PURPOSE: To produce a color-protecting material capable of protecting a porous inorganic material for building and civil work over a long period and imparting the material with beautiful appearance by compounding a (condensed) alkylalkoxysilane, a water-based resin, a pigment, an emulsifier and water. ;CONSTITUTION: A color-protecting material for porous inorganic material for building and civil work is produced by mixing and emulsifying (A) an alkylalkoxysilane (e.g. methyltrimethoxysilane) and/or its condensate, (B) a water-based resin (e.g. water-soluble anionic acrylic resin), (C) a pigment (e.g. phthalocyanine pigment), (D) an emulsifier (e.g. alkylnaphthalenesulfonic acid salt) and (E) water and emulsifying the mixture. As necessary, the material may be incorporated with an antiseptic or a mildew-proofing agent (e.g. 5- chloro-2-methyl-4-isothiazolin-3-one) for preventing the degradation during storage and the growth of mold on the surface of the coating film or with an alkaline compound (e.g. sodium hydroxide) for adjusting the pH of the material.;COPYRIGHT: (C)1994,JPO&Japio
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