Desmodur® N 100 is an aliphatic polyisocyanate (HDI biuret) primarily used as the hardener component for lightfast two-pack polyurethane coatings. Here are some key details about Desmodur® N 100:
- Characterization: It is a solvent-free liquid.
- Specification:
- NCO Content: Approximately 22.0%.
- Viscosity (at 23°C): Around 10,000 ± 2,000 mPa·s.
- Color Value (Hazen): ≤ 80.
- Monomeric HDI: ≤ 0.5%.
- Solubility/Thinnability: Desmodur® N 100 can be thinned with esters, ketones, and aromatic hydrocarbons such as ethyl acetate, butyl acetate, methoxypropyl acetate, acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, toluene, xylene, solvent naphtha® 100, and mixtures thereof. Compatibility with solvents listed is generally good, but solutions formed must be tested for their storage stability. Thinning to less than 40% non-volatile content should be avoided.
- Compatibility: Can be mixed with aliphatic and aromatic polyisocyanates, polyester polyols, polyacrylates, and polyether polyols. Compatibility of combinations should always be tested.
- Properties/Applications: Used primarily as the hardener component for lightfast two-pack polyurethane coatings with high resistance to chemicals and weathering, excellent gloss retention, and outstanding mechanical properties. Preferred co-reactants are polyacrylate or polyester polyols. Applications include automotive and industrial finishing, wood, furniture, plastics, and corrosion protection.
- Storage: Recommended storage temperature is between 5 - 25 °C. Should be protected from moisture, heat, and foreign material. Storage at higher temperatures can result in increased color and viscosity, while storage at significantly lower temperatures can lead to solidification, which is reversible by brief heating without adversely affecting the product's quality.
As with similar products from Covestro, Desmodur® N 100 is not designated for medical grade, food contact, or cosmetic applications unless prior approval is obtained. Proper testing and handling procedures should be followed to ensure suitability and safety for specific applications.