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Polyisocyanate crosslinking agents for solventborne adhesives
Bayer manufactures polyisocyanates under the name Desmodur®. Desmodur®
L and N are used as crosslinking agents in solventborne adhesives
for the packaging and film lamination industries.
Properties: Desmodur® L and N are largely colorless
and have a good adhesion-promoting effect on plastics. Adhesives based
on Desmocoll®
and Baycoll®
also give the Desmodur® improved heat resistance, hydrolysis resistance
and better resistance to grease, oils and solvents. Adhesives for
the packaging industry are produced through the combination of Desmodur®
with Desmocoll® 100 grades and Baycoll®-based polyurethanes
containing hydroxyl groups. Such adhesives adhere very well to oxidatively
pretreated polyethylene (for example by corona discharge).
Uses: Desmodur® L and N in combination with hydroxyl polyurethane
adhesives are used primarily for the production of adhesives for plastics.
Desmodur L 75 has proved particularly useful for the production of
adhesives for plastic film for food packaging. Adhesives based on
Desmodur® L in combination with Desmocoll® 100 grades are
used mainly for the production of heavy-duty sacks as are used, for
example, for packing fertilizers. Desmodur N grades are used primarily
for high-spec adhesives (stability to discoloration and low migration).
Advantages:
- Very good adhesion
- High strength and durability
- Resistance to grease, oils, solvents
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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