USE OF COMPOUNDS CONTAINING ALUMINIUM OXIDE AND SILICON OXIDE FOR PRODUCING A HYDROPHILIC BUILDING PRODUCT

摘要

The use of a binder system comprising compounds containing aluminium oxide and silicon oxide for producing a hydrophilic building product, characterized in that the sum of the oxides calculated as Al2O3 and SiO2 in the binder system is ≧40% by weight, based on the water-free binder system, and the contact angle of an oil drop placed on the surface of the cured building product is ≧90°, where the contact angle determination is carried out under water, is proposed. The said hydrophilicity makes the building product easy to clean, with simple rinsing with water often being sufficient.

主权项

1. A method for producing a hydrophilic building product by
contacting with water, setting and curing, a binder system comprising compounds containing aluminum oxide and silicon oxide, wherein the binder system comprises hydraulic binder, latent hydraulic binder, and/or pozzolanic binder; and alkali metal silicate, wherein the hydraulic binder is selected from portland cement, aluminate cement and mixtures thereof, wherein the content of portland cement and/or aluminate cement in the binder system is ≦20% by weight, based on a water-free binder system, wherein the sum of the oxides calculated as Al2O3 and SiO2 in the binder system is ≧40% by weight, based on the water-free binder system, and wherein the contact angle of an oil drop placed on the surface of the cured building product is ≧90°, where the contact angle determination is carried out under water.