It is not known to what degree the B72 affects the complex set of reactions which the alkoxysilane must undergo to form a solid network polymer. Vapor pressure and weight loss measurements show that B72 has little deterring effect on silane esters evaporation. GPC discloses no reaction between the two components. Headspace analysis confirms this.
Mechanical testing shows that the acrylic polymer weakens the cured product.
From these findings it is concluded that there is no beneficial phase interaction of the B72 with the silane esters in neat mixtures and any advantage accruing from B72 must derive from the adhesive properties of the acrylic polymer. Sol-gel chemistry, in fact, has much to contribute to the stone consolidation arena and this paper charts common ground, points of divergence, and future directions for a concerted effort. What was not pointed out at that time was how little is known about the chemistry and physics of any of the above-mentioned consolidation systems. The Role of B72 Acrylic Resin, Materials Issues in Art and Archaeology II, Vol. Proceedings of the Materials Research Society, Spring Meeting, San Francisco, California, pp.