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Acrylic Adhesives: Leader Among Waterborne PSAs

SpecialChem / Edward M. Petrie & Edward M Petrie – Jul 10, 2013

The main focus of this article is waterborne acrylic emulsions and their use as pressure sensitive adhesives. The characteristics and properties of the base polymer are described as well as the components commonly incorporated into adhesive systems. Acrylic adhesives are noted for their versatility and scope. Acrylic adhesives are available as polymeric solvent solutions, waterborne emulsions, or as monomer mixtures, which may be cured by ultraviolet light, heat or chemical catalysts. The adhesives either cure in the bondline (thermosetting acrylic, cyanoacrylate, or anaerobic acrylic monomers) or from high molecular weight polymers that are formed outside the bondline. Although acrylic polymers are used in laminating adhesives and construction sealants, the most common acrylic adhesive types used today are those that are available as water emulsions, and the most common application is in pressure sensitive adhesives (PSAs). They are thermoplastic systems that can be crosslinked depending on the requirements of the application. These waterborne PSAs will be the primary focus of this article.

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