| 摘要 |
<p>There is described a process for protecting marble, stone, tiles, cement and analogous materials, utilized in the building industry, from the action of atmospheric agents and pollutants, by applying to the surface of the material an emulsion of perfluoropolyethers, optinally having at one end or at both ends or in the chain functional groups capable of acting as anchoring agents to the substrate.</p> |
