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Isocyanate crosslinking agents for waterborne
adhesives
Under the name Desmodur®
D, Bayer offers solvent-free polyisocyanates for the crosslinking
of waterborne adhesive dispersions.
 Properties:
The low reactivity of these crosslinking agents, which are based
on aliphatic isocyanates, means that they can be used in aqueous
polymer dispersions with a virtually neutral pH, including polyurethane,
polyvinyl acetate, polyacrylate and synthetic rubber dispersions.
Their effectiveness is retained for several hours. The heat resistance
of bonds based on Dispercoll®
U is significantly improved by crosslinking with Desmodur®
D.
Uses: The Desmodur® D grades are used above all to exploit
to the full the potential properties of heat-activatable adhesives
based on Dispercoll® U. Such adhesives have proved successful
in the furniture industry for decorative film for kitchen cabinet
fronts.
Advantages: The Desmodur® D
grades
- significantly raise the softening point of the adhesive film
- improve solvent resistance and resistance to the migration of
plasticizers, grease and oil
- increase the resistance to chemical degradation / hydrolysis
- significantly improve the water resistance of bonds produced
with wood glues based on certain polyvinyl acetate dispersions
- are based on aliphatic isocyanates and therefore do not impair
the resistance of the adhesive to discoloration when exposed to
light
Contact us and our technical
experts will be pleased to give detailed advice on specific applications
of Bayer products in the furniture industry.
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