Covestro Desmodur N3600 Low viscosity HDI based trimer curing agent High solids and low viscosity formulations Chemical resistance
|
type |
Aliphatic polyisocyanate (low viscosity HDI trimer) |
|
form of supply |
Solvent free |
|
use |
Used as curing agent component in lightfast polyurethane coating system |
Product Specifications
|
characteristic |
Numerical value |
Units of measurement |
method |
|
NCO content |
23.0±0.5 |
% |
DIN EN ISO 11909 |
|
Viscosity@23°C |
1200±300 |
mPa·s |
DIN EN ISO 3219/A.3 |
|
Hazen color value |
≤40 |
|
DIN EN 1557 |
|
Monomer HDI content |
≤0.25 |
% |
DIN EN ISO 10 283 |
Other data*
|
characteristic |
Numerical value |
Units of measurement |
method |
|
Viscosity, 25°C |
about 1100 |
mPa·s |
DIN EN ISO 3219/A.3 |
|
equivalent |
about 183 |
|
|
|
Flash point |
about 158 |
°C |
DIN 53 213/1 |
|
Density@20°C |
about 1.16 |
g/ml |
DIN EN ISO 2811 |
*The above values are general information and are not part of the product specification.
Solubility / dilution
Desmodur® N 3600 can be used with esters, ketones and aromatic hydrocarbon solvents such as: ethyl acetate, butyl acetate, methoxypropyl acetate, acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, toluene , xylene, 100# naphtha solvent and its mixture for dilution. Generally have good miscibility with the above solvents. However, the storage stability of the resulting solutions must be tested. Polyurethane grade solvents should be used (less than 0.05 % water content, without reactive groups such as hydroxyl or amino groups). Aliphatic hydrocarbons should not be used as solvents.
The solids content of Desmodur® N 3600 should not be less than 40% after dilution. Solutions with low binder content can experience turbidity and precipitation after prolonged storage.
compatibility
Desmodur® N 3600 can generally be mixed with the following products. Namely: Desmodur® N 100, N 75, N 3200, N 3300, N 3400, N 3600 and Desmodur® Z 4470 type aliphatic polyisocyanates; Desmodur® L, HL and IL type aromatic polyisocyanates; Desmophen® 670 type polyisocyanates Ester polyol; Desmophen ® Type A polyacrylate. However, the miscibility of the prepared solution must be tested.
Desmodur® N 3600 is immiscible with branched polyester polyols such as Desmophen® 651 or polyether polyols such as Desmophen® 1380 BT.
Features/Applications
Desmodur® N 3600 is mainly used as a curing agent for lightfast two-component polyurethane coatings, producing coatings with strong chemical and weather resistance, excellent gloss retention and outstanding mechanical properties. The best co-reactants are polyacrylate or polyester polyols.
The main areas of application for self-drying and force-drying coating systems based on Desmodur® N 3600 are automotive OEM paints, automotive refinish paints, other vehicle paints, industrial paints and plastic paints.
Because of its low viscosity, it is especially suitable for the preparation of high solids coatings and can also be used as a curing agent for waterborne polyurethane coatings.
store .
Desmodur® N 3600 is sensitive to moisture and should therefore be stored in its original sealed container. When properly stored at room temperature, this product has a shelf life of at least 6 months.
Safety: Hazard Identification
Skin contact may cause allergic reactions. Contains isocyanates.
Product Safety Data Sheets should be strictly followed. It includes information on labelling, transport and storage, as well as information on product use, product safety and ecology.
