Covestro Desmodur N3600 Low viscosity HDI-based trimer curing agent High solid and low viscosity formula Chemical resistance

Type	fat Polyisocyanate(low viscosity HDI trimer)
Form of Supply	None Solvent
Purpose	in As curing agent component in light-resistant polyurethane coating system

Product Specifications

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Features	Value	Measurement unit	Method
NCOcontent	23.0±0.5	%	DIN EN ISO 11909
Viscosity@23°C	1200±300	mPa·s	DIN EN ISO 3219/A.3
°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 etc. for dilution. Generally, it has good miscibility with the above solvents. However, the storage stability of the prepared solution must be tested. Solvents of polyurethane grade (less than 0.05 % water, free of reactive groups such as hydroxyl or amino groups) should be used. Aliphatic hydrocarbons are not suitable as solvents.
After dilution of Desmodur® N 3600, the solid content should not be lower than 40%. Solutions with low binder content will appear turbid and precipitate after long-term 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 polyols; Desmophen ® Type A polyacrylates. 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. The prepared coatings have strong chemical and weather resistance, excellent gloss retention and excellent mechanical properties. The most preferred co-reactants are polyacrylate or polyester polyols.
The main fields of application for self-drying and force-drying coating systems based on Desmodur® N 3600 are automotive OEM paints, automotive refinish paints, other transport paints, industrial paints and plastic paints.
Due to its low viscosity, it is especially suitable for the preparation of high-solid coatings, and can also be used as a curing agent for waterborne polyurethane coatings.

Save
Desmodur® N 3600 is sensitive to moisture and should therefore be stored in the sealed original container. When stored under proper conditions at room temperature, this product has a shelf life of at least 6 months.

Safety: Hazard Identification
May cause an allergic reaction by skin contact. Contains isocyanates.
Product Safety Data Sheets should be strictly followed. It includes relevant information such as labels, transportation and storage, as well as relevant information on product use, product safety and ecology.

ester.
Product Safety Data Sheets should be strictly followed. It includes relevant information such as labels, transportation and storage, as well as relevant information on product use, product safety and ecology.