Water dispersible polyurethane adhesive compositions

Details Water dispersible polyurethane adhesive compositions Water dispersible polyurethane adhesive compositions

C - Chemistry, Metallurgy

08

L

117/30, 400/5504

C08L 75/04 (2006.01) C08G 18/08 (2006.01) C08G 18/10 (2006.01) C08L 63/00 (2006.01) C09J 163/00 (2006.01) C09J 175/04 (2006.01)

Patent

CA 1254692

WATER DISPERSIBLE POLYURETHANE ADHESIVE COMPOSITIONS ABSTRACT OF THE DISCLOSURE A method for forming a urethane adhesive layer from an aqueous system by mixing a first component comprising a water dispersible oligourethane having a plurality of Image groups with an organic water dispersible second component to initially form a relatively low molecular weight composition tacky at a temperature below about 90°C after removal of aqueous solvent followed by subsequent formation of a higher molecular weight composition, applying a layer of the resulting mixture to a substrate and removing the aqueous solvent from the layer to form an adhesive layer tacky at a temperature below 90°C. The invention also includes the adhesive layer and the method for adhering surfaces using such a layer.

452458

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