Hauthane L-2969
A soft, aliphatic, polyester-based, aqueous polyurethane dispersion.
Suggested Uses: L-2969 was designed primarily for use on flexible substrates as a coating, saturant or impregnant. L-2969 may also be used as a blending resin with harder polyurethane dispersions to impart flexibility without adversely effecting chemical resistance.
Characteristics:
- Outstanding toughness and abrasion resistance
- Excellent water and chemical resistance
- Exceptionally high melting point for a medium soft polymer
- Can be crosslinked to enhance performance
- Dilution and clean-up with water
- Contains dipropylene glycol dimethyl ether co-solvent
Physical Properties
Solids | 35 % |
Solids Tolerance | ± 1 % |
Viscosity | 75 to 200 cps |
pH | 8.5 to 10.0 |
Density | 8.7 lb/gal |
Softening Point | 325 ºF |
Volatile Organic Compounds (VOC) Content (As Supplied) | 107 g/L |
Sward Hardness | 10 |
Tensile Properties
Elongation | 500 % |
Tensile Strength | >5000 psi |
100 % Modulus | 700 psi |
200 % Modulus | 1100 psi |
300 % Modulus | 2000 psi |
Note | Tested at 20 inches/minute |
Application
L-2969 can be used as a sole vehicle or blended with harder polyurethane dispersions or acrylic emulsions for spray or rotogravure applications. Rheology modifications can be made with associative thickeners for alternative application methods.
Curing
The addition of coalescing solvent is recommended to achieve optimal film formation with L-2969. In ambient-cured systems the addition of 5 – 10 % DPnB coalescing solvent is suggested. Less coalescing solvent is required in heat-cured systems to attain comparable film properties. Typical drying temperatures and dwell times for aqueous coatings are sufficient to produce optimal film properties. L-2969 may be crosslinked with carbodiimides, water-dispersible isocyanates or polyaziridines to further enhance performance. |