myTechnical Documents
Combination of aliphatic polyisocyanate and biuret of hexamethylene diisocyanate. It acts as a cross linker.
Details
Recommended for
Producer
Chemical Composition
Combination of aliphatic polyisocyanate and biuret of hexamethylene diisocyanate
Advantages
- compatibility with 2K-PUR, polyesters, acrylates, flexible medium-oil or short-oil alkyd resins and other OH-group containing resins
- dilution in aromatics and esters
- light stability and outstanding weathering resistant in polyurethane paints
- blends of Vestanat® HB 2640 with Vestanat® T 1890 in 2K-PUR paints improve drying performance, surface hardness, pot life and chemical resistance against enviromental impact
Other Applications
Adhesives
Sealants
maintenance-, wood-, industrial- and plastic coatings
Storage
Vestanat® HB 2640/LV is moisture sensitive.It can be stored in unopened containers for at least 6 months at room temperature without loss of quality
Handling
The basic reactivity of Vestanat® HB 2640/LV is lower compared to aromatic- and higher compared to cycloaliphatic polyisocyanate. If necessary zinc octoate, tin- or bismuth-catalysts are recommended as a urethane catalyst.
Technical data
| Quantity | Value | Unit | Comment |
|---|---|---|---|
| Appearance Properties | |||
| Color | <80 | َApha | ISO 6271 |
| Physical Properties | |||
| Residual monomers | <7000 | PPM | HDI;ISO10283 |
| Density | 1.13 | g/ml | ISO 2811; 23°C |
| Viscosity | 2150 ± 850 | cP | ISO 3219;at 23°C |
| Thermal Properties | |||
| flash point | 170 | ºC | ISO 1523; Closed up |
| Chemical Properties | |||
| Shelf Life | >6 | month | |
| NCO Content | 23.0 ± 0.5 | % | ISO 11909 |
| Non-volatile materials | % wt | ||
| Factor number | 3 - 4 | ||
| Solubility | |||
| Solubility | Aromatics | ||
| Solubility | |||