Minnesota Mining and Manufacturing Company

Francis W Brown

Steven M Heilmann

George F Bateson

Louis E Winslow

An improvement in acrylate polymer pressure sensitive adhesive compositions consists of using a reactive scavenging monomer to remove objectionable residual monomer by copolymerization to form a non-objectionable copolymer.

Method for removing monomer from an acrylate adhesive by reaction with a

The adhesive layer of the novel pressure-sensitive adhesive tape comprises a polymer of a terminally unsaturated vinyl monomer such as isooctyl acrylate and an emulsifier monomer such as sodium styrene sulfonate. Preferably, the adhesive layer also contains a small amount of a noncationic external emulsifier such as sodium dodecylbenzene sulfonate. Although the tape has excellent adhesive properties, it is removable from a variety of surfaces after one hour at 120.degree. C. and so is useful for purposes such as automotive masking tape.

Removable pressure-sensitive adhesive tape

Normally tacky and pressure-sensitive adhesive tapes, labels, etc. which, when adhered to dry fibrous webs, remain firmly attached when the web and adhesive are thereafter exposed to moist conditions. These performance characteristics, which are not found when conventional pressure-sensitive adhesives are used, result from employing acrylate-based copolymer adhesives made from specific monomers and having inherent viscosities related to the monomers employed.

Growing community of inventors

West St. Paul, MN, United States of America

Francis W Brown