Type Hydrophilic aliphatic polyisocyanate based on hexamethylene diisocyanate (HDI), used as the curing agent component of water-based two-component polyurethane systems
Supply form 100 %
Specifications
Features |
Value |
Unit |
Test method |
NCO Content |
20.3 - 21.3 |
% |
M105 -ISO 11909 |
Viscosity,23°C |
3,500 ± 1,000 |
mPa ·s |
M014 -ISO 3219/A.3 |
HazenColor value |
< 60 |
|
<span style="font-fami��Water-based systems need to have a combination of stability and chemical resistance. Although the curing agent is relatively weakly hydrophilic, it emulsifies easily in the aqueous phase, even at the low shear forces common in commercial applications. Coatings prepared using this product can form a high-gloss, low-haze film.
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General Information :Hydrophilic isocyanates are very sensitive to moisture and react with water to form carbon dioxide and water-insoluble urea. Therefore must be stored in airtight containers. All forms of water (humid air, solvents, moist containers) must be prevented because the production of carbon dioxide can cause a dangerous increase in pressure. Storage at high temperatures will cause a slight increase in viscosity and color.
Storage Time
This article is from the Internet, does not represent the position of Toluene diisocyanate reproduced please specify the source.https://www.chemicalchem.com/archives/14724
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