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Toward a Better Understanding of B72 Acrylic Resin/Methyltrimethoxysilane Stone Consolidants

  • G.S. Wheeler (a1), G.L. Shearer (a1), S. Fleming (a2), L.W. Kelts (a3), A. Vega (a4) and R.J. Koestler (a1)...

Abstract

B72 acrylic resin/methyltrimethoxysilane (YMTMOS) mixtures are frequently employed as consolidants for deteriorated limestones, sandstones and marbles- The addition of B72 to MTMOS imparts adhesive properties to the consolidant but it is not known to what degree the B72 affects the reactions which MTMOS must undergo to form a solid polymer network. This paper examines the following chemical, physical, and mechanical properties in order to better understand B72/MTMOS systems: 1. viscosity 2. vapor pressure 3. reaction mechanism and kinetics 4. chemical nature of polymer solids 5. rupture moduli of polymer solids and 6. rupture moduli of stone/consolidant composites.

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1 United States Patent 3,955,988, 11 May 1976. The German Patent is from the 1960s but has not yet been obtained.
2 United States Patent 529, 25 February 1966.
3 Arnold, L. and Price, C.A., Alkoxysilanes for the Preservation of Stone, Building Research Station Note, 1976.
4 Nonfarmale, O., “A method of consolidation and restoration for decayed sandstones,” in The Treatment of Stone, edited by Rossi-Manaresi, R., 1976, p. 401410.
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6 Fifth International Congress on Deterioration and Preservation of Stone, edited by Felix, G., 1985.
7 Larson, J.H., “A museum approach to the techniques of stone conservation,” in The Fourth International Congress on Deterioration and Preservation of Stone, edited by Gauri, K.L. and Gwinn, J.A., 1983, p. 219238.
8 Nishiura, Tadateru, “Laboratory evaluation of the mixture of silane and organic resin as consolidant of granularly decayed stone,” in ICOM Eighth Triennial Meeting, Sydney, Australia, 1987, p. 805807.
9 Bradley, S.M., “Evaluation of organo silanes for use in consolidation of sculpture displayed indoors,” in Fifth International Congress on Deterioration and Preservation of Stone, edited by Felix, G., 1985, p. 759768.
10 Bradley, S.M..

Toward a Better Understanding of B72 Acrylic Resin/Methyltrimethoxysilane Stone Consolidants

  • G.S. Wheeler (a1), G.L. Shearer (a1), S. Fleming (a2), L.W. Kelts (a3), A. Vega (a4) and R.J. Koestler (a1)...

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