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Type	Fat Family polyisocyanate(HDI trimer)
Supply form	Approx. 90% butyl acetate/No. 100 solvent naphtha (1:1) solution
Purpose	at Used as a curing agent component in light-resistant polyurethane coatings

Specifications

Features	Value	Measurement units	Method
NCOContent	20.7±0.5	%	M105-ISO11909
Non-volatile content (2.2g/120min/100°C）	mPa·s	M014-ISO3219/A.3
Equivalent	approx. 203
Flashpoint	Approx. 58	°C	DIN53213
Density@20°C	approx. 1.13	g/ml	DINENISO2811

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

Solubility/Dilution
Desmodur® ULTRA N3690 can be used with esters, ketones, and aromatic hydrocarbon solvents such as: ethyl acetate, butyl acetate, methoxypropyl acetate, acetone, methyl ethyl ketone, methyl isopropyl acetate, etc. Dilute with butanone, cyclohexanone, toluene, xylene, 100# solvent naphtha and their mixtures. The miscibility with the above solvents is generally very good. However, the resulting solution must be tested for storage stability. Polyurethane grade solvents should be used (less than 0.05% water content, no hydroxyl or amino reactive groups). Aliphatic hydrocarbons are not suitable as solvents. Desmodur® ULTRA N3690 should not be diluted below 40% solids. Solutions with low base material content will appear turbid and precipitated during long-term storage.

Compatibility
Desmodur® ULTRA N3690 is generally miscible with the following products. Namely: Desmodur® N100, N75, N3200, N3400, N3300 and Desmodur® Z4470 aliphatic polyisocyanates; Desmodur® L, HL and IL aromatic polyisocyanates; Desmophen® 670 polyester polyols and polyacrylates. However, the compatibility of the prepared solution 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 the curing agent component of light-resistant two-component polyurethane coatings. The coating has excellent chemical resistance, weather resistance, and outstanding gloss retention. and excellent mechanical properties. The ideal coreactants are polyacrylates or polyester polyols. Coating systems formulated with Desmodur® ULTRA N3690 are suitable for auto-drying or baking and are used for finishing automotive original equipment (OEM), automotive refinishing, transportation vehicles, industrial products and plastics.

Save
– Store in original Covestro sealed containers.
– Recommended storage temperature: 0-30℃.
– Avoid moisture, heat and foreign matter.
General information: This product is sensitive to moisture. Storage in high temperature environments will cause the product to darken in color and increase in viscosity.

Storage Time
Provided that the product is stored in full compliance with the requirements of the “Storage” clause above and properly handled, the product shall comply with the above requirements within 9 months of the date of shipment stated on the shipping document. Specifications or property values ​​stated in the “Specifications or Property Values” clause (as applicable). If a product exceeds the above nine-month period, it does not mean that it no longer meets the specifications or the values ​​set in the characteristic values. However, it is recommended that products more than 9 months from the date of shipment be tested before use to confirm whether they still meet the values ​​set in the specifications or characteristic values. The manufacturer does not make any commitments for products that are more than 9 months from the date of shipment, nor does it assume any responsibility or liability for products that do not meet the specifications or the set values ​​in the characteristic values.

e=”background-color:#f1c40f”> Save
– Store in original Covestro sealed containers.
– Recommended storage temperature: 0-30℃.
– Avoid moisture, heat and foreign matter.
General information: This product is sensitive to moisture. Storage in high temperature environments will cause the product to darken in color and increase in viscosity.

Storage Time
Provided that the product is stored in full compliance with the requirements of the “Storage” clause above and properly handled, the product shall comply with the above requirements within 9 months of the date of shipment stated on the shipping document. Specifications or property values ​​stated in the “Specifications or Property Values” clause (as applicable). If a product exceeds the above nine-month period, it does not mean that it no longer meets the specifications or the values ​​set in the characteristic values. However, it is recommended that products more than 9 months from the date of shipment be tested before use to confirm whether they still meet the values ​​set in the specifications or characteristic values. The manufacturer does not make any commitments for products that are more than 9 months from the date of shipment, nor does it assume any responsibility or liability for products that do not meet the specifications or the set values ​​in the characteristic values.