摘要:
A one-step cleaning and water repellent treatment is provided. An alkaline-stable cleaning solution is mixed with an aqueous solution of alkali metal organosiliconates and applied to porous inorganic surfaces as a one-step cleaning and water repellent treatment. The mixture has been found to be stable and compatible. The one-step cleaning and water repellent treatment functions to simultaneously clean and protect porous inorganic surfaces and, thus, reduces the cost and time necessary to clean and protect such a surface.
摘要:
Sulfonato-organosilanol compounds and aqueous solutions and compositions thereof are provided which have at least one sulfonato-organic substituent therein. The weight percentage of oxygen in the compounds is at least about 30% and the weight percentage of silicon in the compounds is not greater than about 15%, these percentages being taken with reference to the water-free acid form of the compounds. Hydrophilic siliceous surfaces and processes for imparting hydrophilicity to such surfaces are also provided.
摘要:
The invention relates to a method for rendering inorganic surfaces water repellent by treating the surfaces with aqueous soluble carbonates, or bicarbonates simultaneously with, or subsequent to coating the surfaces with an aqueous solution of alkali metal organosiliconates. The inorganic surfaces contain free lime. Surfaces to be treated include shaped building materials such as walls of concrete, clay bricks, natural stone, roofing tile, clay bricks, calcium silicate bricks, and asbestos cement. Wall coatings containing sand and hydraulic or nonhydraulic binding materials such as lime, cement and gypsum may also be treated.
摘要:
The present invention concerns a composition intended for the protection of a solid substrate against environmental attack. The composition includes at least one biocidal component and a hydrophobing agent. The composition is in the liquid phase, and the liquid is a common solvent for the hydrophobing agent and the biocidal component(s).
摘要:
A hardened cement-based mass having a corrosive metallic material embedded therein, or containing an aggregate reactive with an alkaline substance, is impregnated with an aqueous solution containing 1 to 50% by weight of a dissolved nitrite of an alkali metal or alkaline earth metal and 0.01 to 20% by weight of a dissolved organic silicon compound such as sodium methylsiliconate or potassium methylsiconate, or a dissolved or emulsified polymer thereof, or with a solution prepared by using an aliphatic alcohol having 1 to 3 carbon atoms, and containing 1 to 50% by weight of a dissolved nitrite of an alkali metal or alkaline earth metal and 0.01 to 20% by weight of an dissolved organic silicon compound such as methyltrimethoxysilane or ethyltrimethoxysilane, or a dissolved polymer thereof, and is allowed to dry in the air. Alternatively, the mass is coated with an unsolidified cement paste, mortar or concrete containing 1 to 25% by weight of a nitrite of an alkali metal or alkaline earth metal and 0.01 to 20% by weight of an organic silicon compound such as sodium or potassium methylsiliconate, or a polymer thereof, based on the weight of the cement which, e.g., the cement paste contains, and, e.g., the cement paste is allowed to harden in the air.
摘要:
A process for simultaneously cleaning and rendering building materials hydrophobic which comprises applying to the surface of the building material a solution of a hydrophobic agent having admixed therewith a filler having a surface area of at least 50 mg.sup.2 /g and after evaporation of the solvent, removing the filler residue.
摘要:
THE SURFACE OF CONCRETE IS TREATED WITH A SILANE OR A SILICONATE BEFORE IT BECOMES FINALLY SET. IN THE PREFERRED EMBODIMENT, EVAPORATION OF THE WATER FROM THE CONCRETE IS CONTROLLED BY CONVENTIONAL METHODS SUCH AS THE USE OF MEMBRANE CURING COMPOUNDS. THE RESULTING CONCRETE IS RESISTANT TO SCALING AND SPALLING.
摘要:
A composition that may be used to retain moisture within fresh concrete as it cures to optimize the curing of the concrete may include one or more hardening and densifying agents (e.g., alkali metal polysilicate, colloidal silica, etc.) and one or more temporary moisture sealing agents (e.g., a wax, etc.). Additionally, such a composition may include a siliconate (e.g., a metal siliconate, such as an alkali metal siliconate like potassium methyl siliconate, etc.). The hardening and densifying agent of such a composition may penetrate the surface of fresh concrete to react with free lime, providing the fresh concrete with a strong surface. The temporary moisture sealing agent may form a moisture barrier on the surface of the fresh concrete to prevent moisture from escaping from the fresh concrete (e.g., evaporating, etc.) before the fresh concrete has sufficiently cured. The temporary moisture sealing agent may degrade within a matter of days (e.g., three days, seven days, 14 days, less than a month, etc.), facilitating its removal from the surface of the concrete once the concrete has cured and enabling further treatment of the surface without undue delay.