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3M patents adhesive composition

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By: KERRY PIANOFORTE

Editor, Coatings World, Coatings World

Patent No. U.S. 2010272942

3M Innovation Properties has patented a pressure-sensitive adhesive composition having improved initial tack (generally, the pressure-sensitive adhesive composition comprises (1) a carboxylic group-containing (meth)acrylic tacky polymer having a weight average molecular weight of less than 800,000 and a glass transition temperature of -100° C to -30° C, and (2) an amino group-containing (meth)acrylic non-tacky polymer having a weight average molecular weight of from 30,000 to 100,000 and a glass transition temperature of 20° C to 90° C. The amino group-containing (meth)acrylic non-tacky polymer (2) is present in an amount of no less than 1 parts by mass and less than 20 parts by mass on a basis of 100 parts by mass of said carboxylic group-containing (meth)acrylic tacky polymer (1).

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