HDI closed Covesro BL 3370
ABOUT:
Blocked aliphatic HDI-polyisocyanate. To formulate lightfast one-component stoving polyurethane coatings with high themal yellowing resistance; as an additive to improve flexibility and adhesion.
Product Types:
-
HDI
-
PIC
-
Aliphatic polyisocyanate
-
Crosslinkers
-
Polyisocyanate
-
Hardeners
-
Polyisocyanurate
-
Isocyanate
Material:
Coatings, paints & inks
Solventborne, Flexible, Thermally resistant, Elastic
General Characterization:
Desmodur BL 3370 MPA is a blocked aliphatic polyisocyanate based on hexamethylene diisocyanate (HDI).
It is suitable for use in combination with Desmophen® grades to formulate lightfast, one-component stoving polyurethane coatings with high resistance to thermal yellowing; as an additive in conventional stoving coating systems to improve the reactivity, flexibility and adhesion.
Storage Conditions:
Desmodur BL 3370 MPA should be stored in tightly sealed original containers and protected from moisture, heat, and foreign materials. Storage at higher temperatures will result in increase of color and viscosity. Storage at significant lower temperatures will result in solidification. This solidification is reversible by briefly heating the product without adversely affecting the quality of the product. Recommended storage temperature is 0º-30ºC.
Characteristics:
Property Name |
Test Method |
Unit |
Value |
Density |
g/cm^3 |
approx. 1.08 |
|
Viscosity at 25^oC |
mPa?s |
approx. 3,200 |
|
Equivalent weight |
approx. 470 |
||
Flash point |
°C |
approx. 49 |
|
Blocked NCO content |
% |
approx. 8.9 |
Specifications:
Property Name |
Test Method |
Unit |
Value |
Non-volatile content (1 g / 60 min / 80^oC) |
% |
70 ± 3 |
|
Free NCO content |
% |
? 0.2 |
|
Viscosity at 23°C |
mPa?s |
3,800 ± 1,200 |
|
Hazen color value |
? 60 |
