/A 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

N/A 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.