Process for the production of a sealing and adhesive...

Details Process for the production of a sealing and adhesive... Process for the production of a sealing and adhesive...

B - Operations, Transporting

29

C

18/966

B29C 47/02 (2006.01) C08G 18/10 (2006.01) C08G 18/22 (2006.01) C09J 5/00 (2006.01)

Patent

CA 1321696

- 17 - Abstract In a method for the production of a sealing and adhesive strip, particularly for the direct glazing of motor vehicles, using a moisture-hardening single-component polyurethane composition based on telechelic isocyanate prepolymers of aromatic di- isocyanates in stoichiometric excess and polyols a composition is employed comprising a) a catalyst for the moisture-hardening and b) a blocked activatable cross-linking agent, and a solvent or solvent mixture is continually injected into the inside of the strip during the extrusion of the strip which liberate the cross-linking agent. For the implementation of the method an extrusion nozzle for the sealing and adhesive strip is used which comprises an injection needle for the solvent opening into the nozzle, the exit opening of which points in the extrusion direction and is located in the region of the centre axis of the extrusion die forming the strip.

605818

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