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. |
