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Durability of Building Sealants by Andreas T. Wolf

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EFFECTS OF ENVIRONMENTAL EXPOSURE CONDITIONS AND SEALANT COMPOSITION ON SILICONE SEALANT PROPERTIES

Effects on mechanical properties and apparent cross-link density

D.F.BERGSTROM, R.D.DASHNER and R.H.KRAHNKE

Dow Corning Corporation, Midland, USA

Abstract

Understanding the effects of environmental and chemical composition factors on the long term degradation of silicone sealants allows for better design and use of these materials. The work described herein examines the effects of water, water vapour, UV, heat and ambient ageing conditions on some commercial and lab prepared sealant properties. In addition, designed experiments were conducted to identify the effects of composition factors such as filler, catalyst or adhesion promoter levels on ...

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