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Surfactants and Adherent Silicon Resins - New Protective Agents for Natural Stone

  • Rolf Snethlage (a1) and Eberhard Wendler (a2)

Abstract

The present paper reports investigations on the application of surfactants in the stone conservation. It is found that alkyl ammonium chlorides reduce the hygric dilatation of clay-rich sandstones to half of the original value. Polysiloxane films can be tightly bound to clay mineral basal planes using aminoalkyl silane as primer. The water uptake as well as the hygric swelling are markedly reduced. Well defined mixtures of ethanolic alkyl silane and aqueous aminoalkyl silane solutions form stable microemulsions. They can be used as commercial conservative products which are compatable with the environment.

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1. Weiss, A., Z.Anorg.Allg.Chem. 297/5-6, 257360 (1958)
2. Schuhmann, H., in Materials Science and Restoration, edited by Wittmann, F.H. (2nd Int. Coll., TA Esslingen, 1986) pp. 659664.
3. Snethlage, R., in Steinkonservierunq 1979-1983, edited by Petzet, M. (Arbeitshefte des Bayer. Landesamtes fur Denkmalpflege Nr.22, Munich, 1984), p. 110.

Surfactants and Adherent Silicon Resins - New Protective Agents for Natural Stone

  • Rolf Snethlage (a1) and Eberhard Wendler (a2)

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