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Adhesives for glass surfaces are classified according to chemical type. The more promising ones for bonding glass are the modified phenolics, the butadiene acrylonitrile vinyl copolymer, and butadiene acrylonitrile polyvinyl butyral. Vinyl phenol, polyvinyl acetate, the celluloses, acrylates, rubber latex, and cyclo-rubber types give fair adhesion for room temperature exposure but deteriorate quite rapidly under moist conditions. Glass-metal adhesives require good weathering qualities but must also be tested for temperature cycling in order to eliminate the more brittle types which induce the strains responsible for glass failure due to differences in thermal expansion. Thus, a well-rounded testing program is very beneficial in selecting adhesives for various fabrications.
Glass Division Research Laboratories, Pittsburgh Pate Glass Co., Creighton, Pa.