Multifunctional propyleneimines-new generation of crosslinkers for ...

ARTICLE IN PRESS
Z. Czech / International Journal of Adhesion & Adhesives 24 (2004) 503–511 511
the greatest influence of tack, adhesion and
cohesion in the case of aromatic propyleneimine
was observed.
* Fromthe reaction products between multifunctional
isocyanates and propyleneimine the best results
of cohesion was achieved with aromatic propyleneimnine
crosslinker and the best adhesion and tack
performance with cycloaliphatic propyleneimine.
* The use of propyleneimines based on s-triazine the s-
triazine derivatives with longer carbon chain are
better for softly PSAs than s-triazine crosslinkers
with ‘‘short structure’’.
* In general the propyleneimine crosslinkers with
central heteroatomin the chemical structure are
stronger than other investigated in this publication
propylenimine compounds. They are very interesting
for cohesive acrylic PSAs.
* From the investigated commercial reaction products
from multifunctional acrylates and propyleneimine
Permutex XR-2500 was the best crosslinker for
acrylics PSAs with the best balanced performance
between tack, adhesion and cohesion.
* The solvent-based PSAss acrylics containing multifunctional
propyleneimines have a very short potlife
froma few hours.
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