Coating processes – Coating remains adhesive or is intended to be made adhesive – Pressure sensitive adhesive
Reexamination Certificate
2008-01-08
2008-01-08
Tran, Thao (Department: 1711)
Coating processes
Coating remains adhesive or is intended to be made adhesive
Pressure sensitive adhesive
C427S372200, C427S385500
Reexamination Certificate
active
07316828
ABSTRACT:
The present invention relates to a process for preparing an adhesive bond by i) applying an aqueous dispersion or solution containing a) at least one isocyanate-reactive polymer and b) at least one solid surface-deactivated polyisocyanate to a ii) substrate, iii) drying the aqueous dispersion or solution at a temperature from 20 to 95° C. to form an adhesive layer and iv) treating the adhesive layer with heat at a temperature greater than the temperature used to dry the aqueous dispersion or solution. The present invention also relates to a process for preparing a bond by combining at least one substrate with the adhesive bond of the present invention.Adhesive bonds of the present invention have a shear strength at least 10% greater than the shear strength of adhesive bonds containing a substrate having at least one adhesive layer based on an aqueous dispersion or solution composed of a) and b) dried at a temperature from 20 to 95° C.
REFERENCES:
patent: 4507456 (1985-03-01), Blum et al.
patent: 4543393 (1985-09-01), Blum et al.
patent: 5371133 (1994-12-01), Stanley
patent: 6242504 (2001-06-01), Meyer-Roscher et al.
Aqueous dispersions or solutions having a long shelf life and containing isocyanate-reactive polymers and surface-deactivating solid polyisocyanates, method for producing same and method for producing a layer—Loose Translation for Application LeA 35,536 (PCT/CH99/00577).
Bayer MaterialScience AG
Cheung Noland J.
Klemz Robert S.
Tran Thao
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