TABLE OF CONTENTS This chapter describes the adhesives for specific adherend types. Tables are occasionally published listing large numbers of adhesive types recommended for specific adherends. Such tables can be misleading in supplying information needed to provide strong durable bonds, because the user may not know that some combinations of adhesives and adherends are superior in durability and resistance to other environments. This chapter places emphasis on a listing of the adhesives believed to provide strong lasting bonds. Chapter 5 discusses all adhesives in detail.
Adhesives recommended include modified epoxies, modified phenolics, epoxy-phenolics, neoprene-phenolics, second-generation acrylics, cyanoacrylates, silicone rubbers, and vinyl plastisols. Sell [1] has ranked a number of adhesives in the order of decreasing durability with aluminum adherends as follows:
nitrile-phenolics
high-temperature epoxies
121 C-curing epoxies
121 C-curing rubber-modified epoxies
vinyl epoxies
two-part, room-temperature-curing epoxy paste with amine cure
two-part polyurethanes
Brewis[2] has recently discussed the nature of adhesives used for aluminum. The two major aluminum manufacturers, Aluminum Company of America (ALCOA) and Reynolds Metals, have published small useful volumes on all aspects of aluminum bonding, although these volumes are not recent. [3 ,4 ] Another excellent detailed discussion of aluminum adhesives, particularly from the viewpoint of durability, is given by Minford of ALCOA.[2]
Adhesives recommended include epoxy-phenolics, nitrile-phenolics, epoxies (RT cure, contact pressure), epoxy-nylon, polyimide (PI), polybenzimidazole (PBI), epoxy-nitrile, and polyurethane. As beryllium retains significant strength at temperatures up to 538 C, the high-temperature application area is significant for this somewhat...
