Abstract

Adhesives comprise one of the chief classes of polymer-based products. Adhesive bonding is the method of choice for joining many materials, and their use can be expected to expand on a yearly basis because of their versatility and cost-effectiveness. The market economics of adhesives is summarized and updated. The many ways in which adhesives can be classified is covered with an emphasis on their physical forms and types. The various chemistries used to make pressure-sensitive, hot-melt, solvent- and water-based, structural, and natural product adhesives are described in some detail relative to the major constituents commonly used in each as well as the various minor constituents. The general advantages of each class of adhesive are provided. General comments on formulation and the role of the formulator in bringing adhesives to market conclude the article.