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Covestro Bayhydur 305 waterborne HDI polyisocyanate easy to mix high gloss

November 21, 2023by admin0
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.

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