Bond strength and disbonding behavior of elastomer and emulsion-type dismantlable adhesives used for building materials

A new form of dismantlable adhesive technology has been developed. This is a revolutionary development in the construction industry, which makes it possible for the bonded building materials to be separated by the simple application of heating over 100degreesC. This article describes the design of dismantlable adhesives (elastomer type and emulsion type) and the evaluation of uses for building materials. The weight fraction of thermally expansive particles from 5% to 15% is suitable for both bond strength and dismantlement of joints. The bond strength of joints could not decrease after durability test at 60degreesC-95% RH for 30 days, and then the joints were separated easily by heating from 150 to 180degreesC. At this technology, manufacturing is equal to conventional adhesives and time of heating for dismantlement is quite short, so it is efficient for not only performance (adhesion and dismantlement), but also manufacturing and cost. (C) 2004 Elsevier Ltd. All rights reserved.