Pressure sensitive adhesive composition which is repulpable under acidic pH conditions

U.S. Patent Number: 5380779

Abstract: 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 of pH conditions. Also described are tapes comprising the repulpable composition of the invention and their use in papermaking industry.

Inventors: D'Haese; Francois C. (Gent, BE)

Assignee: Minnesota Mining and Manufacturing Company (St. Paul, MN)

Application Number: 08/215,211

Issued: 1995-01-10

Expired: 2007-01-10

Classes: 524/272 ; 428/355R; 524/141; 524/377; 524/516; 524/547; 524/548; 525/186; 526/287; 526/318.41; 526/320

Field of search: 524/141,187,377,547,548,516,272 525/186 526/287,320,318.41 428/355,356

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