Covestro Bayhydur 305 waterborne HDI polyisocyanate easy to mix high gloss
| Type | Hydrophilic aliphatic polyisocyanate based on hexamethylene diisocyanate |
| Form of Supply | None Solvent-based |
| Purpose | Curing agent for waterborne two-component polyurethane coating |
Product Specifications
| Features | Value | Measurement unit | Method |
| NCOcontent | 16.2 ±0.4 | % | DIN EN ISO 11 909 |
| Viscosity@ 23℃ | 6,500 ±1,500 | mPa ·s | DIN EN ISO 3219 |
| Hazencolor value span> | ≤ 150 | DIN EN 1557 | |
| isocyanate monomer content | < 0.15 | % (by weight) | DIN 55 956 |
Other Data*
| Features | Value | Measurement unit | Method |
| Density | about1.16 | g/cm3 | DIN 53 217 |
| Flashpoint | about230 | ℃ | DIN EN 53 213 |
Solubility/Dilution
Bayhydur 305 generally has good compatibility with organic solvents such as: esters, ether esters, xylene and solvent naphtha 100. However, in any case the solubility/miscibility of the prepared solution must be tested. Polyurethane grade solvents should be used (moisture content <0.05%)
Features/Applications
This product is a crosslinking agent for water-based paint. It is especially suitable for use in the civilian field where it can be mixed and used immediately after shaking or manual stirring.
Even in the pre-diluted condition, the coating film is still transparent and bright. The mixing ratio of mill base to curing agent is usually 10:1.
enter”>g/cm3
DIN 53 217
Flashpoint
about230
℃
DIN EN 53 213
Solubility/Dilution
Bayhydur 305 generally has good compatibility with organic solvents such as: esters, ether esters, xylene and solvent naphtha 100. However, in any case the solubility/miscibility of the prepared solution must be tested. Polyurethane grade solvents should be used (moisture content <0.05%)
Features/Applications
This product is a crosslinking agent for water-based paint. It is especially suitable for use in the civilian field where it can be mixed and used immediately after shaking or manual stirring.
Even in the pre-diluted condition, the coating film is still transparent and bright. The mixing ratio of mill base to curing agent is usually 10:1.