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Desmodur® DN
Covestro (formerly Bayer MaterialScience) 科思创
Desmodur® DN is an aliphatic polyisocyanate of low volatility. Desmodur® DN is a solvent-free liquid polyisocyanate that is emulsifiable in water. Any occasional turbidity or precipitation visible is caused by very small amounts of processing aids These have no adverse effect on the processing and final properties of the cured adhesives. It can be used as the crosslinker for largely pH-neutral aqueous polymer dispersions including polyurethane, polyvinyl acetate, polyacrylate and synthetic rubber dispersions. Crosslinking increases the resistance of the bonds to heat, water, plasticisers and many solvents. Compared with Desmodur® DA, Desmodur® DN is characterised by its much lower viscosity and is not prone to turbidity at low storage temperatures. This product has an NCO content of 21.8 ± 0.5%, a viscosity at 23°C (rotation) of 1,250 ± 300 mPa·s, and an HDI monomer content of = 0.25%.
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