 |
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 to exploit to the
full the potential properties of heat-activatable adhesives based
on Dispercoll® U. Such adhesives have proved successful in the
automotive industry for the production of fittings for interior trim.
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 resistance to chemical degradation / hydrolysis
- 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 transportation industry.
|
|
