Minnesota Mining and Manufacturing Company

Margaret M Sheridan

Spencer F Silver

Joaquin Delgado

John D Moon

Francis M Stark

A pressure-sensitive adhesive comprising an acrylate matrix, and swellable, infusible, insoluble, elastomeric acrylate microspheres, each of the microspheres having discrete boundaries, the microspheres and the matrix forming an interpenetrating polymer network within the boundaries of the microspheres.

Interpenetrating pressure-sensitive adhesive polymer networks

An acrylic terpolymer pressure-sensitive adhesive comprising a photopolymerized polymer containing an alkyl acrylate monomer, the alkyl groups of which have an average of 6 to 12 carbon atoms, a first polar copolymerizable monomer selected from strongly polar monomers, and a second polar monomer selected from the group consisting of strongly polar monomers and moderately polar monomers, a hydrogenated rosin ester tackifying agent, and a photoinitiator, wherein the adhesive has a lower glass transition temperature as measured by Dynamic Mechanical Thermal Analysis than would an identical acrylic terpolymer adhesive omitting the tackifying agent.

Growing community of inventors

Saint Paul, MN, United States of America

Margaret M Sheridan