Process for protecting and consolidating stone materials
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United States of America Patent
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-
May 18, 1993
Grant Date -
N/A
app pub date -
Sep 27, 1991
filing date -
Oct 1, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Surfaces of stone materials, marble, sandstone, bricks, concrete and articles manufactured therefrom are consolidated and protected from atmospheric agents and pollutants by applying onto said surfaces a mixture consisting of: (a) 2-40% by weight of polyvinylidene fluoride, or 1-20% by weight of a polyalkylmethacrylate wherein the alkyl group contains from 1 to 4 carbon atoms; (b) an elastomeric copolymer of vinylidene fluoride, constituting the balance to 100% and being, in moles, 55-85% of vinylidene fluoride, 15-45% of hexafluoropropene and 0-30% of tetrafluoroethylene.
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