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Solventborne and solventfree 2K polyurethane raw materials for heavy corrosion protection

For heavy and medium corrosion protection of the classes C3 to C5-M, polyurethane systems are most popular in particular for topcoats. They are lightfast, they withstand wind, weather and athmospheric pollutants. They dry quickly and can be overcoated in very short cycles. On top of that, they can be applied largely independent of the weather conditions and feature a good impact resistance.

2K solventborne polyurethane raw materials

	Type	Solids Content %	% NCO on solids	Viscosity mPas at 23°C	Characteristics
Desmodur N 75 MPA/X	HDI-Biuret	75	22.0	250	Lightfast, chemical and weather resistant, good mechanical resistance
Desmodur® N 3390 BA/SN	HDI trimer	90	21.8	500	High gloss, good chemical and weather resistance, lightfast, high mechanical resistance
Desmodur® N 3600	HDI trimer	100	23.0	1200	for high solid coatings, high gloss, good chemical and weather resistance, lightfast, high mechanical resistance
Desmodur® N 3900	HDI polyisocyanate	100	23.5	730	Hardener component for weather resistant coating systems

Suitable combination partners for Desmodur® N grades can be polyols like hydroxy acrylates.

2K solventfree polyurethane raw materials

	Type	Solids in %	% NCO or OH on solids	Viscosity mPas at 23°C	Characteristics
Desmophen® 1380 BT	Trifunctional polypropylene ether polyol	100	11.7 OH	600	For elastic coatings
Desmodur® VL	MDI polyisocyanate	100	31.5 NCO	90	For hard to elastic coatings
Desmodur® VL R 20	MDI polyisocyanate	100	31.5 NCO	200	For hard to elastic coatings