YL-W6906A is a hydrophilic aliphatic polyisocyanate based on hexamethylene diisocyanate(HMDI) and isophorone diisocyanate; it is used as curing agent of waterborne two-component polyurethane coating system.
Properties
Appearance | Water white or yellowish transparent liquid |
Isocyanate content /% | 12.5±0.5 |
Non volatile matter /% | 65.0±2.0 |
HDI monomer content /% | ≤0.2 |
viscosity /( cp, 25℃) | 50~200 |
Other data
The following are typical features of YL-W6906 and should not be considered as product specifications.
Item | Typical data |
Average equivalent | About 336 |
relative density /(g/cm3, 25℃) | 1.03~1.05 |
flash point /℃ | About 40℃ |
Solubility
YL-W6906A can be diluted with esters, ether esters, xylene and solvent naphtha 100. Generally, it has good compatibility with the above solvents, but the stability of the prepared solution must be tested. Polyurethane grade solvents should be used (moisture content less than 0.05%, and the solvent should not contain active groups such as hydroxyl or amino groups).
Applications
Yl-W6906 is a cross-linking agent suitable for water-based systems. Because of its hydrophilicity and dilution with environmentally friendly solvents, YL-W6906A is easy to disperse and emulsify in aqueous phase, even under common shear force in commercial use. Yl-W6906A can be directly used in the two-component waterborne polyurethane system. The product has a long activation period, high foam film thickness, fast hardness establishment speed and excellent chemical or solvent resistance.Although after adding YL-W6906A the two-component coatings has a longer activation period, the activation period is affected by polymer content and other components (e.g. resins, thickeners, plasticizers, etc.). In many dispersions, the end point of activation (usually several hours) does not show gelation.
Packaging and storage
Package specification | 20L, 60L or 200L small mouth iron barrel, other packaging specifications can also be agreed |
Storage | Please keep it away from light, cool and dry place. The storage temperature should be 5~30 ℃ to keep the package intact and sealed well. The shelf life of this product is 6 months from the date of production. It is recommended to evaluate the performance before use after more than 6 months. |
Security
This product contains polyisocyanate, so you should be very careful when using it. Skin contact with this product may cause allergic reaction; all YL-W series products are very sensitive to moisture and react with water to form carbon dioxide and insoluble urea. Therefore, the packaging container must be well sealed to avoid reaction with moisture, solvent and moisture in the container. The carbon dioxide produced will increase the pressure of the container, thus increasing its risk.