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Polyurethanes for solventborne adhesives
 High-molecular-weight
polyurethanes terminated with hydroxyl groups are marketed under
the name Desmocoll®. Desmocoll® hydroxyl polyurethanes are
polyaddition products based on bifunctional polyesters and diisocyanates.
Properties: The Desmocoll® grades differ with
respect to their crystallization rate, solution viscosity and thermoplasticity.
The Desmocoll® grades in the 100 range are particularly suitable
for the packaging segment because they have lower crystallinity and
good adhesion to less polar surfaces. The Desmocoll® grades based
on aromatic isocyanates have a tendency to yellowing under the influence
of light.
Uses:
In the packaging industry, Desmocoll®-based adhesives are used
for the production of laminated film and crossbottom valve sacks.
Advantages:
- Excellent solubility in many organic solvents, e.g. ethyl acetate
Contact us and our technical
experts will be pleased to give detailed advice on specific applications
of Bayer products in the packaging industry.
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