Loth, F.F.LothWildenhain, M.M.WildenhainKupfer, M.M.Kupfer2022-03-082022-03-082007https://publica.fraunhofer.de/handle/publica/307757A polymeric protective film (I) that is adherable to a substrate comprises (A) a polymeric base that is soluble or swellable in cold or hot water and (B) a polymer membrane that is insoluble in water but is water vapour permeable. Also claimed are: (i) a process for the production of (I) by application, preferably by spraying of a solution of polymeric components (A1) and optionally (A2) for the base layer onto the chosen substrate with optional intermediate drying and application preferably by spraying of a solution or dispersion of an oppositely ionically charged polymer component (B) and drying of the resulting film. (ii) a process for the protection of interior and exterior surfaces against deliberate dirtying and the effects of air pollution by application of a protection film (I) that is removable using hot water or steam. USE - The combination of substances (A1), (A2) and (B) are useful for the protection of interior and exterior surfaces whereby (A1) and (A2) may be packaged se parately or together and (B) is packaged separately (claimed). ADVANTAGE - The film (I) offers good protection to substrates against environmental pollution, paint and dyes and is easily removed.de608668patent1997-19736452102005002671