Adhesive compositions
AssigneeBayer Aktiengesellschaft
InventorsOtto Ganster, Ralf Werner, Jorg Buchner, Wolfgang Henning
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Abstract
The present invention relates to an aqueous dispersion containing an isocyanate-reactive polymer and a polyisocyanate, wherein the polyisocyanate has a melting or softening point of >30° C. and is in the form of a finely divided powder having a mean particle diameter of less than 100 μm. The present invention also relates to an adhesive composition containing this dispersion and to a process for bonding substrates with this composition.
Claims20
An aqueous dispersion comprising an isocyanate-reactive polymer and a polyisocyanate, wherein the polyisocyanate has a melting or softening point of >30° C. and is in the form of a finely divided powder having a mean particle diameter of less than 100 μm.
A process for the production of an adhesive bond which comprises
- a) applying an aqueous dispersion comprising an isocyanate reactive polymer and a polyisocyanate, wherein the polyisocyanate has a melting or softening point of >30° C. and is in the form of a finely divided powder having a mean particle diameter of less than 100 μm, to a substrate to be bonded,
- b) drying the aqueous dispersion to form a dried adhesive layer,
- c) decrystallizing the dried adhesive layer by heating for a short time and
- d) joining the adhesive layer in the decrystallized state to the substrate to be bonded.
Dependencies are inferred from the claim text.