Covestro Desmodur ultra N3690 BA/SN slow drying curing agent ultra-low free monomer strong adhesion

Specifications

*This data is general information and is not part of the product manual.

Solubility/Dilution
Desmodur® ULTRA N3690 can be used in esters, ketones, and aromatic solvents such as: ethyl acetate, butyl acetate, methoxypropyl acetate, acetone, methyl ethyl ketone, methyl iso Butanone, cyclohexanone, toluene, xylene, 100# solvent naphtha and their mixtures are diluted. Miscibility with the above solvents is generally good. However, the storage stability of the prepared solution must be tested. Polyurethane grade solvents should be used (less than 0.05% water, no hydroxyl or amino reactive groups). Aliphatic hydrocarbons are not suitable as solvents. Desmodur® ULTRA N3690 should not be diluted below 40% solids. For solutions with low base material content, turbidity and precipitation will occur after long-term storage.

Compatibility
Desmodur® ULTRA N3690 is generally miscible with the following products. Namely: Desmodur® N100, N75, N3200, N3400, N3300 and Desmodur® Z4470 series aliphatic polyisocyanates; Desmodur® L, HL and IL series aromatic polyisocyanates; Desmophen® 670 series polyester polyols and polyacrylates. However, the compatibility of the prepared solutions must be tested. Desmodur® ULTRA N3690 is not compatible with branched polyester polyols such as Desmophen® 651 or polyether polyols such as Desmophen® 1380BT.

Features/Applications
Desmodur® ULTRA N3690 is mainly used as a curing agent component of lightfast two-component polyurethane coatings, which have excellent chemical resistance and weather resistance, outstanding gloss retention and excellent mechanical properties. Ideal co-reactants are polyacrylate or polyester polyols. Coating systems formulated with Desmodur® ULTRA N3690 are suitable for self-drying or baking and are used for the finishing of automotive original equipment (OEM), car refinishing, transportation vehicles, industrial products and plastics.

Save
- Store in original Covestro airtight container.
- Recommended storage temperature: 0-30°C.
- Protect from moisture, heat and foreign substances.
General information: This product is sensitive to moisture, storage at high temperature will cause the product to darken in color and increase in viscosity.

Storage Time
When the product is stored in full compliance with the requirements of the above "storage" clause and handled properly, the product complies with the above within 9 months from the date of shipment stated on the transport document Specifications or characteristic values ​​stated in the clause "Specification or characteristic values", as applicable. If the product exceeds the above-mentioned 9-month period, it does not mean that it no longer meets the set values ​​in the specifications or characteristic values. However, it is recommended that products older than 9 months from the date of shipment be tested before use to confirm that they still comply with the values ​​set forth in the specification or characteristic values. The manufacturer does not make any promises for products that have been shipped for more than 9 months from the date of shipment, and does not accept any responsibility and liability for non-conformity to specifications or set values ​​​​in the characteristic values.

Storage Time
When the product is stored in full compliance with the requirements of the above "storage" clause and handled properly, the product complies with the above within 9 months from the date of shipment stated on the transport document Specifications or characteristic values ​​stated in the clause "Specification or characteristic values", as applicable. If the product exceeds the above-mentioned 9-month period, it does not mean that it no longer meets the set values ​​in the specifications or characteristic values. However, it is recommended that products older than 9 months from the date of shipment be tested before use to confirm that they still comply with the values ​​set forth in the specification or characteristic values. The manufacturer does not make any promises for products that have been shipped for more than 9 months from the date of shipment, and does not accept any responsibility and liability for non-conformity to specifications or set values ​​​​in the characteristic values.