Page 280 - Handbook of Adhesives and Sealants

246 Chapter Six

tadiene elastomers. Several diverse materials such as transition metal
complexes, triphenylphosphine, and cobalt acetylacetonate have been
found to be excellent primers to polyolefins bonded with a cyanoac-
rylate adhesive. In these cases, the strength of the joint is often
greater than the strength of the parent plastic. Primers and adhesion
promoters are discussed in detail in the next chapter.

6.6 Specific Surface Treatments

Appendix C lists recommended surface-treating procedures for most
common substrates. There are several text books that provide excel-
lent reviews regarding specific surface treatments for a variety of sub-
strates. These are listed here.

Shields, J., Adhesives Handbook, 3rd edition, (London: Butterworths 1984)
Skeist, I. (ed.), Handbook of Adhesives, 3rd edition (New York: Van Nostrand Reinhold
1990)
Wegman, R. F., Surface Preparation Techniques for Adhesive Bonding, (Park Ridge, NJ:
Noyes Publications 1989)
Snogren, R. C., The Handbook of Surface Preparation, (New York: Palmerton Publishing
1974)
Landrock, A. H., Adhesives Technology Handbook, (Park Ridge, NJ: Noyes Publications
1985)
Cagle, C. V. (ed.), Handbook of Adhesive Bonding, (McGraw Hill: New York 1973)
MIL-HDBK-691B, Adhesive Bonding, Department of Defense, March 1987.
In Chapter 16, common metallic, plastic, elastomeric and other sub-
strates are covered in depth with respect of their unique surface char-
acteristics and recommended bonding processes. These processes have
been found to provide high bond strength and durability.

6.6.1 Metallic adherends
Appendix C-1 lists common recommended surface-treating procedures
for metallic adherends. These methods have been specifically found to
provide reproducible structural bonds and fit easily into the bonding
operation.
ASTM D 2651 describes practices that have proved satisfactory for
preparing various metal surfaces for adhesive bonding. Surface prep-
arations are included for aluminum alloy, titanium alloy, copper and
copper alloys. Formulation and procedures are described in detail that
are based on commercial practice of numerous agencies and organi-
zations.

6.6.2 Plastic adherends
There are many surface treatments available for plastic parts. These
have been developed by the resin manufacturers, assembly manufac-