C - Chemistry – Metallurgy – 09 – J
Patent
C - Chemistry, Metallurgy
09
J
C09J 133/06 (2006.01) C09J 7/00 (2006.01) C09J 7/02 (2006.01) C09J 7/04 (2006.01) C09J 133/08 (2006.01) D21C 5/02 (2006.01)
Patent
CA 2115670
2115670 9306184 PCTABS00021 A pressure sensitive adhesive composition is described which is water-dispersible under acidic conditions. The composition comprises a terpolymer of a hydrophobic monomeric acrylic or methacrylic ester of a non-tertiary alcohol (monomer A); a polar monomer copolymerizable with said A monomer and having carboxylic, sulfonic acid or hydroxyl functionality or combinations thereof (monomer B); and a water soluble or water-dispersible macromolecular monomer of the formula X-Y-Z which is copolymerizable with A and B wherein X is a copolymerizable moiety containing a double bond, Y is a divalent linking group and Z is a water-dispersible polymeric moiety (monomer C). The combined acid groups employed in the B monomer are neutralized from 5 to 100 % based on the total amount of acid groups in B. The composition further comprises tackifier and/or plasticizers at a level such that the ratio of terpolymer to additives falls within a range of from 0.2:1 to 5:1. The pressure sensitive adhesive composition is dispersible under a variety ofpH conditions. Also described are tapes comprising the repulpable composition of the invention and their use in papermaking industry.
Minnesota Mining And Manufacturing Company
Smart & Biggar
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