Covestro Desmodur E21 MDI prepolymer for moisture-curing one-component coatings and adhesives

Product Specifications

*The above values ​​are general information and do not belong to the product specification.

Solubility/Dilution
Generally, Desmodur® E 21 is compatible with ethyl acetate, butyl acetate, propylene glycol methyl ether acetate, xylene, Shellsol®A and Solvesso® 100.
However, the storage stability of its diluted solution still needs to be tested. Long-term storage of solutions with low solid content may cause turbidity and precipitation. Polyurethane grade solvents should be used (less than 0.05% water) and should not contain reactive groups in the solvent.

Compatibility
In general, Desmodur® E 21 is compatible with Desmophen®/Baycoll® polyols as well as other Desmodur® products and tougheners.

Features/Applications
Desmodur® E 21 is suitable for the preparation of moisture-curing one-component coatings. It can be used as a primer and sealer for porous substrates after dilution with suitable diluents to protect the substrates from moisture, oil, fuel and other chemical substances. .
  This product can also be used as a resin for the preparation of synthetic resin mortar. When mixed with suitable Desmophen® polyols, this product produces tough and abrasion resistant coatings and sealers. Desmodur® E 21 is also suitable for the preparation of solvent-free moisture-curing one-component adhesives or in combination with Baycoll® for two-component adhesives. These two adhesives can be used to bond a variety of materials such as wood, metal and plastic.

Save
  This product is sensitive to moisture and should be stored in the original airtight container. High temperature storage will result in increased viscosity and decreased NCO content.
When stored under proper conditions, this product has a shelf life of at least 6 months.

Safety: Hazard Identification
Harmful if inhaled, irritating to eyes, respiratory system and skin. Inhalation and skin contact may cause allergic reactions.
The product safety data sheet (MSDS) should be strictly followed. The safety data sheet includes labelling, transportation and storage related information, as well as relevant information on product use, product safety and ecology.