| solvent-free |
1K systems usually
silane-terminated prepolymers with good
adhesion to glass |
1K are typically used
in automotive industry while
2K are more employed in the building sector or flooring applications |
| 2K systems are applied when rapid curing is needed
and for
structural adhesives |
| hot-melt |
reactive systems bearing a low percentage of free isocyanate
which reacts with air moisture or functional moieties on the surface
of the substrates |
wood industry or shoe soles |
| solvent-based |
high-molar mass prepolymers
prepared with a slight excess of
NCO groups |
shoes, food packaging, automotive, and furniture
industry |
| water-borne |
ionizable
moiety is present to allow the dispersion of 1K as
well as 2K formulations based on temperature sensitive reactive systems |
foot wear, bookbinding, furniture, textile laminates |
| radiation curable |
acrylate-tipped
prepolymers endowing the adhesives with faster
curing and higher stability |
flexible and heat-sensitive
substrates |
