Desmodur-HDI based curing agent

Covestro Desmodur N100 HDI polyisocyanate lightfast curing agent

type	Aliphatic Polyisocyanate (HDI Biuret)
form of supply	Solvent free
use	Used as a curing agent component in lightfast polyurethane coating systems

Specification

characteristic	Numerical value	Units of measurement	method
NCO content	22.0±0.3	%	DIN EN ISO 11909
Viscosity, 23°C	10,000±2,000	mPa·s	DIN EN ISO 3219/A.3
Color value (Hazen)	≤80		DIN EN 1557

Other data*

characteristic	Numerical value	Units of measurement	method
Viscosity, 25°C	about 8,000	mPa·s	DIN EN ISO 3219/A.3
equivalent	about 191
Density, 20°C	1.41	g/ml	DIN EN ISO 2811
Flash point	约181	°C	DIN 22719

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

Solubility/Dilution
Desmodur® N100 can be used with esters, ketones, aromatic hydrocarbon solvents such as: methoxypropyl acetate, acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, toluene, xylene, 100# solvent naphtha and its mixture to dilute. Generally speaking, it has good compatibility with the above-mentioned solvents. However, the storage stability of the resulting solutions must be tested. Polyurethane grade solvents should be used (less than 0.05% water content and free of reactive groups such as hydroxyl or amino groups). Aliphatic hydrocarbons are not suitable as solvents. Desmodur® N100 cannot be diluted below 40% solids. Solutions with low binder content may experience turbidity and precipitation after prolonged storage.

compatibility
Desmodur® N100 can generally be used with the following products. Namely: Desmodur® N3200, N3300, N3400, N3600 and Desmodur® Z4470 aliphatic polyisocyanates; Desmodur® L, HL and IL aromatic polyisocyanates; Desmophen® 651 and 670 polyester polyols Desmophen® A polyacrylic acid Esters; Desmophen® 1380BT based polyether polyol. However, the compatibility of the prepared solution must be tested. Properties/Applications Desmodur® N100 is primarily used as a curing agent for lightfast two-pack polyurethane coatings with high chemical and weather resistance, excellent gloss retention and mechanical properties. Preferred coreactants are polyacrylates and polyester polyols. Coating systems formulated with Desmodur® N100 are suitable for air-drying or baking for automotive and industrial finishes such as wood, furniture, plastics and corrosion protection. Storage Desmodur® N100 is moisture sensitive and should therefore be stored in an airtight container. This product has a shelf life of at least 6 months when stored in the original container at 5-25°C.

Safety: Hazard Identification
Harmful if inhaled, inhalation and skin contact may cause an allergic reaction.
The Safety Data Sheet (028669) must be strictly followed. It includes information on labelling, transportation and storage, as well as information on product use, product safety and ecology.