| Résumé : |
Most buildings use concrete to provide structural integrity. This concrete typically comes in contact with other building elements such as windows, façades, etc., and these dissimilar surfaces are often “joined” together by sealants. For the integrity of the structure, it is critical that the adhesion between the sealant and the substrates (e.g., concrete with windows, façades, etc.) sustains various environmental stresses like rain, sunlight, and temperature changes. The adhesion between sealant and concrete is particularly challenging on exposure to rain due to very aggressive (high pH) environment in concrete.
Currently available sealants require a primer to retain adhesion under wet conditions, which increases the construction cost and the levels of VOCs. However, a new SPUR+ prepolymer-based sealant can retain adhesion to concrete under wet conditions without the use of a primer. This adhesion was demonstrated using both U.S. and EU testing norms for adhesion to concrete under wet conditions (ASTM C794-06 and ISO 11590). |
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Ajouter le résultat dans votre panier Affiner la rechercheCarving a niche in ADHESIVES AGE, Vol. 45, N° 2 (02/2002)
