Starch-dextrine-polyacrylamide adhesive and tape

Details Starch-dextrine-polyacrylamide adhesive and tape Starch-dextrine-polyacrylamide adhesive and tape

C - Chemistry, Metallurgy

09

J

400/1347, 117/31

C09J 7/04 (2006.01) C08L 3/12 (2006.01) C09J 103/00 (2006.01)

Patent

CA 1053394

ABSTRACT OF THE DISCLOSURE Adhesive composition comprising starch, dextrine, a polyacrylamide and a dispersing agent. The composition is carried by water; but, when the composition is applied to a substrate, the water is evaporated to produce a water activatable adhesive. Thus, the composition is suitable for application to a paper backing to form an adhesive tape. Method of preparing adhesive including the steps of first dissolving the dextrine and polyacrylamide in water and allowing the dextrine and polyacrylamide to mix. The starch is then added to that mixture. Preferably, the dextrine and poly- acrylamide are mixed for at least a half-hour before the starch is added. To prevent the particles of dextrine and poly- acrylamide from aglomerating together, it has been found advantageous to mix the dextrine and polyacrylamide in small batches. This step, however, is not critical.

255972

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