Covestro Desmodur® N75 MPA/X HDI Biuret Curing Agent Good chemical resistance and flexibility

Type

Fat Family polyisocyanate(Hexamethylene diisocyanate biuret)

Form of Supply

about 75% 1-Methoxypropyl acetate-2/Xylene(1:1)solution

Purpose

Use As a curing agent component in light-resistant polyurethane coatings

Features

Value

Measurement unit

Method

NCOcontent

16.5 ±0.3

%

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

Solubility/Dilution
Desmodur® N75 MPA/X can be used with esters, ketones, and aromatic solvents such as: ethyl acetate, butyl acetate, Methoxypropyl acetate, acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, toluene, xylene, No. 100 solvent naphtha and their mixtures for dilution. Generally have good miscibility with these solvents. However, the storage stability of the prepared solution must be tested. Polyurethane grade solvents should be used (less than 0.05% water, no reactive groups such as hydroxyl or amino groups). Aliphatic hydrocarbons are not suitable as solvents. Desmodur® N75 MPA/X should not be diluted below 40% solids. Solutions with low base content may become turbid and precipitate after long-term storage.

Compatibility
Desmodur® N75 MPA/X can generally be used with the following products. Namely: Desmodur® N3200, N3300, N3400, N3600 and Desmodur® Z4470 type aliphatic polyisocyanates; Desmodur® L, HL and IL type aromatic polyisocyanates; Desmophen® 651 and 670 type polyester polyols; Desmophen® A type polyisocyanates Acrylates; Desmophen® 1380BT-like polyether polyols. However, the compatibility of the prepared solutions must be tested.

Features/Applications
Desmodur® N75 MPA/X is mainly used as a curing agent component for lightfast two-component polyurethane coatings with good Chemical resistance, weather resistance, excellent gloss retention and excellent mechanical properties. Ideal co-reactants are polyacrylate or polyester polyols. Coating systems formulated with Desmodur® N75 MPA/X are suitable for self-drying and oven-drying applications for automotive coatings and industrial finishes such as wood, furniture, plastic finishing and corrosion protection.

Save
Desmodur® N75 is sensitive to moisture and should 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
Flammable. Harmful by inhalation or in contact with skin. May cause sensitization by skin contact. Contains isocyanates. Risk of inhalation of xylene and ethylbenzene through skin. The Safety Data Sheet must be strictly followed. It includes relevant information such as labeling, transportation and storage, as well as relevant information on product use, product safety and ecology.