Process for the protection of stone materials, marble, bricks and concrete from decay caused by atmospheric agents and pollutants or by mural writings with paints, inks and the like.

摘要

The present invention relates to a process for the protection of stone materials, marble, bricks and concrete, and of structures made from such materials, from the decay caused by atmospheric agents and pollutants or by mural writings with paints, inks and the like. The process comprises applying to the surface of said materials or structures a mixture which comprises: 1) polytetrafluoroethylene in the form of a fine powder; 2) a perfluoropolyether not bearing functional groups and/or 3) a perfluoropolyether or a fluoropolyether having one chain end, or both chain ends, constituted by functional groups which are capable of forming a chemical and/or physical bond with the material to be protected. n