科思创固化剂Desmodur N 3900
Desmodur N 3900
Desmodur N 3900
Characterization Low-viscosity, aliphatic polyisocyanate resin based on
hexamethylene diisocyanate.
As the hardener for weather-stable coating systems.
Form supplied 100 %
Specification
Property Value Unit of measurement Method
NCO content 23.5 ± 0.5 % by wt. DIN EN ISO 11 909
Viscosity at 23 °C 730 ± 100 mPa·s DIN EN ISO 3219/A.3
Hazen color value ≤ 40 DIN EN 1557
Monomeric HDI < 0.3 % DIN EN ISO 10 283
Other data*
Property Value Unit of measurement Method
Equivalent weight approx. 179
Flash point approx. 203 °C DIN EN 22 719
Density approx. 1.15 g/cm3 DIN EN ISO 2811
*These values provide general information and are not part of the product
specification.
Desmodur N 3900
Solubility/thinnability Desmodur® N 3900 is compatible with the following solvents
ethyl acetate, butyl acetate, 1-methoxypropylacetate-2,
acetone, methyl ethyl ketone, methyl isobutyl ketone,
cyclohexanone, toluene, xylene,solvent naphtha® 100 and
mixtures thereof.
Aliphatic hydrocarbons are not suitable as solvents.
Desmodur® N 3900 should not be thinned to below a solids
content of 40 % by wt. Prolonged storage of a solution
with a lower solids content may
result in turbidity and sedimentation.
Compatibility Desmodur® N 3900 can be mixed with the following Desmodur
and Desmophen® products:Desmodur® N 75, N 100, N 3200,
N 3300, N 3390, N 3400, N 3600 and Z 4470;
most polyester-based Desmophen® products such as Desmophen
670,680, VP LS 2971, VP LS 2089 and VP LS 2107; Desmophen
A products (acrylates).
It is incompatible with Desmophen® 650 and 651.
Properties/Applications Desmodur® N 3900 is used to formulate high-solids
systems for automotiverefinishing, transportation
coating and plastics coating.
Storage - Storage in original sealed Bayer
MaterialScience container.
- Recommended storage temperature: 0 - 30 °C.
- Protect from moisture, heat and foreign material.
General information: The product is sensitive to
moisture. 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.
Storage time Bayer MaterialScience represents that, for a period of six
months following the day of shipment as stated in the
respective transport documents, the product
will meet the specifications or values set forth in
section "specifications or characteristic data" above,
what ever is applicable, provided that the product is
stored in full compliance with the storage conditions
set forth in and referenced under section "storage"
above and is otherwise handled appropriately.
The lapse of the six months period does not necessarily
mean that the product no longer meets specifications or
the set values. However, prior to using said product,
Bayer MaterialScience recommends to test such a product
if it still meets the specifications or the set values.
Bayer MaterialScience does not make any representation
regarding the product after the lapse of the six months
period and Bayer MaterialScience shall not be responsible
or liable in any way for the product failing to meet
specifications or the set values after the lapse of the
six months perio
