Desmodur N3300 Isocyanate Hardener,
Automotive Coatings Isocyanate Hardener,
Automotive Coatings Desmodur N3300
DESMODUR N3300 Isocyanate HT 100 For Hardener Component
Aliphatic polyisocyanate (HDI trimer).
As the hardener component for lightfast polyurethane coating systems.
2. Solubility / thinnability
Desmodur® N 3300 can be thinned with esters, ketones, and aromatic
hydrocarbons such as ethyl acetate, butyl acetate, methoxy propyl acetate, acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, toluene, xylene, solvent naphtha® 100 and mixtures thereof.
It has good compatibility with the solvents listed. However, the solutions formed must be tested for their storage stability. Only PU-grade solvents should be used (max. 0.05 % water, absence of reactive hydroxyl or amino groups). Aliphatic hydrocarbons are unsuitable as solvents.
Prolonged solution storage with a lower binder content may result in turbidity and sedimentation.Desmodur® N 3300 should not be thinned below a solids content of 40 %.
|Property||Value||Unit of measurement||Method|
|NCO content||21.8 ± 0.3||%||DIN EN ISO 11 909|
|Viscosity at 23 °C||3,000 ± 750||mPa·s||DIN EN ISO 3219/A.3|
|Color value (Hazen)||≤ 40||DIN EN 1557|
|Monomeric HDI||< 0.15||%||DIN EN ISO 10 283|
|Viscosity at 25 °C||approx. 2,500||mPa·s||DIN EN ISO 3219/A.3|
|Equivalent weight||approx. 193|
|Flash point||approx. 228||°C||DIN 22 719|
|Density at 20 °C||approx. 1.16||g/ml||DIN EN ISO 2811|
Desmodur® N 3300 can be mixed with the following products: aliphatic polyisocyanates such as Desmodur® N 100, N 75, N 3200, N 3400, N 3600, and Desmodur® Z 4470; aromatic polyisocyanates such as Desmodur® L, HL, and IL; polyester polyols such as Desmophen® 670;
polyacrylates such as the Desmophen® A products. However, the compatibility of the combinations used should constantly be tested.
It is incompatible with branched polyester polyols such as Desmophen® 651 or polyether polyols such as Desmophen® 1380 BT.
5. Properties / Applications
Desmodur® N 3300 is primarily used as the hardener component for lightfast two-component polyurethane coatings with high chemical and weather resistance, good gloss retention, and outstanding mechanical properties. Preferred co-reactants are polyacrylate or polyester polyols.
Air- and force-drying coatings for automotive OEM, automotive refinishing, transportation, industrial finishing, and plastics. The main applications for systems based on Desmodur® N 3300 are automotive refinishing, transportation, industrial finishing, and plastics.
General information: The product is sensitive to moisture and should therefore be stored in tightly sealed containers. Storage at elevated temperatures will lead to an increase in viscosity and a reduction of the NCO content.
7. Storage time
For nine months following the day of shipment, as stated in the respective transport documents, the product will meet the specifications or values outlined in section "specifications or characteristic data" above, whatever is applicable, provided that the product is stored in full compliance with the storage conditions outlined in and referenced under section "storage" above and is otherwise handled appropriately.
The lapse of nine months does not necessarily mean that the product no longer meets specifications or the set values. Covestro does not make any representation regarding the product after the lapse of the nine months, and Covestro shall not be responsible or liable in any way for the development failing to meet specifications or the set values after the lapse of the nine months. However, before using said product, Covestro recommends testing such a product to see if it still meets the specifications or the set values.
Contact Person: Annie Qing
Tel: +86 18307556691