Production of coated building components

US4117197A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Milan Krejci · Krefeld, DE
• Peter Kresse · Krefeld, DE

Key dates

• Filing date: Sep 7, 1976
• Grant date: Sep 26, 1978
• Expiry date: Sep 7, 1996

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31652
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

In the production of a coated building component comprising the steps of mixing an inorganic binder, water and aggregate to produce a workable mass, molding said mass into a preformed component, applying to the preformed component an aqueous paste containing a metal oxide and at least one of waterglass and a phosphate to form a coating and allowing the coating to harden, the improvement which comprises applying about 190 to 400 g of the paste per square meter of surface to be coated, the application being effected in the presence of at least about 0.5% by weight of the inorganic binder or, in the case of lime-sand bricks, by weight of the binder plus aggregate, of a water soluble inorganic salt which converts the aqueous paste into a gel-like non-flowing form. The inorganic salt can be included in the workable mass from which the preformed component is molded or it may be present in a preliminary layer, along with inorganic binder, which is applied to the preformed component in a thickness of about 1 to 50 mm prior to application of the aqueous paste.