Home > Applications > Corrosion Protection

A Selection of moisture curing 1K polyurethane raw materials for corrosion protection

Prepolymers represent an intermediate level between traditional polyurethane coating raw materials like MDI and the finished coatings produced with these raw materials. Our prepolymers contain free isocyanate groups that react with ambient moisture.

Prepolymers in the Desmodur® E range

are the reaction products of aromatic or aliphatic isocyanates/diisocyanates and polyols
react to long chain, highly-resistant polymers resulting in solid products with specific adjustable final properties, such as strength or chemical resistance
can be formulated to be either highly elastic or tough, depending on their chemical structure

For 1K und 2K polyurethane coatings

	Type	Solids in %	% NCO or OH on solids	Viscosity mPas at 23°C	Characteristics
Desmodur® E 1361 MPA/X	TDI Polyisocyanate prepolymer	61	11.1 NCO	500	Resistant against moisture, oils, fuels and aggressive chemicals
Desmodur® E 14	TDI Aromatic polyisocyanate prepolymer	100	3.3 NCO	6800	For highly elastic coatings and sealants
Desmodur® E 21	MDI polyisocyanate prepolymer	100	16.0 NCO	5400	Tough elastic, wear resistant
Desmodur® E 23	MDI polyisocyanate prepolymer	100	15.4 NCO	1800	As primer and sealant of porous substrates and as protection against moisture, oils, fuels and other chemicals
Desmodur® MT	MDI Polyisocyanate prepolymer	100	16.8	900	Stabilizer for pigmented moisture curing aromatic one component polyurethane coatings

Some select starting formulations for corrosion protection:

RR 5290	One-component polyurethane primer for marine coatings (Desmodur® E 1361)

RR 5291	One-component polyurethane intermediate coat for marine coatings (Desmodur® E 1361)