Adhesive joining of surfaces using thermosetting polyurethane urea reactive adhesive compositions

In the adhesive joining of two surfaces wherein an adhesive is first applied to at least one of the surfaces and the surfaces are then brought into contact with each other, the improvement wherein the adhesive is a thermosetting reactive adhesive

• (i) which is flowable or readily meltable at ambient or slightly elevated temperature,
• (ii) which is stable in storage at ambient temperature,
• (iii) which sets quickly at temperatures of 80.degree. C. or more,
• (iv) which comprises:
• (A) a surface-modified, finely-divided polyisocyanate wherein from 0.1 to 25 equivalent percent of the isocyanate groups of the unmodified polyisocyanate have been deactivated, and
• (B) a member selected from the group consisting of
• (a) aliphatic and/or aromatic polyamines having molecular weights of from 400 to 6000,
• (b) aromatic polyamines having molecular weights of from 108 to 399, and
• (c) mixtures thereof, and
• (v) which can be activated by application of heat, polar solvents and/or high shearing forces.